User login
Popular Weight Loss Drugs Now for Patients With Cancer?
Demand for new weight loss drugs has surged over the past few years.
Led by the antiobesity drugs semaglutide (Wegovy) and tirzepatide (Zepbound), these popular medications — more commonly known as glucagon-like peptide 1 (GLP-1) agonists — have become game changers for shedding excess pounds.
Aside from obesity indications, both drugs have been approved to treat type 2 diabetes under different brand names and have a growing list of other potential benefits, such as reducing inflammation and depression.
While there’s limited data to support the use of GLP-1 agonists for weight loss in cancer, some oncologists have begun carefully integrating the antiobesity agents into care and studying their effects in this patient population.
The reason: Research suggests that obesity can reduce the effectiveness of cancer therapies, especially in patients with breast cancer, and can increase the risk for treatment-related side effects.
The idea is that managing patients’ weight will improve their cancer outcomes, explained Lajos Pusztai, MD, PhD, a breast cancer specialist and professor of medicine at Yale School of Medicine in New Haven, Connecticut.
Although Dr. Pusztai and his oncology peers at Yale don’t yet use GPL-1 agonists, Neil Iyengar, MD, and colleagues have begun doing so to help some patients with breast cancer manage their weight. Dr. Iyengar estimates that a few hundred — almost 40% — of his patients are on the antiobesity drugs.
“For a patient who has really tried to reduce their weight and who is in the obese range, that’s where I think the use of these medications can be considered,” said Dr. Iyengar, a breast cancer oncologist at Memorial Sloan Kettering Cancer Center in New York City.
Why GLP-1s in Cancer?
GLP-1 is a hormone that the small intestine releases after eating. GLP-1 agonists work by mimicking GLP-1 to trigger the release of insulin and reduce the production of glucagon — two processes that help regulate blood sugar.
These agents, such as Wegovy (or Ozempic when prescribed for diabetes), also slow gastric emptying and can make people feel fuller longer.
Zebound (or Mounjaro for type 2 diabetes) is considered a dual GLP-1 and glucose-dependent insulinotropic polypeptide agonist, which may enhance its weight loss benefits.
In practice, however, these drugs can increase nausea and vomiting from chemotherapy, so Dr. Iyengar typically has patients use them afterwards, during maintenance treatment.
Oncologists don’t prescribe the drugs themselves but instead refer patients to endocrinologists or weight management centers that then write the prescriptions. Taking these drugs involves weekly subcutaneous injections patients can administer themselves.
Endocrinologist Emily Gallagher, MD, PhD, of Mount Sinai Hospital in New York City, estimates she has prescribed the antiobesity drugs to a few hundred patients with cancer and, like Dr. Iyengar, uses the drugs during maintenance treatment with hormone therapy for breast cancer. She also has used these agents in patients with prostate and endometrial cancers and has found the drugs can help counter steroid weight gain in multiple myeloma.
But, to date, the evidence for using GPL-1 agonists in cancer remains limited and the practice has not yet become widespread.
Research largely comes down to a few small retrospective studies in patients with breast cancer receiving aromatase inhibitors. Although no safety issues have emerged so far, these initial reports suggest that the drugs lead to significantly less weight loss in patients with cancer compared to the general population.
Dr. Iyengar led one recent study, presented at the 2024 annual meeting of the American Society of Clinical Oncology, in which he and his team assessed outcomes in 75 women with breast cancer who received a GLP-1 agonist. Almost 80% of patients had diabetes, and 60% received hormone therapy, most commonly an aromatase inhibitor. Patients’ median body mass index (BMI) at baseline was 34 kg/m2 (range, 23-50 kg/m2).
From baseline, patients lost 6.2 kg, on average, or about 5% of their total body weight, 12 months after initiating GLP-1 therapy.
In contrast, phase 3 trials show much higher mean weight loss — about two times — in patients without cancer.
Another recent study also reported modest weight loss results in patients with breast cancer undergoing endocrine therapy. The researchers reported that, at 12 months, Wegovy led to 4.34% reduction in BMI, compared with a 14% change reported in the general population. Zebound, however, was associated with a 2.31% BMI increase overall — though some patients did experience a decrease — compared with a 15% reduction in the general population.
“These findings indicate a substantially reduced weight loss efficacy in breast cancer patients on endocrine therapy compared to the general population,” the authors concluded.
It’s unclear why the drugs appear to not work as well in patients with cancer. It’s possible that hormone therapy or metabolic changes interfere with their effectiveness, given that some cancer therapies lead to weight gain. Steroids and hormone therapies, for instance, often increase appetite, and some treatments can slow patients’ metabolism or lead to fatigue, which can make it harder to exercise.
Patients with cancer may need a higher dose of GLP-1 agonists to achieve similar weight loss to the general population, Dr. Iyengar noted.
However, Dr. Gallagher said, in her own experience, she hasn’t found the drugs to be less effective in patients with cancer, especially the newer agents, like Wegovy and Zepbound.
As for safety, Wegovy and Zepbound both carry a black box warning for thyroid C-cell tumors, including medullary thyroid carcinoma. (Recent research, however, has found that GLP-1 agonists do not increase thyroid cancer risk).
These antiobesity agents are also contraindicated in patients with a personal or family history of medullary thyroid carcinoma and in patients who have multiple endocrine neoplasia syndrome type 2, which is associated with medullary thyroid carcinoma.
Dr. Gallagher hasn’t seen any secondary tumors — thyroid or otherwise — in her patients with cancer, but she follows the labeling contraindications. Dr. Iyengar also noted that more recent and larger data sets have shown no impact on this risk, which may not actually exist, he said
Dr. Gallagher remains cautious about using GPL-1 agonists in patients who have had bariatric surgery because these agents can compound the slower gastric emptying and intestinal transit from surgery, potentially leading to gastrointestinal obstructions.
Looking ahead, GPL-1 manufacturers are interested in adding cancer indications to the drug labeling. Both Dr. Iyengar and Dr. Gallagher said their institutions are in talks with companies to participate in large, multicenter, global phase 3 trials.
Dr. Iyengar welcomes the efforts, not only to test the effectiveness of GPL-1 agonists in oncology but also to “nail down” their safety in cancer.
“I don’t think that there’s mechanistically anything that’s particularly worrisome,” and current observations suggest that these drugs are likely to be safe, Dr. Iyengar said. Even so, “GLP-1 agonists do a lot of things that we don’t fully understand yet.”
The bigger challenge, Dr. Iyengar noted, is that companies will have to show a sizable benefit to using these drugs in patients with cancer to get the Food and Drug Administration’s approval. And to move the needle on cancer-specific outcomes, these antiobesity drugs will need to demonstrate significant, durable weight loss in patients with cancer.
But if these drugs can do that, “I think it’s going to be one of the biggest advances in medicine and oncology given the obesity and cancer epidemic,” Dr. Iyengar said.
Dr. Iyengar has adviser and/or researcher ties with companies that make or are developing GPL-1 agonists, including AstraZeneca, Novartis, Gilead, and Pfizer. Dr. Gallagher is a consultant for Novartis, Flare Therapeutics, Reactive Biosciences, and Seagen.
A version of this article first appeared on Medscape.com.
Demand for new weight loss drugs has surged over the past few years.
Led by the antiobesity drugs semaglutide (Wegovy) and tirzepatide (Zepbound), these popular medications — more commonly known as glucagon-like peptide 1 (GLP-1) agonists — have become game changers for shedding excess pounds.
Aside from obesity indications, both drugs have been approved to treat type 2 diabetes under different brand names and have a growing list of other potential benefits, such as reducing inflammation and depression.
While there’s limited data to support the use of GLP-1 agonists for weight loss in cancer, some oncologists have begun carefully integrating the antiobesity agents into care and studying their effects in this patient population.
The reason: Research suggests that obesity can reduce the effectiveness of cancer therapies, especially in patients with breast cancer, and can increase the risk for treatment-related side effects.
The idea is that managing patients’ weight will improve their cancer outcomes, explained Lajos Pusztai, MD, PhD, a breast cancer specialist and professor of medicine at Yale School of Medicine in New Haven, Connecticut.
Although Dr. Pusztai and his oncology peers at Yale don’t yet use GPL-1 agonists, Neil Iyengar, MD, and colleagues have begun doing so to help some patients with breast cancer manage their weight. Dr. Iyengar estimates that a few hundred — almost 40% — of his patients are on the antiobesity drugs.
“For a patient who has really tried to reduce their weight and who is in the obese range, that’s where I think the use of these medications can be considered,” said Dr. Iyengar, a breast cancer oncologist at Memorial Sloan Kettering Cancer Center in New York City.
Why GLP-1s in Cancer?
GLP-1 is a hormone that the small intestine releases after eating. GLP-1 agonists work by mimicking GLP-1 to trigger the release of insulin and reduce the production of glucagon — two processes that help regulate blood sugar.
These agents, such as Wegovy (or Ozempic when prescribed for diabetes), also slow gastric emptying and can make people feel fuller longer.
Zebound (or Mounjaro for type 2 diabetes) is considered a dual GLP-1 and glucose-dependent insulinotropic polypeptide agonist, which may enhance its weight loss benefits.
In practice, however, these drugs can increase nausea and vomiting from chemotherapy, so Dr. Iyengar typically has patients use them afterwards, during maintenance treatment.
Oncologists don’t prescribe the drugs themselves but instead refer patients to endocrinologists or weight management centers that then write the prescriptions. Taking these drugs involves weekly subcutaneous injections patients can administer themselves.
Endocrinologist Emily Gallagher, MD, PhD, of Mount Sinai Hospital in New York City, estimates she has prescribed the antiobesity drugs to a few hundred patients with cancer and, like Dr. Iyengar, uses the drugs during maintenance treatment with hormone therapy for breast cancer. She also has used these agents in patients with prostate and endometrial cancers and has found the drugs can help counter steroid weight gain in multiple myeloma.
But, to date, the evidence for using GPL-1 agonists in cancer remains limited and the practice has not yet become widespread.
Research largely comes down to a few small retrospective studies in patients with breast cancer receiving aromatase inhibitors. Although no safety issues have emerged so far, these initial reports suggest that the drugs lead to significantly less weight loss in patients with cancer compared to the general population.
Dr. Iyengar led one recent study, presented at the 2024 annual meeting of the American Society of Clinical Oncology, in which he and his team assessed outcomes in 75 women with breast cancer who received a GLP-1 agonist. Almost 80% of patients had diabetes, and 60% received hormone therapy, most commonly an aromatase inhibitor. Patients’ median body mass index (BMI) at baseline was 34 kg/m2 (range, 23-50 kg/m2).
From baseline, patients lost 6.2 kg, on average, or about 5% of their total body weight, 12 months after initiating GLP-1 therapy.
In contrast, phase 3 trials show much higher mean weight loss — about two times — in patients without cancer.
Another recent study also reported modest weight loss results in patients with breast cancer undergoing endocrine therapy. The researchers reported that, at 12 months, Wegovy led to 4.34% reduction in BMI, compared with a 14% change reported in the general population. Zebound, however, was associated with a 2.31% BMI increase overall — though some patients did experience a decrease — compared with a 15% reduction in the general population.
“These findings indicate a substantially reduced weight loss efficacy in breast cancer patients on endocrine therapy compared to the general population,” the authors concluded.
It’s unclear why the drugs appear to not work as well in patients with cancer. It’s possible that hormone therapy or metabolic changes interfere with their effectiveness, given that some cancer therapies lead to weight gain. Steroids and hormone therapies, for instance, often increase appetite, and some treatments can slow patients’ metabolism or lead to fatigue, which can make it harder to exercise.
Patients with cancer may need a higher dose of GLP-1 agonists to achieve similar weight loss to the general population, Dr. Iyengar noted.
However, Dr. Gallagher said, in her own experience, she hasn’t found the drugs to be less effective in patients with cancer, especially the newer agents, like Wegovy and Zepbound.
As for safety, Wegovy and Zepbound both carry a black box warning for thyroid C-cell tumors, including medullary thyroid carcinoma. (Recent research, however, has found that GLP-1 agonists do not increase thyroid cancer risk).
These antiobesity agents are also contraindicated in patients with a personal or family history of medullary thyroid carcinoma and in patients who have multiple endocrine neoplasia syndrome type 2, which is associated with medullary thyroid carcinoma.
Dr. Gallagher hasn’t seen any secondary tumors — thyroid or otherwise — in her patients with cancer, but she follows the labeling contraindications. Dr. Iyengar also noted that more recent and larger data sets have shown no impact on this risk, which may not actually exist, he said
Dr. Gallagher remains cautious about using GPL-1 agonists in patients who have had bariatric surgery because these agents can compound the slower gastric emptying and intestinal transit from surgery, potentially leading to gastrointestinal obstructions.
Looking ahead, GPL-1 manufacturers are interested in adding cancer indications to the drug labeling. Both Dr. Iyengar and Dr. Gallagher said their institutions are in talks with companies to participate in large, multicenter, global phase 3 trials.
Dr. Iyengar welcomes the efforts, not only to test the effectiveness of GPL-1 agonists in oncology but also to “nail down” their safety in cancer.
“I don’t think that there’s mechanistically anything that’s particularly worrisome,” and current observations suggest that these drugs are likely to be safe, Dr. Iyengar said. Even so, “GLP-1 agonists do a lot of things that we don’t fully understand yet.”
The bigger challenge, Dr. Iyengar noted, is that companies will have to show a sizable benefit to using these drugs in patients with cancer to get the Food and Drug Administration’s approval. And to move the needle on cancer-specific outcomes, these antiobesity drugs will need to demonstrate significant, durable weight loss in patients with cancer.
But if these drugs can do that, “I think it’s going to be one of the biggest advances in medicine and oncology given the obesity and cancer epidemic,” Dr. Iyengar said.
Dr. Iyengar has adviser and/or researcher ties with companies that make or are developing GPL-1 agonists, including AstraZeneca, Novartis, Gilead, and Pfizer. Dr. Gallagher is a consultant for Novartis, Flare Therapeutics, Reactive Biosciences, and Seagen.
A version of this article first appeared on Medscape.com.
Demand for new weight loss drugs has surged over the past few years.
Led by the antiobesity drugs semaglutide (Wegovy) and tirzepatide (Zepbound), these popular medications — more commonly known as glucagon-like peptide 1 (GLP-1) agonists — have become game changers for shedding excess pounds.
Aside from obesity indications, both drugs have been approved to treat type 2 diabetes under different brand names and have a growing list of other potential benefits, such as reducing inflammation and depression.
While there’s limited data to support the use of GLP-1 agonists for weight loss in cancer, some oncologists have begun carefully integrating the antiobesity agents into care and studying their effects in this patient population.
The reason: Research suggests that obesity can reduce the effectiveness of cancer therapies, especially in patients with breast cancer, and can increase the risk for treatment-related side effects.
The idea is that managing patients’ weight will improve their cancer outcomes, explained Lajos Pusztai, MD, PhD, a breast cancer specialist and professor of medicine at Yale School of Medicine in New Haven, Connecticut.
Although Dr. Pusztai and his oncology peers at Yale don’t yet use GPL-1 agonists, Neil Iyengar, MD, and colleagues have begun doing so to help some patients with breast cancer manage their weight. Dr. Iyengar estimates that a few hundred — almost 40% — of his patients are on the antiobesity drugs.
“For a patient who has really tried to reduce their weight and who is in the obese range, that’s where I think the use of these medications can be considered,” said Dr. Iyengar, a breast cancer oncologist at Memorial Sloan Kettering Cancer Center in New York City.
Why GLP-1s in Cancer?
GLP-1 is a hormone that the small intestine releases after eating. GLP-1 agonists work by mimicking GLP-1 to trigger the release of insulin and reduce the production of glucagon — two processes that help regulate blood sugar.
These agents, such as Wegovy (or Ozempic when prescribed for diabetes), also slow gastric emptying and can make people feel fuller longer.
Zebound (or Mounjaro for type 2 diabetes) is considered a dual GLP-1 and glucose-dependent insulinotropic polypeptide agonist, which may enhance its weight loss benefits.
In practice, however, these drugs can increase nausea and vomiting from chemotherapy, so Dr. Iyengar typically has patients use them afterwards, during maintenance treatment.
Oncologists don’t prescribe the drugs themselves but instead refer patients to endocrinologists or weight management centers that then write the prescriptions. Taking these drugs involves weekly subcutaneous injections patients can administer themselves.
Endocrinologist Emily Gallagher, MD, PhD, of Mount Sinai Hospital in New York City, estimates she has prescribed the antiobesity drugs to a few hundred patients with cancer and, like Dr. Iyengar, uses the drugs during maintenance treatment with hormone therapy for breast cancer. She also has used these agents in patients with prostate and endometrial cancers and has found the drugs can help counter steroid weight gain in multiple myeloma.
But, to date, the evidence for using GPL-1 agonists in cancer remains limited and the practice has not yet become widespread.
Research largely comes down to a few small retrospective studies in patients with breast cancer receiving aromatase inhibitors. Although no safety issues have emerged so far, these initial reports suggest that the drugs lead to significantly less weight loss in patients with cancer compared to the general population.
Dr. Iyengar led one recent study, presented at the 2024 annual meeting of the American Society of Clinical Oncology, in which he and his team assessed outcomes in 75 women with breast cancer who received a GLP-1 agonist. Almost 80% of patients had diabetes, and 60% received hormone therapy, most commonly an aromatase inhibitor. Patients’ median body mass index (BMI) at baseline was 34 kg/m2 (range, 23-50 kg/m2).
From baseline, patients lost 6.2 kg, on average, or about 5% of their total body weight, 12 months after initiating GLP-1 therapy.
In contrast, phase 3 trials show much higher mean weight loss — about two times — in patients without cancer.
Another recent study also reported modest weight loss results in patients with breast cancer undergoing endocrine therapy. The researchers reported that, at 12 months, Wegovy led to 4.34% reduction in BMI, compared with a 14% change reported in the general population. Zebound, however, was associated with a 2.31% BMI increase overall — though some patients did experience a decrease — compared with a 15% reduction in the general population.
“These findings indicate a substantially reduced weight loss efficacy in breast cancer patients on endocrine therapy compared to the general population,” the authors concluded.
It’s unclear why the drugs appear to not work as well in patients with cancer. It’s possible that hormone therapy or metabolic changes interfere with their effectiveness, given that some cancer therapies lead to weight gain. Steroids and hormone therapies, for instance, often increase appetite, and some treatments can slow patients’ metabolism or lead to fatigue, which can make it harder to exercise.
Patients with cancer may need a higher dose of GLP-1 agonists to achieve similar weight loss to the general population, Dr. Iyengar noted.
However, Dr. Gallagher said, in her own experience, she hasn’t found the drugs to be less effective in patients with cancer, especially the newer agents, like Wegovy and Zepbound.
As for safety, Wegovy and Zepbound both carry a black box warning for thyroid C-cell tumors, including medullary thyroid carcinoma. (Recent research, however, has found that GLP-1 agonists do not increase thyroid cancer risk).
These antiobesity agents are also contraindicated in patients with a personal or family history of medullary thyroid carcinoma and in patients who have multiple endocrine neoplasia syndrome type 2, which is associated with medullary thyroid carcinoma.
Dr. Gallagher hasn’t seen any secondary tumors — thyroid or otherwise — in her patients with cancer, but she follows the labeling contraindications. Dr. Iyengar also noted that more recent and larger data sets have shown no impact on this risk, which may not actually exist, he said
Dr. Gallagher remains cautious about using GPL-1 agonists in patients who have had bariatric surgery because these agents can compound the slower gastric emptying and intestinal transit from surgery, potentially leading to gastrointestinal obstructions.
Looking ahead, GPL-1 manufacturers are interested in adding cancer indications to the drug labeling. Both Dr. Iyengar and Dr. Gallagher said their institutions are in talks with companies to participate in large, multicenter, global phase 3 trials.
Dr. Iyengar welcomes the efforts, not only to test the effectiveness of GPL-1 agonists in oncology but also to “nail down” their safety in cancer.
“I don’t think that there’s mechanistically anything that’s particularly worrisome,” and current observations suggest that these drugs are likely to be safe, Dr. Iyengar said. Even so, “GLP-1 agonists do a lot of things that we don’t fully understand yet.”
The bigger challenge, Dr. Iyengar noted, is that companies will have to show a sizable benefit to using these drugs in patients with cancer to get the Food and Drug Administration’s approval. And to move the needle on cancer-specific outcomes, these antiobesity drugs will need to demonstrate significant, durable weight loss in patients with cancer.
But if these drugs can do that, “I think it’s going to be one of the biggest advances in medicine and oncology given the obesity and cancer epidemic,” Dr. Iyengar said.
Dr. Iyengar has adviser and/or researcher ties with companies that make or are developing GPL-1 agonists, including AstraZeneca, Novartis, Gilead, and Pfizer. Dr. Gallagher is a consultant for Novartis, Flare Therapeutics, Reactive Biosciences, and Seagen.
A version of this article first appeared on Medscape.com.
Does Medicare Advantage Offer Higher-Value Chemotherapy?
TOPLINE:
METHODOLOGY:
- Private Medicare Advantage plans enroll more than half of the Medicare population, but it is unknown if or how the cost restrictions they impose affect chemotherapy, which accounts for a large portion of cancer care costs.
- Researchers conducted a cohort study using national Medicare data from January 2015 to December 2019 to look at Medicare Advantage enrollment and treatment patterns for patients with cancer receiving chemotherapy.
- The study included 96,501 Medicare Advantage enrollees and 206,274 traditional Medicare beneficiaries who initiated chemotherapy between January 2016 and December 2019 (mean age, ~73 years; ~56% women; Hispanic individuals, 15% and 8%; Black individuals, 15% and 8%; and White individuals, 75% and 86%, respectively).
- Resource use and care quality were measured during a 6-month period following chemotherapy initiation, and survival days were measured 18 months after beginning chemotherapy.
- Resource use measures included hospital inpatient services, outpatient care, prescription drugs, hospice services, and chemotherapy services. Quality measures included chemotherapy-related emergency visits and hospital admissions, as well as avoidable emergency visits and preventable hospitalizations.
TAKEAWAY:
- Medicare Advantage plans had lower resource use than traditional Medicare per enrollee with cancer undergoing chemotherapy ($8718 lower; 95% CI, $8343-$9094).
- The lower resource use was largely caused by fewer chemotherapy visits and less expensive chemotherapy per visit in Medicare Advantage plans ($5032 lower; 95% CI, $4772-$5293).
- Medicare Advantage enrollees had 2.5 percentage points fewer chemotherapy-related emergency department visits and 0.7 percentage points fewer chemotherapy-related hospitalizations than traditional Medicare beneficiaries.
- There was no clinically meaningful difference in survival between Medicare Advantage and traditional Medicare beneficiaries during the 18 months following chemotherapy initiation.
IN PRACTICE:
“Our new finding is that MA [Medicare Advantage] plans had lower resource use than TM [traditional Medicare] among enrollees with cancer undergoing chemotherapy — a serious condition managed by specialists and requiring expensive treatments. This suggests that MA’s cost advantages over TM are not limited to conditions for which low-cost primary care management can avoid costly services,” the authors wrote.
SOURCE:
The study was led by Yamini Kalidindi, PhD, McDermott+ Consulting, Washington, DC. It was published online on September 20, 2024, in JAMA Network Open (doi: 10.1001/jamanetworkopen.2024.34707), with a commentary.
LIMITATIONS:
The study’s findings may be affected by unobserved patient characteristics despite the use of inverse-probability weighting. The exclusion of Medicare Advantage enrollees in contracts with incomplete encounter data limits the generalizability of the results. The study does not apply to beneficiaries without Part D drug coverage. Quality measures were limited to those available from claims and encounter data, lacking information on patients’ cancer stage. The 18-month measure of survival might not adequately capture survival differences associated with early-stage cancers. The study did not measure whether patient care followed recommended guidelines.
DISCLOSURES:
Various authors reported grants from the National Institute on Aging, the National Institutes of Health, The Commonwealth Fund, Arnold Ventures, the National Cancer Institute, the Department of Defense, and the National Institute of Health Care Management. Additional disclosures are noted in the original article.
This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article first appeared on Medscape.com.
TOPLINE:
METHODOLOGY:
- Private Medicare Advantage plans enroll more than half of the Medicare population, but it is unknown if or how the cost restrictions they impose affect chemotherapy, which accounts for a large portion of cancer care costs.
- Researchers conducted a cohort study using national Medicare data from January 2015 to December 2019 to look at Medicare Advantage enrollment and treatment patterns for patients with cancer receiving chemotherapy.
- The study included 96,501 Medicare Advantage enrollees and 206,274 traditional Medicare beneficiaries who initiated chemotherapy between January 2016 and December 2019 (mean age, ~73 years; ~56% women; Hispanic individuals, 15% and 8%; Black individuals, 15% and 8%; and White individuals, 75% and 86%, respectively).
- Resource use and care quality were measured during a 6-month period following chemotherapy initiation, and survival days were measured 18 months after beginning chemotherapy.
- Resource use measures included hospital inpatient services, outpatient care, prescription drugs, hospice services, and chemotherapy services. Quality measures included chemotherapy-related emergency visits and hospital admissions, as well as avoidable emergency visits and preventable hospitalizations.
TAKEAWAY:
- Medicare Advantage plans had lower resource use than traditional Medicare per enrollee with cancer undergoing chemotherapy ($8718 lower; 95% CI, $8343-$9094).
- The lower resource use was largely caused by fewer chemotherapy visits and less expensive chemotherapy per visit in Medicare Advantage plans ($5032 lower; 95% CI, $4772-$5293).
- Medicare Advantage enrollees had 2.5 percentage points fewer chemotherapy-related emergency department visits and 0.7 percentage points fewer chemotherapy-related hospitalizations than traditional Medicare beneficiaries.
- There was no clinically meaningful difference in survival between Medicare Advantage and traditional Medicare beneficiaries during the 18 months following chemotherapy initiation.
IN PRACTICE:
“Our new finding is that MA [Medicare Advantage] plans had lower resource use than TM [traditional Medicare] among enrollees with cancer undergoing chemotherapy — a serious condition managed by specialists and requiring expensive treatments. This suggests that MA’s cost advantages over TM are not limited to conditions for which low-cost primary care management can avoid costly services,” the authors wrote.
SOURCE:
The study was led by Yamini Kalidindi, PhD, McDermott+ Consulting, Washington, DC. It was published online on September 20, 2024, in JAMA Network Open (doi: 10.1001/jamanetworkopen.2024.34707), with a commentary.
LIMITATIONS:
The study’s findings may be affected by unobserved patient characteristics despite the use of inverse-probability weighting. The exclusion of Medicare Advantage enrollees in contracts with incomplete encounter data limits the generalizability of the results. The study does not apply to beneficiaries without Part D drug coverage. Quality measures were limited to those available from claims and encounter data, lacking information on patients’ cancer stage. The 18-month measure of survival might not adequately capture survival differences associated with early-stage cancers. The study did not measure whether patient care followed recommended guidelines.
DISCLOSURES:
Various authors reported grants from the National Institute on Aging, the National Institutes of Health, The Commonwealth Fund, Arnold Ventures, the National Cancer Institute, the Department of Defense, and the National Institute of Health Care Management. Additional disclosures are noted in the original article.
This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article first appeared on Medscape.com.
TOPLINE:
METHODOLOGY:
- Private Medicare Advantage plans enroll more than half of the Medicare population, but it is unknown if or how the cost restrictions they impose affect chemotherapy, which accounts for a large portion of cancer care costs.
- Researchers conducted a cohort study using national Medicare data from January 2015 to December 2019 to look at Medicare Advantage enrollment and treatment patterns for patients with cancer receiving chemotherapy.
- The study included 96,501 Medicare Advantage enrollees and 206,274 traditional Medicare beneficiaries who initiated chemotherapy between January 2016 and December 2019 (mean age, ~73 years; ~56% women; Hispanic individuals, 15% and 8%; Black individuals, 15% and 8%; and White individuals, 75% and 86%, respectively).
- Resource use and care quality were measured during a 6-month period following chemotherapy initiation, and survival days were measured 18 months after beginning chemotherapy.
- Resource use measures included hospital inpatient services, outpatient care, prescription drugs, hospice services, and chemotherapy services. Quality measures included chemotherapy-related emergency visits and hospital admissions, as well as avoidable emergency visits and preventable hospitalizations.
TAKEAWAY:
- Medicare Advantage plans had lower resource use than traditional Medicare per enrollee with cancer undergoing chemotherapy ($8718 lower; 95% CI, $8343-$9094).
- The lower resource use was largely caused by fewer chemotherapy visits and less expensive chemotherapy per visit in Medicare Advantage plans ($5032 lower; 95% CI, $4772-$5293).
- Medicare Advantage enrollees had 2.5 percentage points fewer chemotherapy-related emergency department visits and 0.7 percentage points fewer chemotherapy-related hospitalizations than traditional Medicare beneficiaries.
- There was no clinically meaningful difference in survival between Medicare Advantage and traditional Medicare beneficiaries during the 18 months following chemotherapy initiation.
IN PRACTICE:
“Our new finding is that MA [Medicare Advantage] plans had lower resource use than TM [traditional Medicare] among enrollees with cancer undergoing chemotherapy — a serious condition managed by specialists and requiring expensive treatments. This suggests that MA’s cost advantages over TM are not limited to conditions for which low-cost primary care management can avoid costly services,” the authors wrote.
SOURCE:
The study was led by Yamini Kalidindi, PhD, McDermott+ Consulting, Washington, DC. It was published online on September 20, 2024, in JAMA Network Open (doi: 10.1001/jamanetworkopen.2024.34707), with a commentary.
LIMITATIONS:
The study’s findings may be affected by unobserved patient characteristics despite the use of inverse-probability weighting. The exclusion of Medicare Advantage enrollees in contracts with incomplete encounter data limits the generalizability of the results. The study does not apply to beneficiaries without Part D drug coverage. Quality measures were limited to those available from claims and encounter data, lacking information on patients’ cancer stage. The 18-month measure of survival might not adequately capture survival differences associated with early-stage cancers. The study did not measure whether patient care followed recommended guidelines.
DISCLOSURES:
Various authors reported grants from the National Institute on Aging, the National Institutes of Health, The Commonwealth Fund, Arnold Ventures, the National Cancer Institute, the Department of Defense, and the National Institute of Health Care Management. Additional disclosures are noted in the original article.
This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article first appeared on Medscape.com.
AACR Cancer Progress Report: Big Strides and Big Gaps
The AACR’s 216-page report — an annual endeavor now in its 14th year — focused on the “tremendous” strides made in cancer care, prevention, and early detection and highlighted areas where more research and attention are warranted.
One key area is funding. For the first time since 2016, federal funding for the National Institutes of Health (NIH) and National Cancer Institute (NCI) decreased in the past year. The cuts followed nearly a decade of funding increases that saw the NIH budget expand by nearly $15 billion, and that allowed for a “rapid pace and broad scope” of advances in cancer, AACR’s chief executive officer Margaret Foti, MD, PhD, said during a press briefing.
These recent cuts “threaten to curtail the medical progress seen in recent years and stymie future advancements,” said Dr. Foti, who called on Congress to commit to funding cancer research at significant and consistent levels to “maintain the momentum of progress against cancer.”
Inside the Report: Big Progress
Overall, advances in prevention, early detection, and treatment have helped catch more cancers earlier and save lives.
According to the AACR report, the age-adjusted overall cancer death rate in the United States fell by 33% between 1991 and 2021, meaning about 4.1 million cancer deaths were averted. The overall cancer death rate for children and adolescents has declined by 24% in the past 2 decades. The 5-year relative survival rate for children diagnosed with cancer in the US has improved from 58% for those diagnosed in the mid-1970s to 85% for those diagnosed between 2013 and 2019.
The past fiscal year has seen many new approvals for cancer drugs, diagnostics, and screening tests. From July 1, 2023, to June 30, 2024, the Food and Drug Administration (FDA) approved 15 new anticancer therapeutics, as well as 15 new indications for previously approved agents, one new imaging agent, several artificial intelligence (AI) tools to improve early cancer detection and diagnosis, and two minimally invasive tests for assessing inherited cancer risk or early cancer detection, according to the report.
“Cancer diagnostics are becoming more sophisticated,” AACR president Patricia M. LoRusso, DO, PhD, said during the briefing. “New technologies, such as spatial transcriptomics, are helping us study tumors at a cellular level, and helping to unveil things that we did not initially even begin to understand or think of. AI-based approaches are beginning to transform cancer detection, diagnosis, clinical decision-making, and treatment response monitoring.”
The report also highlights the significant progress in many childhood and adolescent/young adult cancers, Dr. LoRusso noted. These include FDA approvals for two new molecularly targeted therapeutics: tovorafenib for children with certain types of brain tumor and repotrectinib for children with a wide array of cancer types that have a specific genetic alteration known as NTRK gene fusion. It also includes an expanded approval for eflornithine to reduce the risk for relapse in children with high-risk neuroblastoma.
“Decades — decades — of basic research discoveries, have led to these clinical breakthroughs,” she stressed. “These gains against cancer are because of the rapid progress in our ability to decode the cancer genome, which has opened new and innovative avenues for drug development.”
The Gaps
Even with progress in cancer prevention, early detection, and treatment, cancer remains a significant issue.
“In 2024, it is estimated that more than 2 million new cases of cancer will be diagnosed in the United States. More than 611,000 people will die from the disease,” according to the report.
The 2024 report shows that incidence rates for some cancers are increasing in the United States, including vaccine-preventable cancers such as human papillomavirus (HPV)–associated oral cancers and, in young adults, cervical cancers. A recent analysis also found that overall cervical cancer incidence among women aged 30-34 years increased by 2.5% a year between 2012 and 2019.
Furthermore, despite clear evidence demonstrating that the HPV vaccine reduces cervical cancer incidence, uptake has remained poor, with only 38.6% of US children and adolescents aged 9-17 years receiving at least one dose of the vaccine in 2022.
Early-onset cancers are also increasing. Rates of breast, colorectal, and other cancers are on the rise in adults younger than 50 years, the report noted.
The report also pointed to data that 40% of all cancer cases in the United States can be attributed to preventable factors, such as smoking, excess body weight, and alcohol. However, our understanding of these risk factors has improved. Excessive levels of alcohol consumption have, for instance, been shown to increase the risk for six different types of cancer: certain types of head and neck cancer, esophageal squamous cell carcinoma, and breast, colorectal, liver, and stomach cancers.
Financial toxicity remains prevalent as well.
The report explains that financial hardship following a cancer diagnosis is widespread, and the effects can last for years. In fact, more than 40% of patients can spend their entire life savings within the first 2 years of cancer treatment. Among adult survivors of childhood cancers, 20.7% had trouble paying their medical bills, 29.9% said they had been sent to debt collection for unpaid bills, 14.1% had forgone medical care, and 26.8% could not afford nutritious meals.
For young cancer survivors, the lifetime costs associated with a diagnosis of cancer are substantial, reaching an average of $259,324 per person.
On a global level, it is estimated that from 2020 to 2050, the cumulative economic burden of cancer will be $25.2 trillion.
The Path Forward
Despite these challenges, Dr. LoRusso said, “it is unquestionable that we are in a time of unparalleled opportunities in cancer research.
“I am excited about what the future holds for cancer research, and especially for patient care,” she said.
However, funding commitments are needed to avoid impeding this momentum and losing a “talented and creative young workforce” that has brought new ideas and new technologies to the table.
Continued robust funding will help “to markedly improve cancer care, increase cancer survivorship, spur economic growth, and maintain the United States’ position as the global leader in science and medical research,” she added.
The AACR report specifically calls on Congress to:
- Appropriate at least $51.3 billion in fiscal year 2025 for the base budget of the NIH and at least $7.934 billion for the NCI.
- Provide $3.6 billion in dedicated funding for Cancer Moonshot activities through fiscal year 2026 in addition to other funding, consistent with the President’s fiscal year 2025 budget.
- Appropriate at least $472.4 million in fiscal year 2025 for the CDC’s Division of Cancer Prevention to support comprehensive cancer control, central cancer registries, and screening and awareness programs for specific cancers.
- Allocate $55 million in funding for the Oncology Center of Excellence at FDA in fiscal year 2025 to provide regulators with the staff and tools necessary to conduct expedited review of cancer-related medical products.
By working together with Congress and other stakeholders, “we will be able to accelerate the pace of progress and make major strides toward the lifesaving goal of preventing and curing all cancers at the earliest possible time,” Dr. Foti said. “I believe if we do that ... one day we will win this war on cancer.”
A version of this article first appeared on Medscape.com.
The AACR’s 216-page report — an annual endeavor now in its 14th year — focused on the “tremendous” strides made in cancer care, prevention, and early detection and highlighted areas where more research and attention are warranted.
One key area is funding. For the first time since 2016, federal funding for the National Institutes of Health (NIH) and National Cancer Institute (NCI) decreased in the past year. The cuts followed nearly a decade of funding increases that saw the NIH budget expand by nearly $15 billion, and that allowed for a “rapid pace and broad scope” of advances in cancer, AACR’s chief executive officer Margaret Foti, MD, PhD, said during a press briefing.
These recent cuts “threaten to curtail the medical progress seen in recent years and stymie future advancements,” said Dr. Foti, who called on Congress to commit to funding cancer research at significant and consistent levels to “maintain the momentum of progress against cancer.”
Inside the Report: Big Progress
Overall, advances in prevention, early detection, and treatment have helped catch more cancers earlier and save lives.
According to the AACR report, the age-adjusted overall cancer death rate in the United States fell by 33% between 1991 and 2021, meaning about 4.1 million cancer deaths were averted. The overall cancer death rate for children and adolescents has declined by 24% in the past 2 decades. The 5-year relative survival rate for children diagnosed with cancer in the US has improved from 58% for those diagnosed in the mid-1970s to 85% for those diagnosed between 2013 and 2019.
The past fiscal year has seen many new approvals for cancer drugs, diagnostics, and screening tests. From July 1, 2023, to June 30, 2024, the Food and Drug Administration (FDA) approved 15 new anticancer therapeutics, as well as 15 new indications for previously approved agents, one new imaging agent, several artificial intelligence (AI) tools to improve early cancer detection and diagnosis, and two minimally invasive tests for assessing inherited cancer risk or early cancer detection, according to the report.
“Cancer diagnostics are becoming more sophisticated,” AACR president Patricia M. LoRusso, DO, PhD, said during the briefing. “New technologies, such as spatial transcriptomics, are helping us study tumors at a cellular level, and helping to unveil things that we did not initially even begin to understand or think of. AI-based approaches are beginning to transform cancer detection, diagnosis, clinical decision-making, and treatment response monitoring.”
The report also highlights the significant progress in many childhood and adolescent/young adult cancers, Dr. LoRusso noted. These include FDA approvals for two new molecularly targeted therapeutics: tovorafenib for children with certain types of brain tumor and repotrectinib for children with a wide array of cancer types that have a specific genetic alteration known as NTRK gene fusion. It also includes an expanded approval for eflornithine to reduce the risk for relapse in children with high-risk neuroblastoma.
“Decades — decades — of basic research discoveries, have led to these clinical breakthroughs,” she stressed. “These gains against cancer are because of the rapid progress in our ability to decode the cancer genome, which has opened new and innovative avenues for drug development.”
The Gaps
Even with progress in cancer prevention, early detection, and treatment, cancer remains a significant issue.
“In 2024, it is estimated that more than 2 million new cases of cancer will be diagnosed in the United States. More than 611,000 people will die from the disease,” according to the report.
The 2024 report shows that incidence rates for some cancers are increasing in the United States, including vaccine-preventable cancers such as human papillomavirus (HPV)–associated oral cancers and, in young adults, cervical cancers. A recent analysis also found that overall cervical cancer incidence among women aged 30-34 years increased by 2.5% a year between 2012 and 2019.
Furthermore, despite clear evidence demonstrating that the HPV vaccine reduces cervical cancer incidence, uptake has remained poor, with only 38.6% of US children and adolescents aged 9-17 years receiving at least one dose of the vaccine in 2022.
Early-onset cancers are also increasing. Rates of breast, colorectal, and other cancers are on the rise in adults younger than 50 years, the report noted.
The report also pointed to data that 40% of all cancer cases in the United States can be attributed to preventable factors, such as smoking, excess body weight, and alcohol. However, our understanding of these risk factors has improved. Excessive levels of alcohol consumption have, for instance, been shown to increase the risk for six different types of cancer: certain types of head and neck cancer, esophageal squamous cell carcinoma, and breast, colorectal, liver, and stomach cancers.
Financial toxicity remains prevalent as well.
The report explains that financial hardship following a cancer diagnosis is widespread, and the effects can last for years. In fact, more than 40% of patients can spend their entire life savings within the first 2 years of cancer treatment. Among adult survivors of childhood cancers, 20.7% had trouble paying their medical bills, 29.9% said they had been sent to debt collection for unpaid bills, 14.1% had forgone medical care, and 26.8% could not afford nutritious meals.
For young cancer survivors, the lifetime costs associated with a diagnosis of cancer are substantial, reaching an average of $259,324 per person.
On a global level, it is estimated that from 2020 to 2050, the cumulative economic burden of cancer will be $25.2 trillion.
The Path Forward
Despite these challenges, Dr. LoRusso said, “it is unquestionable that we are in a time of unparalleled opportunities in cancer research.
“I am excited about what the future holds for cancer research, and especially for patient care,” she said.
However, funding commitments are needed to avoid impeding this momentum and losing a “talented and creative young workforce” that has brought new ideas and new technologies to the table.
Continued robust funding will help “to markedly improve cancer care, increase cancer survivorship, spur economic growth, and maintain the United States’ position as the global leader in science and medical research,” she added.
The AACR report specifically calls on Congress to:
- Appropriate at least $51.3 billion in fiscal year 2025 for the base budget of the NIH and at least $7.934 billion for the NCI.
- Provide $3.6 billion in dedicated funding for Cancer Moonshot activities through fiscal year 2026 in addition to other funding, consistent with the President’s fiscal year 2025 budget.
- Appropriate at least $472.4 million in fiscal year 2025 for the CDC’s Division of Cancer Prevention to support comprehensive cancer control, central cancer registries, and screening and awareness programs for specific cancers.
- Allocate $55 million in funding for the Oncology Center of Excellence at FDA in fiscal year 2025 to provide regulators with the staff and tools necessary to conduct expedited review of cancer-related medical products.
By working together with Congress and other stakeholders, “we will be able to accelerate the pace of progress and make major strides toward the lifesaving goal of preventing and curing all cancers at the earliest possible time,” Dr. Foti said. “I believe if we do that ... one day we will win this war on cancer.”
A version of this article first appeared on Medscape.com.
The AACR’s 216-page report — an annual endeavor now in its 14th year — focused on the “tremendous” strides made in cancer care, prevention, and early detection and highlighted areas where more research and attention are warranted.
One key area is funding. For the first time since 2016, federal funding for the National Institutes of Health (NIH) and National Cancer Institute (NCI) decreased in the past year. The cuts followed nearly a decade of funding increases that saw the NIH budget expand by nearly $15 billion, and that allowed for a “rapid pace and broad scope” of advances in cancer, AACR’s chief executive officer Margaret Foti, MD, PhD, said during a press briefing.
These recent cuts “threaten to curtail the medical progress seen in recent years and stymie future advancements,” said Dr. Foti, who called on Congress to commit to funding cancer research at significant and consistent levels to “maintain the momentum of progress against cancer.”
Inside the Report: Big Progress
Overall, advances in prevention, early detection, and treatment have helped catch more cancers earlier and save lives.
According to the AACR report, the age-adjusted overall cancer death rate in the United States fell by 33% between 1991 and 2021, meaning about 4.1 million cancer deaths were averted. The overall cancer death rate for children and adolescents has declined by 24% in the past 2 decades. The 5-year relative survival rate for children diagnosed with cancer in the US has improved from 58% for those diagnosed in the mid-1970s to 85% for those diagnosed between 2013 and 2019.
The past fiscal year has seen many new approvals for cancer drugs, diagnostics, and screening tests. From July 1, 2023, to June 30, 2024, the Food and Drug Administration (FDA) approved 15 new anticancer therapeutics, as well as 15 new indications for previously approved agents, one new imaging agent, several artificial intelligence (AI) tools to improve early cancer detection and diagnosis, and two minimally invasive tests for assessing inherited cancer risk or early cancer detection, according to the report.
“Cancer diagnostics are becoming more sophisticated,” AACR president Patricia M. LoRusso, DO, PhD, said during the briefing. “New technologies, such as spatial transcriptomics, are helping us study tumors at a cellular level, and helping to unveil things that we did not initially even begin to understand or think of. AI-based approaches are beginning to transform cancer detection, diagnosis, clinical decision-making, and treatment response monitoring.”
The report also highlights the significant progress in many childhood and adolescent/young adult cancers, Dr. LoRusso noted. These include FDA approvals for two new molecularly targeted therapeutics: tovorafenib for children with certain types of brain tumor and repotrectinib for children with a wide array of cancer types that have a specific genetic alteration known as NTRK gene fusion. It also includes an expanded approval for eflornithine to reduce the risk for relapse in children with high-risk neuroblastoma.
“Decades — decades — of basic research discoveries, have led to these clinical breakthroughs,” she stressed. “These gains against cancer are because of the rapid progress in our ability to decode the cancer genome, which has opened new and innovative avenues for drug development.”
The Gaps
Even with progress in cancer prevention, early detection, and treatment, cancer remains a significant issue.
“In 2024, it is estimated that more than 2 million new cases of cancer will be diagnosed in the United States. More than 611,000 people will die from the disease,” according to the report.
The 2024 report shows that incidence rates for some cancers are increasing in the United States, including vaccine-preventable cancers such as human papillomavirus (HPV)–associated oral cancers and, in young adults, cervical cancers. A recent analysis also found that overall cervical cancer incidence among women aged 30-34 years increased by 2.5% a year between 2012 and 2019.
Furthermore, despite clear evidence demonstrating that the HPV vaccine reduces cervical cancer incidence, uptake has remained poor, with only 38.6% of US children and adolescents aged 9-17 years receiving at least one dose of the vaccine in 2022.
Early-onset cancers are also increasing. Rates of breast, colorectal, and other cancers are on the rise in adults younger than 50 years, the report noted.
The report also pointed to data that 40% of all cancer cases in the United States can be attributed to preventable factors, such as smoking, excess body weight, and alcohol. However, our understanding of these risk factors has improved. Excessive levels of alcohol consumption have, for instance, been shown to increase the risk for six different types of cancer: certain types of head and neck cancer, esophageal squamous cell carcinoma, and breast, colorectal, liver, and stomach cancers.
Financial toxicity remains prevalent as well.
The report explains that financial hardship following a cancer diagnosis is widespread, and the effects can last for years. In fact, more than 40% of patients can spend their entire life savings within the first 2 years of cancer treatment. Among adult survivors of childhood cancers, 20.7% had trouble paying their medical bills, 29.9% said they had been sent to debt collection for unpaid bills, 14.1% had forgone medical care, and 26.8% could not afford nutritious meals.
For young cancer survivors, the lifetime costs associated with a diagnosis of cancer are substantial, reaching an average of $259,324 per person.
On a global level, it is estimated that from 2020 to 2050, the cumulative economic burden of cancer will be $25.2 trillion.
The Path Forward
Despite these challenges, Dr. LoRusso said, “it is unquestionable that we are in a time of unparalleled opportunities in cancer research.
“I am excited about what the future holds for cancer research, and especially for patient care,” she said.
However, funding commitments are needed to avoid impeding this momentum and losing a “talented and creative young workforce” that has brought new ideas and new technologies to the table.
Continued robust funding will help “to markedly improve cancer care, increase cancer survivorship, spur economic growth, and maintain the United States’ position as the global leader in science and medical research,” she added.
The AACR report specifically calls on Congress to:
- Appropriate at least $51.3 billion in fiscal year 2025 for the base budget of the NIH and at least $7.934 billion for the NCI.
- Provide $3.6 billion in dedicated funding for Cancer Moonshot activities through fiscal year 2026 in addition to other funding, consistent with the President’s fiscal year 2025 budget.
- Appropriate at least $472.4 million in fiscal year 2025 for the CDC’s Division of Cancer Prevention to support comprehensive cancer control, central cancer registries, and screening and awareness programs for specific cancers.
- Allocate $55 million in funding for the Oncology Center of Excellence at FDA in fiscal year 2025 to provide regulators with the staff and tools necessary to conduct expedited review of cancer-related medical products.
By working together with Congress and other stakeholders, “we will be able to accelerate the pace of progress and make major strides toward the lifesaving goal of preventing and curing all cancers at the earliest possible time,” Dr. Foti said. “I believe if we do that ... one day we will win this war on cancer.”
A version of this article first appeared on Medscape.com.
Inspection of Deep Tumor Margins for Accurate Cutaneous Squamous Cell Carcinoma Staging
To the Editor:
Histopathologic analysis of debulk specimens in Mohs micrographic surgery (MMS) may augment identification of high-risk factors in cutaneous squamous cell carcinoma (cSCC), which may warrant tumor upstaging.1 Intratumor location has not been studied when looking at these high-risk factors. Herein, we report 4 cSCCs initially categorized as well differentiated that were reclassified as moderate to poorly differentiated on analysis of debulk specimens obtained via shave removal.
An 80-year-old man (patient 1) presented with a tender 2-cm erythematous plaque with dried hemorrhagic crusting on the frontal scalp. He had a history of nonmelanoma skin cancers. A biopsy revealed a well-differentiated cSCC, which was upgraded from a T2a tumor to T2b during MMS due to galea involvement. Debulk analysis revealed moderate to poorly differentiated cSCC, with the least-differentiated cells at the deep margin (Figure 1A). Given T2b staging, baseline imaging and radiation therapy were recommended.
A 75-year-old man (patient 2) presented with a 2-cm erythematous plaque on the left vertex scalp with hemorrhagic crusting, yellow scale, and purulent drainage. He had a history of cSCCs. A biopsy revealed well-differentiated invasive cSCC, which was upgraded from a T2a tumor to T2b during MMS due to tumor extension beyond the subcutaneous fat. Examination of the second Mohs stage revealed moderately differentiated cSCC, with the least-differentiated cells at the deep margin, infiltration beyond the subcutaneous fat, and perineural invasion (Figure 1B). Given T2b staging, baseline imaging and radiation therapy were recommended.
An 86-year-old woman (patient 3) presented with a tender 2.4-cm plum-colored nodule on the right lower leg. She had a history of basal cell carcinoma. A biopsy revealed a well-differentiated invasive cSCC staged at T2a. Debulk analysis revealed moderately differentiated cSCC, with the least-differentiated cells at the deep margin, though the staging remained the same (Figure 1C).
An 82-year-old man (patient 4) presented with a 2.7-cm ulcerated nodule with adjacent scaling on the vertex scalp. He had no history of skin cancer. A biopsy revealed a well-differentiated cSCC (Figure 2) that was upgraded from a T2a tumor to T2b during MMS due to tumor extension beyond the subcutaneous fat. Debulk analysis revealed moderate to poorly differentiated cSCC, with the least-differentiated cells with single-cell extension at the deep margin in the galea (Figure 1D). Given T2b staging, baseline imaging and radiation therapy were recommended.
Tumor differentiation is a factor included in the Brigham and Women’s Hospital staging system, and intratumor variability can be clinically relevant for tumor staging.1 Specifically, cSCCs may exhibit intratumor heterogeneity in which predominantly well-differentiated tumors contain focal areas of poorer differentiation.2 This intratumor heterogeneity complicates estimation of tumor risk, as a well-differentiated tumor on biopsy may exhibit poor differentiation at a deeper margin. Our cases highlight that the cells at the deeper margin indeed can show poorer differentiation or other higher-risk tumor features. Thus, the most clinically relevant cells for tumor staging and prognostication may not be visible on initial biopsy, underscoring the utility of close examination of the deep layer of the debulk specimen and Mohs layer for comprehensive staging.
Genetic studies have attempted to identify gene expression patterns in cSCCs that predispose to invasion.3 Three of the top 6 genes in this “invasion signature gene set” were matrix metalloproteases; additionally, IL-24 messenger RNA was upregulated in both the cSCC invasion front and in situ cSCCs. IL-24 has been shown to upregulate the expression of matrix metalloprotease 7 in vitro, suggesting that it may influence tumor progression.3 Although gene expression was not included in this series, the identification of genetic variability in the most poorly differentiated cells residing in the deep margins is of great interest and may reveal mutations contributing to irregular cell morphology and cSCC invasiveness.
Prior studies have indicated that a proportion of cSCCs are histopathologically upgraded from the initial biopsy during MMS due to evidence of perineural invasion, bony invasion, or lesser differentiation noted during MMS stages or debulk analysis.1,4 However, the majority of Mohs surgeons report immediately discarding debulk specimens without further evaluation.5 Herein, we highlight 4 cSCC cases in which the deep margins of the debulk specimen contained the most dedifferentiated cells. Our findings emphasize the importance of thoroughly examining deep tumor margins for complete staging yet also highlight that identifying cells at these margins may not change patient management when high-risk criteria are already met.
- McIlwee BE, Abidi NY, Ravi M, et al. Utility of debulk specimens during Mohs micrographic surgery for cutaneous squamous cell carcinoma. Dermatol Surg. 2021;47:599-604.
- Ramón y Cajal S, Sesé M, Capdevila C, et al. Clinical implications of intratumor heterogeneity: challenges and opportunities. J Mol Med. 2020;98:161-177.
- Mitsui H, Suárez-Fariñas M, Gulati N, et al. Gene expression profiling of the leading edge of cutaneous squamous cell carcinoma: IL-24-driven MMP-7. J Invest Dermatol. 2014;134:1418-1427.
- Chung E, Hoang S, McEvoy AM, et al. Histopathologic upgrading of cutaneous squamous cell carcinomas during Mohs micrographic surgery: a retrospective cohort study. J Am Acad Dermatol. 2021;85:923-930.
- Alniemi DT, Swanson AM, Lasarev M, et al. Tumor debulking trends for keratinocyte carcinomas among Mohs surgeons. Dermatol Surg. 2021;47:1660-1661.
To the Editor:
Histopathologic analysis of debulk specimens in Mohs micrographic surgery (MMS) may augment identification of high-risk factors in cutaneous squamous cell carcinoma (cSCC), which may warrant tumor upstaging.1 Intratumor location has not been studied when looking at these high-risk factors. Herein, we report 4 cSCCs initially categorized as well differentiated that were reclassified as moderate to poorly differentiated on analysis of debulk specimens obtained via shave removal.
An 80-year-old man (patient 1) presented with a tender 2-cm erythematous plaque with dried hemorrhagic crusting on the frontal scalp. He had a history of nonmelanoma skin cancers. A biopsy revealed a well-differentiated cSCC, which was upgraded from a T2a tumor to T2b during MMS due to galea involvement. Debulk analysis revealed moderate to poorly differentiated cSCC, with the least-differentiated cells at the deep margin (Figure 1A). Given T2b staging, baseline imaging and radiation therapy were recommended.
A 75-year-old man (patient 2) presented with a 2-cm erythematous plaque on the left vertex scalp with hemorrhagic crusting, yellow scale, and purulent drainage. He had a history of cSCCs. A biopsy revealed well-differentiated invasive cSCC, which was upgraded from a T2a tumor to T2b during MMS due to tumor extension beyond the subcutaneous fat. Examination of the second Mohs stage revealed moderately differentiated cSCC, with the least-differentiated cells at the deep margin, infiltration beyond the subcutaneous fat, and perineural invasion (Figure 1B). Given T2b staging, baseline imaging and radiation therapy were recommended.
An 86-year-old woman (patient 3) presented with a tender 2.4-cm plum-colored nodule on the right lower leg. She had a history of basal cell carcinoma. A biopsy revealed a well-differentiated invasive cSCC staged at T2a. Debulk analysis revealed moderately differentiated cSCC, with the least-differentiated cells at the deep margin, though the staging remained the same (Figure 1C).
An 82-year-old man (patient 4) presented with a 2.7-cm ulcerated nodule with adjacent scaling on the vertex scalp. He had no history of skin cancer. A biopsy revealed a well-differentiated cSCC (Figure 2) that was upgraded from a T2a tumor to T2b during MMS due to tumor extension beyond the subcutaneous fat. Debulk analysis revealed moderate to poorly differentiated cSCC, with the least-differentiated cells with single-cell extension at the deep margin in the galea (Figure 1D). Given T2b staging, baseline imaging and radiation therapy were recommended.
Tumor differentiation is a factor included in the Brigham and Women’s Hospital staging system, and intratumor variability can be clinically relevant for tumor staging.1 Specifically, cSCCs may exhibit intratumor heterogeneity in which predominantly well-differentiated tumors contain focal areas of poorer differentiation.2 This intratumor heterogeneity complicates estimation of tumor risk, as a well-differentiated tumor on biopsy may exhibit poor differentiation at a deeper margin. Our cases highlight that the cells at the deeper margin indeed can show poorer differentiation or other higher-risk tumor features. Thus, the most clinically relevant cells for tumor staging and prognostication may not be visible on initial biopsy, underscoring the utility of close examination of the deep layer of the debulk specimen and Mohs layer for comprehensive staging.
Genetic studies have attempted to identify gene expression patterns in cSCCs that predispose to invasion.3 Three of the top 6 genes in this “invasion signature gene set” were matrix metalloproteases; additionally, IL-24 messenger RNA was upregulated in both the cSCC invasion front and in situ cSCCs. IL-24 has been shown to upregulate the expression of matrix metalloprotease 7 in vitro, suggesting that it may influence tumor progression.3 Although gene expression was not included in this series, the identification of genetic variability in the most poorly differentiated cells residing in the deep margins is of great interest and may reveal mutations contributing to irregular cell morphology and cSCC invasiveness.
Prior studies have indicated that a proportion of cSCCs are histopathologically upgraded from the initial biopsy during MMS due to evidence of perineural invasion, bony invasion, or lesser differentiation noted during MMS stages or debulk analysis.1,4 However, the majority of Mohs surgeons report immediately discarding debulk specimens without further evaluation.5 Herein, we highlight 4 cSCC cases in which the deep margins of the debulk specimen contained the most dedifferentiated cells. Our findings emphasize the importance of thoroughly examining deep tumor margins for complete staging yet also highlight that identifying cells at these margins may not change patient management when high-risk criteria are already met.
To the Editor:
Histopathologic analysis of debulk specimens in Mohs micrographic surgery (MMS) may augment identification of high-risk factors in cutaneous squamous cell carcinoma (cSCC), which may warrant tumor upstaging.1 Intratumor location has not been studied when looking at these high-risk factors. Herein, we report 4 cSCCs initially categorized as well differentiated that were reclassified as moderate to poorly differentiated on analysis of debulk specimens obtained via shave removal.
An 80-year-old man (patient 1) presented with a tender 2-cm erythematous plaque with dried hemorrhagic crusting on the frontal scalp. He had a history of nonmelanoma skin cancers. A biopsy revealed a well-differentiated cSCC, which was upgraded from a T2a tumor to T2b during MMS due to galea involvement. Debulk analysis revealed moderate to poorly differentiated cSCC, with the least-differentiated cells at the deep margin (Figure 1A). Given T2b staging, baseline imaging and radiation therapy were recommended.
A 75-year-old man (patient 2) presented with a 2-cm erythematous plaque on the left vertex scalp with hemorrhagic crusting, yellow scale, and purulent drainage. He had a history of cSCCs. A biopsy revealed well-differentiated invasive cSCC, which was upgraded from a T2a tumor to T2b during MMS due to tumor extension beyond the subcutaneous fat. Examination of the second Mohs stage revealed moderately differentiated cSCC, with the least-differentiated cells at the deep margin, infiltration beyond the subcutaneous fat, and perineural invasion (Figure 1B). Given T2b staging, baseline imaging and radiation therapy were recommended.
An 86-year-old woman (patient 3) presented with a tender 2.4-cm plum-colored nodule on the right lower leg. She had a history of basal cell carcinoma. A biopsy revealed a well-differentiated invasive cSCC staged at T2a. Debulk analysis revealed moderately differentiated cSCC, with the least-differentiated cells at the deep margin, though the staging remained the same (Figure 1C).
An 82-year-old man (patient 4) presented with a 2.7-cm ulcerated nodule with adjacent scaling on the vertex scalp. He had no history of skin cancer. A biopsy revealed a well-differentiated cSCC (Figure 2) that was upgraded from a T2a tumor to T2b during MMS due to tumor extension beyond the subcutaneous fat. Debulk analysis revealed moderate to poorly differentiated cSCC, with the least-differentiated cells with single-cell extension at the deep margin in the galea (Figure 1D). Given T2b staging, baseline imaging and radiation therapy were recommended.
Tumor differentiation is a factor included in the Brigham and Women’s Hospital staging system, and intratumor variability can be clinically relevant for tumor staging.1 Specifically, cSCCs may exhibit intratumor heterogeneity in which predominantly well-differentiated tumors contain focal areas of poorer differentiation.2 This intratumor heterogeneity complicates estimation of tumor risk, as a well-differentiated tumor on biopsy may exhibit poor differentiation at a deeper margin. Our cases highlight that the cells at the deeper margin indeed can show poorer differentiation or other higher-risk tumor features. Thus, the most clinically relevant cells for tumor staging and prognostication may not be visible on initial biopsy, underscoring the utility of close examination of the deep layer of the debulk specimen and Mohs layer for comprehensive staging.
Genetic studies have attempted to identify gene expression patterns in cSCCs that predispose to invasion.3 Three of the top 6 genes in this “invasion signature gene set” were matrix metalloproteases; additionally, IL-24 messenger RNA was upregulated in both the cSCC invasion front and in situ cSCCs. IL-24 has been shown to upregulate the expression of matrix metalloprotease 7 in vitro, suggesting that it may influence tumor progression.3 Although gene expression was not included in this series, the identification of genetic variability in the most poorly differentiated cells residing in the deep margins is of great interest and may reveal mutations contributing to irregular cell morphology and cSCC invasiveness.
Prior studies have indicated that a proportion of cSCCs are histopathologically upgraded from the initial biopsy during MMS due to evidence of perineural invasion, bony invasion, or lesser differentiation noted during MMS stages or debulk analysis.1,4 However, the majority of Mohs surgeons report immediately discarding debulk specimens without further evaluation.5 Herein, we highlight 4 cSCC cases in which the deep margins of the debulk specimen contained the most dedifferentiated cells. Our findings emphasize the importance of thoroughly examining deep tumor margins for complete staging yet also highlight that identifying cells at these margins may not change patient management when high-risk criteria are already met.
- McIlwee BE, Abidi NY, Ravi M, et al. Utility of debulk specimens during Mohs micrographic surgery for cutaneous squamous cell carcinoma. Dermatol Surg. 2021;47:599-604.
- Ramón y Cajal S, Sesé M, Capdevila C, et al. Clinical implications of intratumor heterogeneity: challenges and opportunities. J Mol Med. 2020;98:161-177.
- Mitsui H, Suárez-Fariñas M, Gulati N, et al. Gene expression profiling of the leading edge of cutaneous squamous cell carcinoma: IL-24-driven MMP-7. J Invest Dermatol. 2014;134:1418-1427.
- Chung E, Hoang S, McEvoy AM, et al. Histopathologic upgrading of cutaneous squamous cell carcinomas during Mohs micrographic surgery: a retrospective cohort study. J Am Acad Dermatol. 2021;85:923-930.
- Alniemi DT, Swanson AM, Lasarev M, et al. Tumor debulking trends for keratinocyte carcinomas among Mohs surgeons. Dermatol Surg. 2021;47:1660-1661.
- McIlwee BE, Abidi NY, Ravi M, et al. Utility of debulk specimens during Mohs micrographic surgery for cutaneous squamous cell carcinoma. Dermatol Surg. 2021;47:599-604.
- Ramón y Cajal S, Sesé M, Capdevila C, et al. Clinical implications of intratumor heterogeneity: challenges and opportunities. J Mol Med. 2020;98:161-177.
- Mitsui H, Suárez-Fariñas M, Gulati N, et al. Gene expression profiling of the leading edge of cutaneous squamous cell carcinoma: IL-24-driven MMP-7. J Invest Dermatol. 2014;134:1418-1427.
- Chung E, Hoang S, McEvoy AM, et al. Histopathologic upgrading of cutaneous squamous cell carcinomas during Mohs micrographic surgery: a retrospective cohort study. J Am Acad Dermatol. 2021;85:923-930.
- Alniemi DT, Swanson AM, Lasarev M, et al. Tumor debulking trends for keratinocyte carcinomas among Mohs surgeons. Dermatol Surg. 2021;47:1660-1661.
Practice Points
- A proportion of cutaneous squamous cell carcinomas are upgraded from the initial biopsy during Mohs micrographic surgery due to evidence of perineural invasion, bony invasion, or lesser differentiation noted on Mohs stages or debulk analysis.
- Thorough inspection of the deep tumor margins may be required for accurate tumor staging and evaluation of metastatic risk. Cells at the deep margin of the tumor may demonstrate poorer differentiation and/or other higher-risk tumor features than those closer to the surface.
- Tumor staging may be incomplete until the deep margins are assessed to find the most dysplastic and likely clinically relevant cells, which may be missed without evaluation of the debulked tumor.
Transient Eruption of Verrucous Keratoses During Encorafenib Therapy: Adverse Event or Paraneoplastic Phenomenon?
To the Editor:
Mutations of the BRAF protein kinase gene are implicated in a variety of malignancies.1BRAF mutations in malignancies cause the mitogen-activated protein kinase (MAPK) pathway to become constitutively active, which results in unchecked cellular proliferation,2,3 making the BRAF mutation an attractive target for inhibition with pharmacologic agents to potentially halt cancer growth.4 Vemurafenib—the first selective BRAF inhibitor used in clinical practice—initially was approved by the US Food and Drug Administration in 2011. The approval of dabrafenib followed in 2013 and most recently encorafenib in 2018.5
Although targeted treatment of BRAF-mutated malignancies with BRAF inhibitors has become common, it often is associated with cutaneous adverse events (AEs), such as rash, pruritus, photosensitivity, actinic keratosis, and verrucous keratosis. Some reports demonstrate these events in up to 95% of patients undergoing BRAF inhibitor treatment.6 In several cases the eruption of verrucous keratoses is among the most common cutaneous AEs seen among patients receiving BRAF inhibitor treatment.5-7
In general, lesions can appear days to months after therapy is initiated and may resolve after switching to dual therapy with a MEK inhibitor or with complete cessation of BRAF inhibitor therapy.5,7,8 One case of spontaneous resolution of vemurafenib-associated panniculitis during ongoing BRAF inhibitor therapy has been reported9; however, spontaneous resolution of cutaneous AEs is uncommon. Herein, we describe verrucous keratoses in a patient undergoing treatment with encorafenib that resolved spontaneously despite ongoing BRAF inhibitor therapy.
A 61-year-old woman presented to the emergency department with pain in the right lower quadrant. Computed tomography (CT) of the abdomen and pelvis revealed a large ovarian mass. Subsequent bloodwork revealed elevated carcinoembryonic antigen levels. The patient underwent a hysterectomy, bilateral salpingo-oophorectomy, omentectomy, right hemicolectomy with ileotransverse side-to-side anastomosis, right pelvic lymph node reduction, and complete cytoreduction. Histopathology revealed an adenocarcinoma of the cecum with tumor invasion into the visceral peritoneum and metastases to the left ovary, fallopian tube, and omentum. A BRAF V600E mutation was detected.
Two months after the initial presentation, the patient started her first cycle of chemotherapy with a combination of folinic acid, fluorouracil, and oxaliplatin. She completed 11 cycles of this regimen, then was switched to capecitabine and oxaliplatin for an additional 2 cycles due to insurance concerns. At the end of treatment, there was no evidence of disease on CT, thus the patient was followed with observation. However, she presented 10 months later to the emergency department with abdominal pain, and CT revealed new lesions in the liver that were concerning for potential metastases. She started oral encorafenib 300 mg/d and intravenous cetuximab 500 mg weekly; after 1 week, encorafenib was reduced to 150 mg/d due to nausea and loss of appetite. Within 2 weeks of starting treatment, the patient reported the relatively abrupt appearance of more than 50 small papules across the shoulders and back (Figure 1A). She was referred to dermatology, and shave biopsies of 2 lesions—one from the left anterior thigh, the other from the right posterior shoulder—revealed verrucous keratosis pathology (Figure 2). At this time, encorafenib was increased again to 300 mg/d as the patient had been tolerating the reduced dose. She continued to report the appearance of new lesions for the next 3 months, after which the lesions were stable for approximately 2 months. By 2.5 months after initiation of therapy, the patient had undergone CT demonstrating resolution of the liver lesions. At 5 months of therapy, the patient reported a stable to slightly reduced number of skin lesions but had begun to experience worsening joint pain, and the dosage of encorafenib was reduced to 225 mg/d. At 7 months of therapy, the dosage was further reduced to 150 mg/d due to persistent arthralgia. A follow-up examination at 10 months of therapy showed improvement in the number and size of the verrucous keratoses, and near resolution was seen by 14 months after the initial onset of the lesions (Figure 1B). At 20 months after initial onset, only 1 remaining verrucous keratosis was identified on physical examination and biopsy. The patient had continued a regimen of encorafenib 150 mg/d and weekly intravenous 500 mg cetuximab up to this point. Over the entire time period that the patient was seen, up to 12 lesions located in high-friction areas had become irritated and were treated with cryotherapy, but this contributed only minorly to the patient’s overall presentation.
Verrucous keratosis is a known cutaneous AE of BRAF inhibitor treatment with vemurafenib and dabrafenib, with fewer cases attributed to encorafenib.5,6 Within the oncologic setting, the eruption of verrucous papules as a paraneoplastic phenomenon is heavily debated in the literature and is known as the Leser-Trélat sign. This phenomenon is commonly associated with adenocarcinomas of the gastrointestinal tract, as seen in our patient.10 Based on Curth’s postulates—the criteria used to evaluate the relationship between an internal malignancy and a cutaneous disorder—this was unlikely in our patient. The criteria, which do not all need to be met to suggest a paraneoplastic phenomenon, include concurrent onset of the malignancy and the dermatosis, parallel course, association of a specific dermatosis with a specific malignancy, statistical significance of the association, and the presence of a genetic basis for the association.11 Several features favored a drug-related cutaneous eruption vs a paraneoplastic phenomenon: (1) the malignancy was identified months before the cutaneous eruptions manifested; (2) the cutaneous lesions appeared once treatment had already been initiated; and (3) the cutaneous lesions persisted long after the malignancy was no longer identifiable on CT. Indeed, eruption of the papules temporally coincided closely with the initiation of BRAF inhibitor therapy, arguing for correlation.
As a suspected BRAF inhibitor–associated cutaneous AE, the eruption of verrucous keratoses in our patient is remarkable for its spontaneous resolution despite ongoing therapy. It is speculated that keratinocytic proliferation while on BRAF inhibitor therapy may be caused by a paradoxical increase in signaling through CRAF, another Raf isoform that plays a role in the induction of terminal differentiation of keratinocytes, with a subsequent increase in MAPK signaling.12-14 Self-resolution of this cycle despite continuing BRAF inhibitor therapy suggests the possible involvement of balancing and/or alternative mechanistic pathways that may be related to the immune system. Although verrucous keratoses are considered benign proliferations and do not necessarily require any specific treatment or reduction in BRAF inhibitor dosage, they may be treated with cryotherapy, electrocautery, shave removal, or excision,15 which often is done if the lesions become inflamed and cause pain. Additionally, some patients may feel distress from the appearance of the lesions and desire treatment for this reason. Understanding that verrucous keratoses can be a transient cutaneous AE rather than a persistent one may be useful to clinicians as they manage AEs during BRAF inhibitor therapy.
- Pakneshan S, Salajegheh A, Smith RA, Lam AK. Clinicopathological relevance of BRAF mutations in human cancer. Pathology. 2013;45:346-356. doi:10.1097/PAT.0b013e328360b61d
- Dhomen N, Marais R. BRAF signaling and targeted therapies in melanoma. Hematol Oncol Clin North Am. 2009;23:529-545. doi:10.1016/j.hoc.2009.04.001
- Long GV, Menzies AM, Nagrial AM, et al. Prognostic and clinicopathologic associations of oncogenic BRAF in metastatic melanoma. J Clin Oncol. 2011;29:1239-1246. doi:10.1200/JCO.2010.32.4327
- Ji Z, Flaherty KT, Tsao H. Targeting the RAS pathway in melanoma. Trends Mol Med. 2012;18:27-35. doi:10.1016/j.molmed.2011.08.001
- Gouda MA, Subbiah V. Precision oncology for BRAF-mutant cancers with BRAF and MEK inhibitors: from melanoma to tissue-agnostic therapy. ESMO Open. 2023;8:100788. doi:10.1016/j.esmoop.2023.100788
- Gençler B, Gönül M. Cutaneous side effects of BRAF inhibitors in advanced melanoma: review of the literature. Dermatol Res Pract. 2016;2016:5361569. doi:10.1155/2016/5361569.
- Chu EY, Wanat KA, Miller CJ, et al. Diverse cutaneous side effects associated with BRAF inhibitor therapy: a clinicopathologic study. J Am Acad Dermatol. 2012;67:1265-1272. doi:10.1016/j.jaad.2012.04.008
- Naqash AR, File DM, Ziemer CM, et al. Cutaneous adverse reactions in B-RAF positive metastatic melanoma following sequential treatment with B-RAF/MEK inhibitors and immune checkpoint blockade or vice versa. a single-institutional case-series. J Immunother Cancer. 2019;7:4. doi:10.1186/s40425-018-0475-y
- Maldonado-Seral C, Berros-Fombella JP, Vivanco-Allende B, et al. Vemurafenib-associated neutrophilic panniculitis: an emergent adverse effect of variable severity. Dermatol Online J. 2013;19:16. doi:10.5070/d370x41670
- Mirali S, Mufti A, Lansang RP, et al. Eruptive seborrheic keratoses are associated with a co-occurring malignancy in the majority of reported cases: a systematic review. J Cutan Med Surg. 2022;26:57-62. doi:10.1177/12034754211035124
- Thiers BH, Sahn RE, Callen JP. Cutaneous manifestations of internal malignancy. CA Cancer J Clin. 2009;59:73-98. doi:10.3322/caac.20005
- Hatzivassiliou G, Song K, Yen I, et al. RAF inhibitors prime wild-type RAF to activate the MAPK pathway and enhance growth. Nature. 2010;464:431-435. doi:10.1038/nature08833
- Heidorn SJ, Milagre C, Whittaker S, et al. Kinase-dead BRAF and oncogenic RAS cooperate to drive tumor progression through CRAF. Cell. 2010;140:209-221. doi:10.1016/j.cell.2009.12.040
- Poulikakos PI, Zhang C, Bollag G, et al. RAF inhibitors transactivate RAF dimers and ERK signaling in cells with wild-type BRAF. Nature. 2010;464:427-430. doi:10.1038/nature08902
- Hayat MA. Brain Metastases from Primary Tumors, Volume 3: Epidemiology, Biology, and Therapy of Melanoma and Other Cancers. Academic Press; 2016.
To the Editor:
Mutations of the BRAF protein kinase gene are implicated in a variety of malignancies.1BRAF mutations in malignancies cause the mitogen-activated protein kinase (MAPK) pathway to become constitutively active, which results in unchecked cellular proliferation,2,3 making the BRAF mutation an attractive target for inhibition with pharmacologic agents to potentially halt cancer growth.4 Vemurafenib—the first selective BRAF inhibitor used in clinical practice—initially was approved by the US Food and Drug Administration in 2011. The approval of dabrafenib followed in 2013 and most recently encorafenib in 2018.5
Although targeted treatment of BRAF-mutated malignancies with BRAF inhibitors has become common, it often is associated with cutaneous adverse events (AEs), such as rash, pruritus, photosensitivity, actinic keratosis, and verrucous keratosis. Some reports demonstrate these events in up to 95% of patients undergoing BRAF inhibitor treatment.6 In several cases the eruption of verrucous keratoses is among the most common cutaneous AEs seen among patients receiving BRAF inhibitor treatment.5-7
In general, lesions can appear days to months after therapy is initiated and may resolve after switching to dual therapy with a MEK inhibitor or with complete cessation of BRAF inhibitor therapy.5,7,8 One case of spontaneous resolution of vemurafenib-associated panniculitis during ongoing BRAF inhibitor therapy has been reported9; however, spontaneous resolution of cutaneous AEs is uncommon. Herein, we describe verrucous keratoses in a patient undergoing treatment with encorafenib that resolved spontaneously despite ongoing BRAF inhibitor therapy.
A 61-year-old woman presented to the emergency department with pain in the right lower quadrant. Computed tomography (CT) of the abdomen and pelvis revealed a large ovarian mass. Subsequent bloodwork revealed elevated carcinoembryonic antigen levels. The patient underwent a hysterectomy, bilateral salpingo-oophorectomy, omentectomy, right hemicolectomy with ileotransverse side-to-side anastomosis, right pelvic lymph node reduction, and complete cytoreduction. Histopathology revealed an adenocarcinoma of the cecum with tumor invasion into the visceral peritoneum and metastases to the left ovary, fallopian tube, and omentum. A BRAF V600E mutation was detected.
Two months after the initial presentation, the patient started her first cycle of chemotherapy with a combination of folinic acid, fluorouracil, and oxaliplatin. She completed 11 cycles of this regimen, then was switched to capecitabine and oxaliplatin for an additional 2 cycles due to insurance concerns. At the end of treatment, there was no evidence of disease on CT, thus the patient was followed with observation. However, she presented 10 months later to the emergency department with abdominal pain, and CT revealed new lesions in the liver that were concerning for potential metastases. She started oral encorafenib 300 mg/d and intravenous cetuximab 500 mg weekly; after 1 week, encorafenib was reduced to 150 mg/d due to nausea and loss of appetite. Within 2 weeks of starting treatment, the patient reported the relatively abrupt appearance of more than 50 small papules across the shoulders and back (Figure 1A). She was referred to dermatology, and shave biopsies of 2 lesions—one from the left anterior thigh, the other from the right posterior shoulder—revealed verrucous keratosis pathology (Figure 2). At this time, encorafenib was increased again to 300 mg/d as the patient had been tolerating the reduced dose. She continued to report the appearance of new lesions for the next 3 months, after which the lesions were stable for approximately 2 months. By 2.5 months after initiation of therapy, the patient had undergone CT demonstrating resolution of the liver lesions. At 5 months of therapy, the patient reported a stable to slightly reduced number of skin lesions but had begun to experience worsening joint pain, and the dosage of encorafenib was reduced to 225 mg/d. At 7 months of therapy, the dosage was further reduced to 150 mg/d due to persistent arthralgia. A follow-up examination at 10 months of therapy showed improvement in the number and size of the verrucous keratoses, and near resolution was seen by 14 months after the initial onset of the lesions (Figure 1B). At 20 months after initial onset, only 1 remaining verrucous keratosis was identified on physical examination and biopsy. The patient had continued a regimen of encorafenib 150 mg/d and weekly intravenous 500 mg cetuximab up to this point. Over the entire time period that the patient was seen, up to 12 lesions located in high-friction areas had become irritated and were treated with cryotherapy, but this contributed only minorly to the patient’s overall presentation.
Verrucous keratosis is a known cutaneous AE of BRAF inhibitor treatment with vemurafenib and dabrafenib, with fewer cases attributed to encorafenib.5,6 Within the oncologic setting, the eruption of verrucous papules as a paraneoplastic phenomenon is heavily debated in the literature and is known as the Leser-Trélat sign. This phenomenon is commonly associated with adenocarcinomas of the gastrointestinal tract, as seen in our patient.10 Based on Curth’s postulates—the criteria used to evaluate the relationship between an internal malignancy and a cutaneous disorder—this was unlikely in our patient. The criteria, which do not all need to be met to suggest a paraneoplastic phenomenon, include concurrent onset of the malignancy and the dermatosis, parallel course, association of a specific dermatosis with a specific malignancy, statistical significance of the association, and the presence of a genetic basis for the association.11 Several features favored a drug-related cutaneous eruption vs a paraneoplastic phenomenon: (1) the malignancy was identified months before the cutaneous eruptions manifested; (2) the cutaneous lesions appeared once treatment had already been initiated; and (3) the cutaneous lesions persisted long after the malignancy was no longer identifiable on CT. Indeed, eruption of the papules temporally coincided closely with the initiation of BRAF inhibitor therapy, arguing for correlation.
As a suspected BRAF inhibitor–associated cutaneous AE, the eruption of verrucous keratoses in our patient is remarkable for its spontaneous resolution despite ongoing therapy. It is speculated that keratinocytic proliferation while on BRAF inhibitor therapy may be caused by a paradoxical increase in signaling through CRAF, another Raf isoform that plays a role in the induction of terminal differentiation of keratinocytes, with a subsequent increase in MAPK signaling.12-14 Self-resolution of this cycle despite continuing BRAF inhibitor therapy suggests the possible involvement of balancing and/or alternative mechanistic pathways that may be related to the immune system. Although verrucous keratoses are considered benign proliferations and do not necessarily require any specific treatment or reduction in BRAF inhibitor dosage, they may be treated with cryotherapy, electrocautery, shave removal, or excision,15 which often is done if the lesions become inflamed and cause pain. Additionally, some patients may feel distress from the appearance of the lesions and desire treatment for this reason. Understanding that verrucous keratoses can be a transient cutaneous AE rather than a persistent one may be useful to clinicians as they manage AEs during BRAF inhibitor therapy.
To the Editor:
Mutations of the BRAF protein kinase gene are implicated in a variety of malignancies.1BRAF mutations in malignancies cause the mitogen-activated protein kinase (MAPK) pathway to become constitutively active, which results in unchecked cellular proliferation,2,3 making the BRAF mutation an attractive target for inhibition with pharmacologic agents to potentially halt cancer growth.4 Vemurafenib—the first selective BRAF inhibitor used in clinical practice—initially was approved by the US Food and Drug Administration in 2011. The approval of dabrafenib followed in 2013 and most recently encorafenib in 2018.5
Although targeted treatment of BRAF-mutated malignancies with BRAF inhibitors has become common, it often is associated with cutaneous adverse events (AEs), such as rash, pruritus, photosensitivity, actinic keratosis, and verrucous keratosis. Some reports demonstrate these events in up to 95% of patients undergoing BRAF inhibitor treatment.6 In several cases the eruption of verrucous keratoses is among the most common cutaneous AEs seen among patients receiving BRAF inhibitor treatment.5-7
In general, lesions can appear days to months after therapy is initiated and may resolve after switching to dual therapy with a MEK inhibitor or with complete cessation of BRAF inhibitor therapy.5,7,8 One case of spontaneous resolution of vemurafenib-associated panniculitis during ongoing BRAF inhibitor therapy has been reported9; however, spontaneous resolution of cutaneous AEs is uncommon. Herein, we describe verrucous keratoses in a patient undergoing treatment with encorafenib that resolved spontaneously despite ongoing BRAF inhibitor therapy.
A 61-year-old woman presented to the emergency department with pain in the right lower quadrant. Computed tomography (CT) of the abdomen and pelvis revealed a large ovarian mass. Subsequent bloodwork revealed elevated carcinoembryonic antigen levels. The patient underwent a hysterectomy, bilateral salpingo-oophorectomy, omentectomy, right hemicolectomy with ileotransverse side-to-side anastomosis, right pelvic lymph node reduction, and complete cytoreduction. Histopathology revealed an adenocarcinoma of the cecum with tumor invasion into the visceral peritoneum and metastases to the left ovary, fallopian tube, and omentum. A BRAF V600E mutation was detected.
Two months after the initial presentation, the patient started her first cycle of chemotherapy with a combination of folinic acid, fluorouracil, and oxaliplatin. She completed 11 cycles of this regimen, then was switched to capecitabine and oxaliplatin for an additional 2 cycles due to insurance concerns. At the end of treatment, there was no evidence of disease on CT, thus the patient was followed with observation. However, she presented 10 months later to the emergency department with abdominal pain, and CT revealed new lesions in the liver that were concerning for potential metastases. She started oral encorafenib 300 mg/d and intravenous cetuximab 500 mg weekly; after 1 week, encorafenib was reduced to 150 mg/d due to nausea and loss of appetite. Within 2 weeks of starting treatment, the patient reported the relatively abrupt appearance of more than 50 small papules across the shoulders and back (Figure 1A). She was referred to dermatology, and shave biopsies of 2 lesions—one from the left anterior thigh, the other from the right posterior shoulder—revealed verrucous keratosis pathology (Figure 2). At this time, encorafenib was increased again to 300 mg/d as the patient had been tolerating the reduced dose. She continued to report the appearance of new lesions for the next 3 months, after which the lesions were stable for approximately 2 months. By 2.5 months after initiation of therapy, the patient had undergone CT demonstrating resolution of the liver lesions. At 5 months of therapy, the patient reported a stable to slightly reduced number of skin lesions but had begun to experience worsening joint pain, and the dosage of encorafenib was reduced to 225 mg/d. At 7 months of therapy, the dosage was further reduced to 150 mg/d due to persistent arthralgia. A follow-up examination at 10 months of therapy showed improvement in the number and size of the verrucous keratoses, and near resolution was seen by 14 months after the initial onset of the lesions (Figure 1B). At 20 months after initial onset, only 1 remaining verrucous keratosis was identified on physical examination and biopsy. The patient had continued a regimen of encorafenib 150 mg/d and weekly intravenous 500 mg cetuximab up to this point. Over the entire time period that the patient was seen, up to 12 lesions located in high-friction areas had become irritated and were treated with cryotherapy, but this contributed only minorly to the patient’s overall presentation.
Verrucous keratosis is a known cutaneous AE of BRAF inhibitor treatment with vemurafenib and dabrafenib, with fewer cases attributed to encorafenib.5,6 Within the oncologic setting, the eruption of verrucous papules as a paraneoplastic phenomenon is heavily debated in the literature and is known as the Leser-Trélat sign. This phenomenon is commonly associated with adenocarcinomas of the gastrointestinal tract, as seen in our patient.10 Based on Curth’s postulates—the criteria used to evaluate the relationship between an internal malignancy and a cutaneous disorder—this was unlikely in our patient. The criteria, which do not all need to be met to suggest a paraneoplastic phenomenon, include concurrent onset of the malignancy and the dermatosis, parallel course, association of a specific dermatosis with a specific malignancy, statistical significance of the association, and the presence of a genetic basis for the association.11 Several features favored a drug-related cutaneous eruption vs a paraneoplastic phenomenon: (1) the malignancy was identified months before the cutaneous eruptions manifested; (2) the cutaneous lesions appeared once treatment had already been initiated; and (3) the cutaneous lesions persisted long after the malignancy was no longer identifiable on CT. Indeed, eruption of the papules temporally coincided closely with the initiation of BRAF inhibitor therapy, arguing for correlation.
As a suspected BRAF inhibitor–associated cutaneous AE, the eruption of verrucous keratoses in our patient is remarkable for its spontaneous resolution despite ongoing therapy. It is speculated that keratinocytic proliferation while on BRAF inhibitor therapy may be caused by a paradoxical increase in signaling through CRAF, another Raf isoform that plays a role in the induction of terminal differentiation of keratinocytes, with a subsequent increase in MAPK signaling.12-14 Self-resolution of this cycle despite continuing BRAF inhibitor therapy suggests the possible involvement of balancing and/or alternative mechanistic pathways that may be related to the immune system. Although verrucous keratoses are considered benign proliferations and do not necessarily require any specific treatment or reduction in BRAF inhibitor dosage, they may be treated with cryotherapy, electrocautery, shave removal, or excision,15 which often is done if the lesions become inflamed and cause pain. Additionally, some patients may feel distress from the appearance of the lesions and desire treatment for this reason. Understanding that verrucous keratoses can be a transient cutaneous AE rather than a persistent one may be useful to clinicians as they manage AEs during BRAF inhibitor therapy.
- Pakneshan S, Salajegheh A, Smith RA, Lam AK. Clinicopathological relevance of BRAF mutations in human cancer. Pathology. 2013;45:346-356. doi:10.1097/PAT.0b013e328360b61d
- Dhomen N, Marais R. BRAF signaling and targeted therapies in melanoma. Hematol Oncol Clin North Am. 2009;23:529-545. doi:10.1016/j.hoc.2009.04.001
- Long GV, Menzies AM, Nagrial AM, et al. Prognostic and clinicopathologic associations of oncogenic BRAF in metastatic melanoma. J Clin Oncol. 2011;29:1239-1246. doi:10.1200/JCO.2010.32.4327
- Ji Z, Flaherty KT, Tsao H. Targeting the RAS pathway in melanoma. Trends Mol Med. 2012;18:27-35. doi:10.1016/j.molmed.2011.08.001
- Gouda MA, Subbiah V. Precision oncology for BRAF-mutant cancers with BRAF and MEK inhibitors: from melanoma to tissue-agnostic therapy. ESMO Open. 2023;8:100788. doi:10.1016/j.esmoop.2023.100788
- Gençler B, Gönül M. Cutaneous side effects of BRAF inhibitors in advanced melanoma: review of the literature. Dermatol Res Pract. 2016;2016:5361569. doi:10.1155/2016/5361569.
- Chu EY, Wanat KA, Miller CJ, et al. Diverse cutaneous side effects associated with BRAF inhibitor therapy: a clinicopathologic study. J Am Acad Dermatol. 2012;67:1265-1272. doi:10.1016/j.jaad.2012.04.008
- Naqash AR, File DM, Ziemer CM, et al. Cutaneous adverse reactions in B-RAF positive metastatic melanoma following sequential treatment with B-RAF/MEK inhibitors and immune checkpoint blockade or vice versa. a single-institutional case-series. J Immunother Cancer. 2019;7:4. doi:10.1186/s40425-018-0475-y
- Maldonado-Seral C, Berros-Fombella JP, Vivanco-Allende B, et al. Vemurafenib-associated neutrophilic panniculitis: an emergent adverse effect of variable severity. Dermatol Online J. 2013;19:16. doi:10.5070/d370x41670
- Mirali S, Mufti A, Lansang RP, et al. Eruptive seborrheic keratoses are associated with a co-occurring malignancy in the majority of reported cases: a systematic review. J Cutan Med Surg. 2022;26:57-62. doi:10.1177/12034754211035124
- Thiers BH, Sahn RE, Callen JP. Cutaneous manifestations of internal malignancy. CA Cancer J Clin. 2009;59:73-98. doi:10.3322/caac.20005
- Hatzivassiliou G, Song K, Yen I, et al. RAF inhibitors prime wild-type RAF to activate the MAPK pathway and enhance growth. Nature. 2010;464:431-435. doi:10.1038/nature08833
- Heidorn SJ, Milagre C, Whittaker S, et al. Kinase-dead BRAF and oncogenic RAS cooperate to drive tumor progression through CRAF. Cell. 2010;140:209-221. doi:10.1016/j.cell.2009.12.040
- Poulikakos PI, Zhang C, Bollag G, et al. RAF inhibitors transactivate RAF dimers and ERK signaling in cells with wild-type BRAF. Nature. 2010;464:427-430. doi:10.1038/nature08902
- Hayat MA. Brain Metastases from Primary Tumors, Volume 3: Epidemiology, Biology, and Therapy of Melanoma and Other Cancers. Academic Press; 2016.
- Pakneshan S, Salajegheh A, Smith RA, Lam AK. Clinicopathological relevance of BRAF mutations in human cancer. Pathology. 2013;45:346-356. doi:10.1097/PAT.0b013e328360b61d
- Dhomen N, Marais R. BRAF signaling and targeted therapies in melanoma. Hematol Oncol Clin North Am. 2009;23:529-545. doi:10.1016/j.hoc.2009.04.001
- Long GV, Menzies AM, Nagrial AM, et al. Prognostic and clinicopathologic associations of oncogenic BRAF in metastatic melanoma. J Clin Oncol. 2011;29:1239-1246. doi:10.1200/JCO.2010.32.4327
- Ji Z, Flaherty KT, Tsao H. Targeting the RAS pathway in melanoma. Trends Mol Med. 2012;18:27-35. doi:10.1016/j.molmed.2011.08.001
- Gouda MA, Subbiah V. Precision oncology for BRAF-mutant cancers with BRAF and MEK inhibitors: from melanoma to tissue-agnostic therapy. ESMO Open. 2023;8:100788. doi:10.1016/j.esmoop.2023.100788
- Gençler B, Gönül M. Cutaneous side effects of BRAF inhibitors in advanced melanoma: review of the literature. Dermatol Res Pract. 2016;2016:5361569. doi:10.1155/2016/5361569.
- Chu EY, Wanat KA, Miller CJ, et al. Diverse cutaneous side effects associated with BRAF inhibitor therapy: a clinicopathologic study. J Am Acad Dermatol. 2012;67:1265-1272. doi:10.1016/j.jaad.2012.04.008
- Naqash AR, File DM, Ziemer CM, et al. Cutaneous adverse reactions in B-RAF positive metastatic melanoma following sequential treatment with B-RAF/MEK inhibitors and immune checkpoint blockade or vice versa. a single-institutional case-series. J Immunother Cancer. 2019;7:4. doi:10.1186/s40425-018-0475-y
- Maldonado-Seral C, Berros-Fombella JP, Vivanco-Allende B, et al. Vemurafenib-associated neutrophilic panniculitis: an emergent adverse effect of variable severity. Dermatol Online J. 2013;19:16. doi:10.5070/d370x41670
- Mirali S, Mufti A, Lansang RP, et al. Eruptive seborrheic keratoses are associated with a co-occurring malignancy in the majority of reported cases: a systematic review. J Cutan Med Surg. 2022;26:57-62. doi:10.1177/12034754211035124
- Thiers BH, Sahn RE, Callen JP. Cutaneous manifestations of internal malignancy. CA Cancer J Clin. 2009;59:73-98. doi:10.3322/caac.20005
- Hatzivassiliou G, Song K, Yen I, et al. RAF inhibitors prime wild-type RAF to activate the MAPK pathway and enhance growth. Nature. 2010;464:431-435. doi:10.1038/nature08833
- Heidorn SJ, Milagre C, Whittaker S, et al. Kinase-dead BRAF and oncogenic RAS cooperate to drive tumor progression through CRAF. Cell. 2010;140:209-221. doi:10.1016/j.cell.2009.12.040
- Poulikakos PI, Zhang C, Bollag G, et al. RAF inhibitors transactivate RAF dimers and ERK signaling in cells with wild-type BRAF. Nature. 2010;464:427-430. doi:10.1038/nature08902
- Hayat MA. Brain Metastases from Primary Tumors, Volume 3: Epidemiology, Biology, and Therapy of Melanoma and Other Cancers. Academic Press; 2016.
Practice Points
- Verrucous keratoses are common cutaneous adverse events (AEs) associated with BRAF inhibitor therapy.
- Verrucous papules may be a paraneoplastic phenomenon and can be differentiated from a treatment-related AE based on the timing and progression in relation to tumor burden.
- Although treatment of particularly bothersome lesions with cryotherapy may be warranted, verrucous papules secondary to BRAF inhibitor therapy may resolve spontaneously.
Cancer Risk: Are Pesticides the New Smoking?
Pesticides have transformed modern agriculture by boosting production yields and helping alleviate food insecurity amid rapid global population growth. However, from a public health perspective, exposure to pesticides has been linked to numerous harmful effects, including neurologic disorders like Parkinson’s disease, weakened immune function, and an increased risk for cancer.
thus offering a limited perspective.
A comprehensive assessment of how pesticide use affects cancer risk across a broader population has yet to be conducted.
A recent population-level study aimed to address this gap by evaluating cancer risks in the US population using a model that accounts for pesticide use and adjusts for various factors. The goal was to identify regional disparities in exposure and contribute to the development of public health policies that protect populations from potential harm.
Calculating Cancer Risk
Researchers developed a model using several data sources to estimate the additional cancer risk from agricultural pesticide use. Key data included:
- Pesticide use data from the US Geological Survey in 2019, which covered 69 agricultural pesticides across 3143 counties
- Cancer incidence rates per 100,000 people, which were collected between 2015 and 2019 by the National Institutes of Health and the Centers for Disease Control and Prevention; these data covered various cancers, including bladder, colorectal, leukemia, lung, non-Hodgkin lymphoma, and pancreatic cancers
- Covariates, including smoking prevalence, the Social Vulnerability Index, agricultural land use, and total US population in 2019
Pesticide use profile patterns were developed using latent class analysis, a statistical method used to identify homogeneous subgroups within a heterogeneous population. A generalized linear model then estimated how these pesticide use patterns and the covariates affected cancer incidence.
The model highlighted regions with the highest and lowest “additional” cancer risks linked to pesticide exposure, calculating the estimated increase in cancer cases per year that resulted from variations in agricultural pesticide use.
Midwest Most Affected
While this model doesn’t establish causality or assess individual risk, it reveals regional trends in the association between pesticide use patterns and cancer incidence from a population-based perspective.
The Midwest, known for its high corn production, emerged as the region most affected by pesticide use. Compared with regions with the lowest risk, the Midwest faced an additional 154,541 cancer cases annually across all types. For colorectal and pancreatic cancers, the yearly increases were 20,927 and 3835 cases, respectively. Similar trends were observed for leukemia and non-Hodgkin lymphoma.
Pesticides vs Smoking
The researchers also estimated the additional cancer risk related to smoking, using the same model. They found that pesticides contributed to a higher risk for cancer than smoking in several cases.
The most significant difference was observed with non-Hodgkin lymphoma, where pesticides were linked to 154.1% more cases than smoking. For all cancers combined, as well as bladder cancer and leukemia, the increases were moderate: 18.7%, 19.3%, and 21.0%, respectively.
This result highlights the importance of considering pesticide exposure alongside smoking when studying cancer risks.
Expanding Scope of Research
Some limitations of this study should be noted. Certain counties lacked complete data, and there was heterogeneity in the size and population of the counties studied. The research also did not account for seasonal and migrant workers, who are likely to be heavily exposed. In addition, the data used in the study were not independently validated, and they could not be used to assess individual risk.
The effect of pesticides on human health is a vast and critical field of research, often focusing on a limited range of pesticides or specific cancers. This study stands out by taking a broader, more holistic approach, aiming to highlight regional inequalities and identify less-studied pesticides that could be future research priorities.
Given the significant public health impact, the authors encouraged the authorities to share these findings with the most vulnerable communities to raise awareness.
This story was translated from JIM using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.
Pesticides have transformed modern agriculture by boosting production yields and helping alleviate food insecurity amid rapid global population growth. However, from a public health perspective, exposure to pesticides has been linked to numerous harmful effects, including neurologic disorders like Parkinson’s disease, weakened immune function, and an increased risk for cancer.
thus offering a limited perspective.
A comprehensive assessment of how pesticide use affects cancer risk across a broader population has yet to be conducted.
A recent population-level study aimed to address this gap by evaluating cancer risks in the US population using a model that accounts for pesticide use and adjusts for various factors. The goal was to identify regional disparities in exposure and contribute to the development of public health policies that protect populations from potential harm.
Calculating Cancer Risk
Researchers developed a model using several data sources to estimate the additional cancer risk from agricultural pesticide use. Key data included:
- Pesticide use data from the US Geological Survey in 2019, which covered 69 agricultural pesticides across 3143 counties
- Cancer incidence rates per 100,000 people, which were collected between 2015 and 2019 by the National Institutes of Health and the Centers for Disease Control and Prevention; these data covered various cancers, including bladder, colorectal, leukemia, lung, non-Hodgkin lymphoma, and pancreatic cancers
- Covariates, including smoking prevalence, the Social Vulnerability Index, agricultural land use, and total US population in 2019
Pesticide use profile patterns were developed using latent class analysis, a statistical method used to identify homogeneous subgroups within a heterogeneous population. A generalized linear model then estimated how these pesticide use patterns and the covariates affected cancer incidence.
The model highlighted regions with the highest and lowest “additional” cancer risks linked to pesticide exposure, calculating the estimated increase in cancer cases per year that resulted from variations in agricultural pesticide use.
Midwest Most Affected
While this model doesn’t establish causality or assess individual risk, it reveals regional trends in the association between pesticide use patterns and cancer incidence from a population-based perspective.
The Midwest, known for its high corn production, emerged as the region most affected by pesticide use. Compared with regions with the lowest risk, the Midwest faced an additional 154,541 cancer cases annually across all types. For colorectal and pancreatic cancers, the yearly increases were 20,927 and 3835 cases, respectively. Similar trends were observed for leukemia and non-Hodgkin lymphoma.
Pesticides vs Smoking
The researchers also estimated the additional cancer risk related to smoking, using the same model. They found that pesticides contributed to a higher risk for cancer than smoking in several cases.
The most significant difference was observed with non-Hodgkin lymphoma, where pesticides were linked to 154.1% more cases than smoking. For all cancers combined, as well as bladder cancer and leukemia, the increases were moderate: 18.7%, 19.3%, and 21.0%, respectively.
This result highlights the importance of considering pesticide exposure alongside smoking when studying cancer risks.
Expanding Scope of Research
Some limitations of this study should be noted. Certain counties lacked complete data, and there was heterogeneity in the size and population of the counties studied. The research also did not account for seasonal and migrant workers, who are likely to be heavily exposed. In addition, the data used in the study were not independently validated, and they could not be used to assess individual risk.
The effect of pesticides on human health is a vast and critical field of research, often focusing on a limited range of pesticides or specific cancers. This study stands out by taking a broader, more holistic approach, aiming to highlight regional inequalities and identify less-studied pesticides that could be future research priorities.
Given the significant public health impact, the authors encouraged the authorities to share these findings with the most vulnerable communities to raise awareness.
This story was translated from JIM using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.
Pesticides have transformed modern agriculture by boosting production yields and helping alleviate food insecurity amid rapid global population growth. However, from a public health perspective, exposure to pesticides has been linked to numerous harmful effects, including neurologic disorders like Parkinson’s disease, weakened immune function, and an increased risk for cancer.
thus offering a limited perspective.
A comprehensive assessment of how pesticide use affects cancer risk across a broader population has yet to be conducted.
A recent population-level study aimed to address this gap by evaluating cancer risks in the US population using a model that accounts for pesticide use and adjusts for various factors. The goal was to identify regional disparities in exposure and contribute to the development of public health policies that protect populations from potential harm.
Calculating Cancer Risk
Researchers developed a model using several data sources to estimate the additional cancer risk from agricultural pesticide use. Key data included:
- Pesticide use data from the US Geological Survey in 2019, which covered 69 agricultural pesticides across 3143 counties
- Cancer incidence rates per 100,000 people, which were collected between 2015 and 2019 by the National Institutes of Health and the Centers for Disease Control and Prevention; these data covered various cancers, including bladder, colorectal, leukemia, lung, non-Hodgkin lymphoma, and pancreatic cancers
- Covariates, including smoking prevalence, the Social Vulnerability Index, agricultural land use, and total US population in 2019
Pesticide use profile patterns were developed using latent class analysis, a statistical method used to identify homogeneous subgroups within a heterogeneous population. A generalized linear model then estimated how these pesticide use patterns and the covariates affected cancer incidence.
The model highlighted regions with the highest and lowest “additional” cancer risks linked to pesticide exposure, calculating the estimated increase in cancer cases per year that resulted from variations in agricultural pesticide use.
Midwest Most Affected
While this model doesn’t establish causality or assess individual risk, it reveals regional trends in the association between pesticide use patterns and cancer incidence from a population-based perspective.
The Midwest, known for its high corn production, emerged as the region most affected by pesticide use. Compared with regions with the lowest risk, the Midwest faced an additional 154,541 cancer cases annually across all types. For colorectal and pancreatic cancers, the yearly increases were 20,927 and 3835 cases, respectively. Similar trends were observed for leukemia and non-Hodgkin lymphoma.
Pesticides vs Smoking
The researchers also estimated the additional cancer risk related to smoking, using the same model. They found that pesticides contributed to a higher risk for cancer than smoking in several cases.
The most significant difference was observed with non-Hodgkin lymphoma, where pesticides were linked to 154.1% more cases than smoking. For all cancers combined, as well as bladder cancer and leukemia, the increases were moderate: 18.7%, 19.3%, and 21.0%, respectively.
This result highlights the importance of considering pesticide exposure alongside smoking when studying cancer risks.
Expanding Scope of Research
Some limitations of this study should be noted. Certain counties lacked complete data, and there was heterogeneity in the size and population of the counties studied. The research also did not account for seasonal and migrant workers, who are likely to be heavily exposed. In addition, the data used in the study were not independently validated, and they could not be used to assess individual risk.
The effect of pesticides on human health is a vast and critical field of research, often focusing on a limited range of pesticides or specific cancers. This study stands out by taking a broader, more holistic approach, aiming to highlight regional inequalities and identify less-studied pesticides that could be future research priorities.
Given the significant public health impact, the authors encouraged the authorities to share these findings with the most vulnerable communities to raise awareness.
This story was translated from JIM using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.
Do Clonal Hematopoiesis and Mosaic Chromosomal Alterations Increase Solid Tumor Risk?
Clonal hematopoiesis of indeterminate potential (CHIP) and mosaic chromosomal alterations (mCAs) are associated with an increased risk for breast cancer, and CHIP is associated with increased mortality in patients with colon cancer, according to the authors of new research.
These findings, drawn from almost 11,000 patients in the Women’s Health Initiative (WHI) study, add further evidence that CHIP and mCA drive solid tumor risk, alongside known associations with hematologic malignancies, reported lead author Pinkal Desai, MD, associate professor of medicine and clinical director of molecular aging at Englander Institute for Precision Medicine, Weill Cornell Medical College, New York City, and colleagues.
How This Study Differs From Others of Breast Cancer Risk Factors
“The independent effect of CHIP and mCA on risk and mortality from solid tumors has not been elucidated due to lack of detailed data on mortality outcomes and risk factors,” the investigators wrote in Cancer, although some previous studies have suggested a link.
In particular, the investigators highlighted a 2022 UK Biobank study, which reported an association between CHIP and lung cancer and a borderline association with breast cancer that did not quite reach statistical significance.
But the UK Biobank study was confined to a UK population, Dr. Desai noted in an interview, and the data were less detailed than those in the present investigation.
“In terms of risk, the part that was lacking in previous studies was a comprehensive assessment of risk factors that increase risk for all these cancers,” Dr. Desai said. “For example, for breast cancer, we had very detailed data on [participants’] Gail risk score, which is known to impact breast cancer risk. We also had mammogram data and colonoscopy data.”
In an accompanying editorial, Koichi Takahashi, MD, PhD , and Nehali Shah, BS, of The University of Texas MD Anderson Cancer Center, Houston, Texas, pointed out the same UK Biobank findings, then noted that CHIP has also been linked with worse overall survival in unselected cancer patients. Still, they wrote, “the impact of CH on cancer risk and mortality remains controversial due to conflicting data and context‐dependent effects,” necessitating studies like this one by Dr. Desai and colleagues.
How Was the Relationship Between CHIP, MCA, and Solid Tumor Risk Assessed?
To explore possible associations between CHIP, mCA, and solid tumors, the investigators analyzed whole genome sequencing data from 10,866 women in the WHI, a multi-study program that began in 1992 and involved 161,808 women in both observational and clinical trial cohorts.
In 2002, the first big data release from the WHI suggested that hormone replacement therapy (HRT) increased breast cancer risk, leading to widespread reduction in HRT use.
More recent reports continue to shape our understanding of these risks, suggesting differences across cancer types. For breast cancer, the WHI data suggested that HRT-associated risk was largely driven by formulations involving progesterone and estrogen, whereas estrogen-only formulations, now more common, are generally considered to present an acceptable risk profile for suitable patients.
The new study accounted for this potential HRT-associated risk, including by adjusting for patients who received HRT, type of HRT received, and duration of HRT received. According to Desai, this approach is commonly used when analyzing data from the WHI, nullifying concerns about the potentially deleterious effects of the hormones used in the study.
“Our question was not ‘does HRT cause cancer?’ ” Dr. Desai said in an interview. “But HRT can be linked to breast cancer risk and has a potential to be a confounder, and hence the above methodology.
“So I can say that the confounding/effect modification that HRT would have contributed to in the relationship between exposure (CH and mCA) and outcome (cancer) is well adjusted for as described above. This is standard in WHI analyses,” she continued.
“Every Women’s Health Initiative analysis that comes out — not just for our study — uses a standard method ... where you account for hormonal therapy,” Dr. Desai added, again noting that many other potential risk factors were considered, enabling a “detailed, robust” analysis.
Dr. Takahashi and Ms. Shah agreed. “A notable strength of this study is its adjustment for many confounding factors,” they wrote. “The cohort’s well‐annotated data on other known cancer risk factors allowed for a robust assessment of CH’s independent risk.”
How Do Findings Compare With Those of the UK Biobank Study?
CHIP was associated with a 30% increased risk for breast cancer (hazard ratio [HR], 1.30; 95% CI, 1.03-1.64; P = .02), strengthening the borderline association reported by the UK Biobank study.
In contrast with the UK Biobank study, CHIP was not associated with lung cancer risk, although this may have been caused by fewer cases of lung cancer and a lack of male patients, Dr. Desai suggested.
“The discrepancy between the studies lies in the risk of lung cancer, although the point estimate in the current study suggested a positive association,” wrote Dr. Takahashi and Ms. Shah.
As in the UK Biobank study, CHIP was not associated with increased risk of developing colorectal cancer.
Mortality analysis, however, which was not conducted in the UK Biobank study, offered a new insight: Patients with existing colorectal cancer and CHIP had a significantly higher mortality risk than those without CHIP. Before stage adjustment, risk for mortality among those with colorectal cancer and CHIP was fourfold higher than those without CHIP (HR, 3.99; 95% CI, 2.41-6.62; P < .001). After stage adjustment, CHIP was still associated with a twofold higher mortality risk (HR, 2.50; 95% CI, 1.32-4.72; P = .004).
The investigators’ first mCA analyses, which employed a cell fraction cutoff greater than 3%, were unfruitful. But raising the cell fraction threshold to 5% in an exploratory analysis showed that autosomal mCA was associated with a 39% increased risk for breast cancer (HR, 1.39; 95% CI, 1.06-1.83; P = .01). No such associations were found between mCA and colorectal or lung cancer, regardless of cell fraction threshold.
The original 3% cell fraction threshold was selected on the basis of previous studies reporting a link between mCA and hematologic malignancies at this cutoff, Dr. Desai said.
She and her colleagues said a higher 5% cutoff might be needed, as they suspected that the link between mCA and solid tumors may not be causal, requiring a higher mutation rate.
Why Do Results Differ Between These Types of Studies?
Dr. Takahashi and Ms. Shah suggested that one possible limitation of the new study, and an obstacle to comparing results with the UK Biobank study and others like it, goes beyond population heterogeneity; incongruent findings could also be explained by differences in whole genome sequencing (WGS) technique.
“Although WGS allows sensitive detection of mCA through broad genomic coverage, it is less effective at detecting CHIP with low variant allele frequency (VAF) due to its relatively shallow depth (30x),” they wrote. “Consequently, the prevalence of mCA (18.8%) was much higher than that of CHIP (8.3%) in this cohort, contrasting with other studies using deeper sequencing.” As a result, the present study may have underestimated CHIP prevalence because of shallow sequencing depth.
“This inconsistency is a common challenge in CH population studies due to the lack of standardized methodologies and the frequent reliance on preexisting data not originally intended for CH detection,” Dr. Takahashi and Ms. Shah said.
Even so, despite the “heavily context-dependent” nature of these reported risks, the body of evidence to date now offers a convincing biological rationale linking CH with cancer development and outcomes, they added.
How Do the CHIP- and mCA-associated Risks Differ Between Solid Tumors and Blood Cancers?
“[These solid tumor risks are] not causal in the way CHIP mutations are causal for blood cancers,” Dr. Desai said. “Here we are talking about solid tumor risk, and it’s kind of scattered. It’s not just breast cancer ... there’s also increased colon cancer mortality. So I feel these mutations are doing something different ... they are sort of an added factor.”
Specific mechanisms remain unclear, Dr. Desai said, although she speculated about possible impacts on the inflammatory state or alterations to the tumor microenvironment.
“These are blood cells, right?” Dr. Desai asked. “They’re everywhere, and they’re changing something inherently in these tumors.”
Future research and therapeutic development
Siddhartha Jaiswal, MD, PhD, assistant professor in the Department of Pathology at Stanford University in California, whose lab focuses on clonal hematopoiesis, said the causality question is central to future research.
“The key question is, are these mutations acting because they alter the function of blood cells in some way to promote cancer risk, or is it reflective of some sort of shared etiology that’s not causal?” Dr. Jaiswal said in an interview.
Available data support both possibilities.
On one side, “reasonable evidence” supports the noncausal view, Dr. Jaiswal noted, because telomere length is one of the most common genetic risk factors for clonal hematopoiesis and also for solid tumors, suggesting a shared genetic factor. On the other hand, CHIP and mCA could be directly protumorigenic via conferred disturbances of immune cell function.
When asked if both causal and noncausal factors could be at play, Dr. Jaiswal said, “yeah, absolutely.”
The presence of a causal association could be promising from a therapeutic standpoint.
“If it turns out that this association is driven by a direct causal effect of the mutations, perhaps related to immune cell function or dysfunction, then targeting that dysfunction could be a therapeutic path to improve outcomes in people, and there’s a lot of interest in this,” Dr. Jaiswal said. He went on to explain how a trial exploring this approach via interleukin-8 inhibition in lung cancer fell short.
Yet earlier intervention may still hold promise, according to experts.
“[This study] provokes the hypothesis that CH‐targeted interventions could potentially reduce cancer risk in the future,” Dr. Takahashi and Ms. Shah said in their editorial.
The WHI program is funded by the National Heart, Lung, and Blood Institute; National Institutes of Health; and the Department of Health & Human Services. The investigators disclosed relationships with Eli Lilly, AbbVie, Celgene, and others. Dr. Jaiswal reported stock equity in a company that has an interest in clonal hematopoiesis.
A version of this article first appeared on Medscape.com.
Clonal hematopoiesis of indeterminate potential (CHIP) and mosaic chromosomal alterations (mCAs) are associated with an increased risk for breast cancer, and CHIP is associated with increased mortality in patients with colon cancer, according to the authors of new research.
These findings, drawn from almost 11,000 patients in the Women’s Health Initiative (WHI) study, add further evidence that CHIP and mCA drive solid tumor risk, alongside known associations with hematologic malignancies, reported lead author Pinkal Desai, MD, associate professor of medicine and clinical director of molecular aging at Englander Institute for Precision Medicine, Weill Cornell Medical College, New York City, and colleagues.
How This Study Differs From Others of Breast Cancer Risk Factors
“The independent effect of CHIP and mCA on risk and mortality from solid tumors has not been elucidated due to lack of detailed data on mortality outcomes and risk factors,” the investigators wrote in Cancer, although some previous studies have suggested a link.
In particular, the investigators highlighted a 2022 UK Biobank study, which reported an association between CHIP and lung cancer and a borderline association with breast cancer that did not quite reach statistical significance.
But the UK Biobank study was confined to a UK population, Dr. Desai noted in an interview, and the data were less detailed than those in the present investigation.
“In terms of risk, the part that was lacking in previous studies was a comprehensive assessment of risk factors that increase risk for all these cancers,” Dr. Desai said. “For example, for breast cancer, we had very detailed data on [participants’] Gail risk score, which is known to impact breast cancer risk. We also had mammogram data and colonoscopy data.”
In an accompanying editorial, Koichi Takahashi, MD, PhD , and Nehali Shah, BS, of The University of Texas MD Anderson Cancer Center, Houston, Texas, pointed out the same UK Biobank findings, then noted that CHIP has also been linked with worse overall survival in unselected cancer patients. Still, they wrote, “the impact of CH on cancer risk and mortality remains controversial due to conflicting data and context‐dependent effects,” necessitating studies like this one by Dr. Desai and colleagues.
How Was the Relationship Between CHIP, MCA, and Solid Tumor Risk Assessed?
To explore possible associations between CHIP, mCA, and solid tumors, the investigators analyzed whole genome sequencing data from 10,866 women in the WHI, a multi-study program that began in 1992 and involved 161,808 women in both observational and clinical trial cohorts.
In 2002, the first big data release from the WHI suggested that hormone replacement therapy (HRT) increased breast cancer risk, leading to widespread reduction in HRT use.
More recent reports continue to shape our understanding of these risks, suggesting differences across cancer types. For breast cancer, the WHI data suggested that HRT-associated risk was largely driven by formulations involving progesterone and estrogen, whereas estrogen-only formulations, now more common, are generally considered to present an acceptable risk profile for suitable patients.
The new study accounted for this potential HRT-associated risk, including by adjusting for patients who received HRT, type of HRT received, and duration of HRT received. According to Desai, this approach is commonly used when analyzing data from the WHI, nullifying concerns about the potentially deleterious effects of the hormones used in the study.
“Our question was not ‘does HRT cause cancer?’ ” Dr. Desai said in an interview. “But HRT can be linked to breast cancer risk and has a potential to be a confounder, and hence the above methodology.
“So I can say that the confounding/effect modification that HRT would have contributed to in the relationship between exposure (CH and mCA) and outcome (cancer) is well adjusted for as described above. This is standard in WHI analyses,” she continued.
“Every Women’s Health Initiative analysis that comes out — not just for our study — uses a standard method ... where you account for hormonal therapy,” Dr. Desai added, again noting that many other potential risk factors were considered, enabling a “detailed, robust” analysis.
Dr. Takahashi and Ms. Shah agreed. “A notable strength of this study is its adjustment for many confounding factors,” they wrote. “The cohort’s well‐annotated data on other known cancer risk factors allowed for a robust assessment of CH’s independent risk.”
How Do Findings Compare With Those of the UK Biobank Study?
CHIP was associated with a 30% increased risk for breast cancer (hazard ratio [HR], 1.30; 95% CI, 1.03-1.64; P = .02), strengthening the borderline association reported by the UK Biobank study.
In contrast with the UK Biobank study, CHIP was not associated with lung cancer risk, although this may have been caused by fewer cases of lung cancer and a lack of male patients, Dr. Desai suggested.
“The discrepancy between the studies lies in the risk of lung cancer, although the point estimate in the current study suggested a positive association,” wrote Dr. Takahashi and Ms. Shah.
As in the UK Biobank study, CHIP was not associated with increased risk of developing colorectal cancer.
Mortality analysis, however, which was not conducted in the UK Biobank study, offered a new insight: Patients with existing colorectal cancer and CHIP had a significantly higher mortality risk than those without CHIP. Before stage adjustment, risk for mortality among those with colorectal cancer and CHIP was fourfold higher than those without CHIP (HR, 3.99; 95% CI, 2.41-6.62; P < .001). After stage adjustment, CHIP was still associated with a twofold higher mortality risk (HR, 2.50; 95% CI, 1.32-4.72; P = .004).
The investigators’ first mCA analyses, which employed a cell fraction cutoff greater than 3%, were unfruitful. But raising the cell fraction threshold to 5% in an exploratory analysis showed that autosomal mCA was associated with a 39% increased risk for breast cancer (HR, 1.39; 95% CI, 1.06-1.83; P = .01). No such associations were found between mCA and colorectal or lung cancer, regardless of cell fraction threshold.
The original 3% cell fraction threshold was selected on the basis of previous studies reporting a link between mCA and hematologic malignancies at this cutoff, Dr. Desai said.
She and her colleagues said a higher 5% cutoff might be needed, as they suspected that the link between mCA and solid tumors may not be causal, requiring a higher mutation rate.
Why Do Results Differ Between These Types of Studies?
Dr. Takahashi and Ms. Shah suggested that one possible limitation of the new study, and an obstacle to comparing results with the UK Biobank study and others like it, goes beyond population heterogeneity; incongruent findings could also be explained by differences in whole genome sequencing (WGS) technique.
“Although WGS allows sensitive detection of mCA through broad genomic coverage, it is less effective at detecting CHIP with low variant allele frequency (VAF) due to its relatively shallow depth (30x),” they wrote. “Consequently, the prevalence of mCA (18.8%) was much higher than that of CHIP (8.3%) in this cohort, contrasting with other studies using deeper sequencing.” As a result, the present study may have underestimated CHIP prevalence because of shallow sequencing depth.
“This inconsistency is a common challenge in CH population studies due to the lack of standardized methodologies and the frequent reliance on preexisting data not originally intended for CH detection,” Dr. Takahashi and Ms. Shah said.
Even so, despite the “heavily context-dependent” nature of these reported risks, the body of evidence to date now offers a convincing biological rationale linking CH with cancer development and outcomes, they added.
How Do the CHIP- and mCA-associated Risks Differ Between Solid Tumors and Blood Cancers?
“[These solid tumor risks are] not causal in the way CHIP mutations are causal for blood cancers,” Dr. Desai said. “Here we are talking about solid tumor risk, and it’s kind of scattered. It’s not just breast cancer ... there’s also increased colon cancer mortality. So I feel these mutations are doing something different ... they are sort of an added factor.”
Specific mechanisms remain unclear, Dr. Desai said, although she speculated about possible impacts on the inflammatory state or alterations to the tumor microenvironment.
“These are blood cells, right?” Dr. Desai asked. “They’re everywhere, and they’re changing something inherently in these tumors.”
Future research and therapeutic development
Siddhartha Jaiswal, MD, PhD, assistant professor in the Department of Pathology at Stanford University in California, whose lab focuses on clonal hematopoiesis, said the causality question is central to future research.
“The key question is, are these mutations acting because they alter the function of blood cells in some way to promote cancer risk, or is it reflective of some sort of shared etiology that’s not causal?” Dr. Jaiswal said in an interview.
Available data support both possibilities.
On one side, “reasonable evidence” supports the noncausal view, Dr. Jaiswal noted, because telomere length is one of the most common genetic risk factors for clonal hematopoiesis and also for solid tumors, suggesting a shared genetic factor. On the other hand, CHIP and mCA could be directly protumorigenic via conferred disturbances of immune cell function.
When asked if both causal and noncausal factors could be at play, Dr. Jaiswal said, “yeah, absolutely.”
The presence of a causal association could be promising from a therapeutic standpoint.
“If it turns out that this association is driven by a direct causal effect of the mutations, perhaps related to immune cell function or dysfunction, then targeting that dysfunction could be a therapeutic path to improve outcomes in people, and there’s a lot of interest in this,” Dr. Jaiswal said. He went on to explain how a trial exploring this approach via interleukin-8 inhibition in lung cancer fell short.
Yet earlier intervention may still hold promise, according to experts.
“[This study] provokes the hypothesis that CH‐targeted interventions could potentially reduce cancer risk in the future,” Dr. Takahashi and Ms. Shah said in their editorial.
The WHI program is funded by the National Heart, Lung, and Blood Institute; National Institutes of Health; and the Department of Health & Human Services. The investigators disclosed relationships with Eli Lilly, AbbVie, Celgene, and others. Dr. Jaiswal reported stock equity in a company that has an interest in clonal hematopoiesis.
A version of this article first appeared on Medscape.com.
Clonal hematopoiesis of indeterminate potential (CHIP) and mosaic chromosomal alterations (mCAs) are associated with an increased risk for breast cancer, and CHIP is associated with increased mortality in patients with colon cancer, according to the authors of new research.
These findings, drawn from almost 11,000 patients in the Women’s Health Initiative (WHI) study, add further evidence that CHIP and mCA drive solid tumor risk, alongside known associations with hematologic malignancies, reported lead author Pinkal Desai, MD, associate professor of medicine and clinical director of molecular aging at Englander Institute for Precision Medicine, Weill Cornell Medical College, New York City, and colleagues.
How This Study Differs From Others of Breast Cancer Risk Factors
“The independent effect of CHIP and mCA on risk and mortality from solid tumors has not been elucidated due to lack of detailed data on mortality outcomes and risk factors,” the investigators wrote in Cancer, although some previous studies have suggested a link.
In particular, the investigators highlighted a 2022 UK Biobank study, which reported an association between CHIP and lung cancer and a borderline association with breast cancer that did not quite reach statistical significance.
But the UK Biobank study was confined to a UK population, Dr. Desai noted in an interview, and the data were less detailed than those in the present investigation.
“In terms of risk, the part that was lacking in previous studies was a comprehensive assessment of risk factors that increase risk for all these cancers,” Dr. Desai said. “For example, for breast cancer, we had very detailed data on [participants’] Gail risk score, which is known to impact breast cancer risk. We also had mammogram data and colonoscopy data.”
In an accompanying editorial, Koichi Takahashi, MD, PhD , and Nehali Shah, BS, of The University of Texas MD Anderson Cancer Center, Houston, Texas, pointed out the same UK Biobank findings, then noted that CHIP has also been linked with worse overall survival in unselected cancer patients. Still, they wrote, “the impact of CH on cancer risk and mortality remains controversial due to conflicting data and context‐dependent effects,” necessitating studies like this one by Dr. Desai and colleagues.
How Was the Relationship Between CHIP, MCA, and Solid Tumor Risk Assessed?
To explore possible associations between CHIP, mCA, and solid tumors, the investigators analyzed whole genome sequencing data from 10,866 women in the WHI, a multi-study program that began in 1992 and involved 161,808 women in both observational and clinical trial cohorts.
In 2002, the first big data release from the WHI suggested that hormone replacement therapy (HRT) increased breast cancer risk, leading to widespread reduction in HRT use.
More recent reports continue to shape our understanding of these risks, suggesting differences across cancer types. For breast cancer, the WHI data suggested that HRT-associated risk was largely driven by formulations involving progesterone and estrogen, whereas estrogen-only formulations, now more common, are generally considered to present an acceptable risk profile for suitable patients.
The new study accounted for this potential HRT-associated risk, including by adjusting for patients who received HRT, type of HRT received, and duration of HRT received. According to Desai, this approach is commonly used when analyzing data from the WHI, nullifying concerns about the potentially deleterious effects of the hormones used in the study.
“Our question was not ‘does HRT cause cancer?’ ” Dr. Desai said in an interview. “But HRT can be linked to breast cancer risk and has a potential to be a confounder, and hence the above methodology.
“So I can say that the confounding/effect modification that HRT would have contributed to in the relationship between exposure (CH and mCA) and outcome (cancer) is well adjusted for as described above. This is standard in WHI analyses,” she continued.
“Every Women’s Health Initiative analysis that comes out — not just for our study — uses a standard method ... where you account for hormonal therapy,” Dr. Desai added, again noting that many other potential risk factors were considered, enabling a “detailed, robust” analysis.
Dr. Takahashi and Ms. Shah agreed. “A notable strength of this study is its adjustment for many confounding factors,” they wrote. “The cohort’s well‐annotated data on other known cancer risk factors allowed for a robust assessment of CH’s independent risk.”
How Do Findings Compare With Those of the UK Biobank Study?
CHIP was associated with a 30% increased risk for breast cancer (hazard ratio [HR], 1.30; 95% CI, 1.03-1.64; P = .02), strengthening the borderline association reported by the UK Biobank study.
In contrast with the UK Biobank study, CHIP was not associated with lung cancer risk, although this may have been caused by fewer cases of lung cancer and a lack of male patients, Dr. Desai suggested.
“The discrepancy between the studies lies in the risk of lung cancer, although the point estimate in the current study suggested a positive association,” wrote Dr. Takahashi and Ms. Shah.
As in the UK Biobank study, CHIP was not associated with increased risk of developing colorectal cancer.
Mortality analysis, however, which was not conducted in the UK Biobank study, offered a new insight: Patients with existing colorectal cancer and CHIP had a significantly higher mortality risk than those without CHIP. Before stage adjustment, risk for mortality among those with colorectal cancer and CHIP was fourfold higher than those without CHIP (HR, 3.99; 95% CI, 2.41-6.62; P < .001). After stage adjustment, CHIP was still associated with a twofold higher mortality risk (HR, 2.50; 95% CI, 1.32-4.72; P = .004).
The investigators’ first mCA analyses, which employed a cell fraction cutoff greater than 3%, were unfruitful. But raising the cell fraction threshold to 5% in an exploratory analysis showed that autosomal mCA was associated with a 39% increased risk for breast cancer (HR, 1.39; 95% CI, 1.06-1.83; P = .01). No such associations were found between mCA and colorectal or lung cancer, regardless of cell fraction threshold.
The original 3% cell fraction threshold was selected on the basis of previous studies reporting a link between mCA and hematologic malignancies at this cutoff, Dr. Desai said.
She and her colleagues said a higher 5% cutoff might be needed, as they suspected that the link between mCA and solid tumors may not be causal, requiring a higher mutation rate.
Why Do Results Differ Between These Types of Studies?
Dr. Takahashi and Ms. Shah suggested that one possible limitation of the new study, and an obstacle to comparing results with the UK Biobank study and others like it, goes beyond population heterogeneity; incongruent findings could also be explained by differences in whole genome sequencing (WGS) technique.
“Although WGS allows sensitive detection of mCA through broad genomic coverage, it is less effective at detecting CHIP with low variant allele frequency (VAF) due to its relatively shallow depth (30x),” they wrote. “Consequently, the prevalence of mCA (18.8%) was much higher than that of CHIP (8.3%) in this cohort, contrasting with other studies using deeper sequencing.” As a result, the present study may have underestimated CHIP prevalence because of shallow sequencing depth.
“This inconsistency is a common challenge in CH population studies due to the lack of standardized methodologies and the frequent reliance on preexisting data not originally intended for CH detection,” Dr. Takahashi and Ms. Shah said.
Even so, despite the “heavily context-dependent” nature of these reported risks, the body of evidence to date now offers a convincing biological rationale linking CH with cancer development and outcomes, they added.
How Do the CHIP- and mCA-associated Risks Differ Between Solid Tumors and Blood Cancers?
“[These solid tumor risks are] not causal in the way CHIP mutations are causal for blood cancers,” Dr. Desai said. “Here we are talking about solid tumor risk, and it’s kind of scattered. It’s not just breast cancer ... there’s also increased colon cancer mortality. So I feel these mutations are doing something different ... they are sort of an added factor.”
Specific mechanisms remain unclear, Dr. Desai said, although she speculated about possible impacts on the inflammatory state or alterations to the tumor microenvironment.
“These are blood cells, right?” Dr. Desai asked. “They’re everywhere, and they’re changing something inherently in these tumors.”
Future research and therapeutic development
Siddhartha Jaiswal, MD, PhD, assistant professor in the Department of Pathology at Stanford University in California, whose lab focuses on clonal hematopoiesis, said the causality question is central to future research.
“The key question is, are these mutations acting because they alter the function of blood cells in some way to promote cancer risk, or is it reflective of some sort of shared etiology that’s not causal?” Dr. Jaiswal said in an interview.
Available data support both possibilities.
On one side, “reasonable evidence” supports the noncausal view, Dr. Jaiswal noted, because telomere length is one of the most common genetic risk factors for clonal hematopoiesis and also for solid tumors, suggesting a shared genetic factor. On the other hand, CHIP and mCA could be directly protumorigenic via conferred disturbances of immune cell function.
When asked if both causal and noncausal factors could be at play, Dr. Jaiswal said, “yeah, absolutely.”
The presence of a causal association could be promising from a therapeutic standpoint.
“If it turns out that this association is driven by a direct causal effect of the mutations, perhaps related to immune cell function or dysfunction, then targeting that dysfunction could be a therapeutic path to improve outcomes in people, and there’s a lot of interest in this,” Dr. Jaiswal said. He went on to explain how a trial exploring this approach via interleukin-8 inhibition in lung cancer fell short.
Yet earlier intervention may still hold promise, according to experts.
“[This study] provokes the hypothesis that CH‐targeted interventions could potentially reduce cancer risk in the future,” Dr. Takahashi and Ms. Shah said in their editorial.
The WHI program is funded by the National Heart, Lung, and Blood Institute; National Institutes of Health; and the Department of Health & Human Services. The investigators disclosed relationships with Eli Lilly, AbbVie, Celgene, and others. Dr. Jaiswal reported stock equity in a company that has an interest in clonal hematopoiesis.
A version of this article first appeared on Medscape.com.
FROM CANCER
Study Indicates Skin Cancer Risk Elevated Among Veterans
TOPLINE:
METHODOLOGY:
- Researchers analyzed the prevalence and likelihood of skin cancer and other dermatologic conditions between veterans and nonveterans using national representative NHANES data collected over two decades (1999-2018).
- They included 61,307 participants, with 54,554 nonveterans (42.76% men; 65.78% non-Hispanic White individuals) and 6753 veterans (92.74% men; 80.42% non-Hispanic White individuals).
- A total of 54,991 participants (48,278 nonveterans and 6713 veterans) answered questions about their cancer history.
TAKEAWAY:
- Veterans had a higher prevalence of any skin cancer than nonveterans (9% vs 2.9%; P < .001). Specifically, the prevalence of melanoma (2.2% vs 0.6%), nonmelanoma skin cancer (5.1% vs 1.6%), and skin cancer of unknown subtype (2.2% vs 0.8%) was significantly higher in veterans (P < .001, for all).
- Veterans showed elevated risks for any skin cancer (odds ratio [OR], 1.72; 95% CI, 1.23-2.40), melanoma (OR, 2.27; 95% CI, 1.17-4.39), and nonmelanoma skin cancer (OR, 1.80; 95% CI, 1.17-2.78) after adjusting for demographic factors.
- Veterans also had a higher risk for psoriasis (OR, 1.61; 95% CI, 1.05-2.46), but not for eczema/dermatitis/inflamed rash in the previous 30 days anywhere on the body, although risk was significantly increased when localized to the arms.
- Veterans were more likely to spend time outdoors on workdays (OR, 1.22; 95% CI, 1.04-2.25) but their status did not differ significantly from that of nonveterans in sunscreen use or other sun protection behaviors. However, veterans had a 44%-45% (P < .05) increased risk for severe sunburn after brief sun exposure.
IN PRACTICE:
“Public health measures seeking to address veteran healthcare differences could emphasize primary preventive strategies to mitigate risk and early detection of dermatologic conditions through regular skin examinations,” the study authors concluded. An accompanying editorial noted that “dermatologists should be aware that veterans face higher skin cancer risks even after adjusting for demographic differences, potentially due at least in part, to occupational exposures.” In addition, the editorial authors wrote, “additional research is needed to identify and quantify the effects of UV and military toxic exposures on skin cancer risk among active duty service members.”
SOURCE:
The study was led by Shawheen J. Rezaei, MPhil, from the Department of Dermatology, Stanford University School of Medicine, Stanford, California, and was published online in JAMA Dermatology. The authors of the editorial are from the Departments of Dermatology at Brigham and Women’s Hospital, Boston, and Vanderbilt University, Nashville, Tennessee.
LIMITATIONS:
Skin cancer, psoriasis, and eczema/dermatitis were self-reported, and the predominance of older White men limited the generalizability of the findings.
DISCLOSURES:
The study was supported by Veterans Affairs (VA) Palo Alto Health Care System, Palo Alto, California, and Providence VA Medical Center, Providence, Rhode Island. The authors had no disclosures. The authors of the editorial disclosed receiving grants from the VA; one author’s disclosures included receiving personal fees from and being a scientific officer for Evereden, receiving grants and research funding from DermaSensor, and consulting for Oasis Pharmaceuticals and Almirall.
This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.
A version of this article first appeared on Medscape.com.
TOPLINE:
METHODOLOGY:
- Researchers analyzed the prevalence and likelihood of skin cancer and other dermatologic conditions between veterans and nonveterans using national representative NHANES data collected over two decades (1999-2018).
- They included 61,307 participants, with 54,554 nonveterans (42.76% men; 65.78% non-Hispanic White individuals) and 6753 veterans (92.74% men; 80.42% non-Hispanic White individuals).
- A total of 54,991 participants (48,278 nonveterans and 6713 veterans) answered questions about their cancer history.
TAKEAWAY:
- Veterans had a higher prevalence of any skin cancer than nonveterans (9% vs 2.9%; P < .001). Specifically, the prevalence of melanoma (2.2% vs 0.6%), nonmelanoma skin cancer (5.1% vs 1.6%), and skin cancer of unknown subtype (2.2% vs 0.8%) was significantly higher in veterans (P < .001, for all).
- Veterans showed elevated risks for any skin cancer (odds ratio [OR], 1.72; 95% CI, 1.23-2.40), melanoma (OR, 2.27; 95% CI, 1.17-4.39), and nonmelanoma skin cancer (OR, 1.80; 95% CI, 1.17-2.78) after adjusting for demographic factors.
- Veterans also had a higher risk for psoriasis (OR, 1.61; 95% CI, 1.05-2.46), but not for eczema/dermatitis/inflamed rash in the previous 30 days anywhere on the body, although risk was significantly increased when localized to the arms.
- Veterans were more likely to spend time outdoors on workdays (OR, 1.22; 95% CI, 1.04-2.25) but their status did not differ significantly from that of nonveterans in sunscreen use or other sun protection behaviors. However, veterans had a 44%-45% (P < .05) increased risk for severe sunburn after brief sun exposure.
IN PRACTICE:
“Public health measures seeking to address veteran healthcare differences could emphasize primary preventive strategies to mitigate risk and early detection of dermatologic conditions through regular skin examinations,” the study authors concluded. An accompanying editorial noted that “dermatologists should be aware that veterans face higher skin cancer risks even after adjusting for demographic differences, potentially due at least in part, to occupational exposures.” In addition, the editorial authors wrote, “additional research is needed to identify and quantify the effects of UV and military toxic exposures on skin cancer risk among active duty service members.”
SOURCE:
The study was led by Shawheen J. Rezaei, MPhil, from the Department of Dermatology, Stanford University School of Medicine, Stanford, California, and was published online in JAMA Dermatology. The authors of the editorial are from the Departments of Dermatology at Brigham and Women’s Hospital, Boston, and Vanderbilt University, Nashville, Tennessee.
LIMITATIONS:
Skin cancer, psoriasis, and eczema/dermatitis were self-reported, and the predominance of older White men limited the generalizability of the findings.
DISCLOSURES:
The study was supported by Veterans Affairs (VA) Palo Alto Health Care System, Palo Alto, California, and Providence VA Medical Center, Providence, Rhode Island. The authors had no disclosures. The authors of the editorial disclosed receiving grants from the VA; one author’s disclosures included receiving personal fees from and being a scientific officer for Evereden, receiving grants and research funding from DermaSensor, and consulting for Oasis Pharmaceuticals and Almirall.
This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.
A version of this article first appeared on Medscape.com.
TOPLINE:
METHODOLOGY:
- Researchers analyzed the prevalence and likelihood of skin cancer and other dermatologic conditions between veterans and nonveterans using national representative NHANES data collected over two decades (1999-2018).
- They included 61,307 participants, with 54,554 nonveterans (42.76% men; 65.78% non-Hispanic White individuals) and 6753 veterans (92.74% men; 80.42% non-Hispanic White individuals).
- A total of 54,991 participants (48,278 nonveterans and 6713 veterans) answered questions about their cancer history.
TAKEAWAY:
- Veterans had a higher prevalence of any skin cancer than nonveterans (9% vs 2.9%; P < .001). Specifically, the prevalence of melanoma (2.2% vs 0.6%), nonmelanoma skin cancer (5.1% vs 1.6%), and skin cancer of unknown subtype (2.2% vs 0.8%) was significantly higher in veterans (P < .001, for all).
- Veterans showed elevated risks for any skin cancer (odds ratio [OR], 1.72; 95% CI, 1.23-2.40), melanoma (OR, 2.27; 95% CI, 1.17-4.39), and nonmelanoma skin cancer (OR, 1.80; 95% CI, 1.17-2.78) after adjusting for demographic factors.
- Veterans also had a higher risk for psoriasis (OR, 1.61; 95% CI, 1.05-2.46), but not for eczema/dermatitis/inflamed rash in the previous 30 days anywhere on the body, although risk was significantly increased when localized to the arms.
- Veterans were more likely to spend time outdoors on workdays (OR, 1.22; 95% CI, 1.04-2.25) but their status did not differ significantly from that of nonveterans in sunscreen use or other sun protection behaviors. However, veterans had a 44%-45% (P < .05) increased risk for severe sunburn after brief sun exposure.
IN PRACTICE:
“Public health measures seeking to address veteran healthcare differences could emphasize primary preventive strategies to mitigate risk and early detection of dermatologic conditions through regular skin examinations,” the study authors concluded. An accompanying editorial noted that “dermatologists should be aware that veterans face higher skin cancer risks even after adjusting for demographic differences, potentially due at least in part, to occupational exposures.” In addition, the editorial authors wrote, “additional research is needed to identify and quantify the effects of UV and military toxic exposures on skin cancer risk among active duty service members.”
SOURCE:
The study was led by Shawheen J. Rezaei, MPhil, from the Department of Dermatology, Stanford University School of Medicine, Stanford, California, and was published online in JAMA Dermatology. The authors of the editorial are from the Departments of Dermatology at Brigham and Women’s Hospital, Boston, and Vanderbilt University, Nashville, Tennessee.
LIMITATIONS:
Skin cancer, psoriasis, and eczema/dermatitis were self-reported, and the predominance of older White men limited the generalizability of the findings.
DISCLOSURES:
The study was supported by Veterans Affairs (VA) Palo Alto Health Care System, Palo Alto, California, and Providence VA Medical Center, Providence, Rhode Island. The authors had no disclosures. The authors of the editorial disclosed receiving grants from the VA; one author’s disclosures included receiving personal fees from and being a scientific officer for Evereden, receiving grants and research funding from DermaSensor, and consulting for Oasis Pharmaceuticals and Almirall.
This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.
A version of this article first appeared on Medscape.com.
Cancer Cases, Deaths in Men Predicted to Surge by 2050
TOPLINE:
— with substantial disparities in cancer cases and deaths by age and region of the world, a recent analysis found.
METHODOLOGY:
- Overall, men have higher cancer incidence and mortality rates, which can be largely attributed to a higher prevalence of modifiable risk factors such as smoking, alcohol consumption, and occupational carcinogens, as well as the underuse of cancer prevention, screening, and treatment services.
- To assess the burden of cancer in men of different ages and from different regions of the world, researchers analyzed data from the 2022 Global Cancer Observatory (GLOBOCAN), which provides national-level estimates for cancer cases and deaths.
- Study outcomes included the incidence, mortality, and prevalence of cancer among men in 2022, along with projections for 2050. Estimates were stratified by several factors, including age; region; and Human Development Index (HDI), a composite score for health, education, and standard of living.
- Researchers also calculated mortality-to-incidence ratios (MIRs) for various cancer types, where higher values indicate worse survival.
TAKEAWAY:
- The researchers reported an estimated 10.3 million cancer cases and 5.4 million deaths globally in 2022, with almost two thirds of cases and deaths occurring in men aged 65 years or older.
- By 2050, cancer cases and deaths were projected to increase by 84.3% (to 19 million) and 93.2% (to 10.5 million), respectively. The increase from 2022 to 2050 was more than twofold higher for older men and countries with low and medium HDI.
- In 2022, the estimated global cancer MIR among men was nearly 55%, with variations by cancer types, age, and HDI. The MIR was lowest for thyroid cancer (7.6%) and highest for pancreatic cancer (90.9%); among World Health Organization regions, Africa had the highest MIR (72.6%), while the Americas had the lowest MIR (39.1%); countries with the lowest HDI had the highest MIR (73.5% vs 41.1% for very high HDI).
- Lung cancer was the leading cause for cases and deaths in 2022 and was projected to remain the leading cause in 2050.
IN PRACTICE:
“Disparities in cancer incidence and mortality among men were observed across age groups, countries/territories, and HDI in 2022, with these disparities projected to widen further by 2050,” according to the authors, who called for efforts to “reduce disparities in cancer burden and ensure equity in cancer prevention and care for men across the globe.”
SOURCE:
The study, led by Habtamu Mellie Bizuayehu, PhD, School of Public Health, Faculty of Medicine, The University of Queensland, Brisbane, Australia, was published online in Cancer.
LIMITATIONS:
The findings may be influenced by the quality of GLOBOCAN data. Interpretation should be cautious as MIR may not fully reflect cancer outcome inequalities. The study did not include other measures of cancer burden, such as years of life lost or years lived with disability, which were unavailable from the data source.
DISCLOSURES:
The authors did not disclose any funding information. The authors declared no conflicts of interest.
This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article first appeared on Medscape.com.
TOPLINE:
— with substantial disparities in cancer cases and deaths by age and region of the world, a recent analysis found.
METHODOLOGY:
- Overall, men have higher cancer incidence and mortality rates, which can be largely attributed to a higher prevalence of modifiable risk factors such as smoking, alcohol consumption, and occupational carcinogens, as well as the underuse of cancer prevention, screening, and treatment services.
- To assess the burden of cancer in men of different ages and from different regions of the world, researchers analyzed data from the 2022 Global Cancer Observatory (GLOBOCAN), which provides national-level estimates for cancer cases and deaths.
- Study outcomes included the incidence, mortality, and prevalence of cancer among men in 2022, along with projections for 2050. Estimates were stratified by several factors, including age; region; and Human Development Index (HDI), a composite score for health, education, and standard of living.
- Researchers also calculated mortality-to-incidence ratios (MIRs) for various cancer types, where higher values indicate worse survival.
TAKEAWAY:
- The researchers reported an estimated 10.3 million cancer cases and 5.4 million deaths globally in 2022, with almost two thirds of cases and deaths occurring in men aged 65 years or older.
- By 2050, cancer cases and deaths were projected to increase by 84.3% (to 19 million) and 93.2% (to 10.5 million), respectively. The increase from 2022 to 2050 was more than twofold higher for older men and countries with low and medium HDI.
- In 2022, the estimated global cancer MIR among men was nearly 55%, with variations by cancer types, age, and HDI. The MIR was lowest for thyroid cancer (7.6%) and highest for pancreatic cancer (90.9%); among World Health Organization regions, Africa had the highest MIR (72.6%), while the Americas had the lowest MIR (39.1%); countries with the lowest HDI had the highest MIR (73.5% vs 41.1% for very high HDI).
- Lung cancer was the leading cause for cases and deaths in 2022 and was projected to remain the leading cause in 2050.
IN PRACTICE:
“Disparities in cancer incidence and mortality among men were observed across age groups, countries/territories, and HDI in 2022, with these disparities projected to widen further by 2050,” according to the authors, who called for efforts to “reduce disparities in cancer burden and ensure equity in cancer prevention and care for men across the globe.”
SOURCE:
The study, led by Habtamu Mellie Bizuayehu, PhD, School of Public Health, Faculty of Medicine, The University of Queensland, Brisbane, Australia, was published online in Cancer.
LIMITATIONS:
The findings may be influenced by the quality of GLOBOCAN data. Interpretation should be cautious as MIR may not fully reflect cancer outcome inequalities. The study did not include other measures of cancer burden, such as years of life lost or years lived with disability, which were unavailable from the data source.
DISCLOSURES:
The authors did not disclose any funding information. The authors declared no conflicts of interest.
This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article first appeared on Medscape.com.
TOPLINE:
— with substantial disparities in cancer cases and deaths by age and region of the world, a recent analysis found.
METHODOLOGY:
- Overall, men have higher cancer incidence and mortality rates, which can be largely attributed to a higher prevalence of modifiable risk factors such as smoking, alcohol consumption, and occupational carcinogens, as well as the underuse of cancer prevention, screening, and treatment services.
- To assess the burden of cancer in men of different ages and from different regions of the world, researchers analyzed data from the 2022 Global Cancer Observatory (GLOBOCAN), which provides national-level estimates for cancer cases and deaths.
- Study outcomes included the incidence, mortality, and prevalence of cancer among men in 2022, along with projections for 2050. Estimates were stratified by several factors, including age; region; and Human Development Index (HDI), a composite score for health, education, and standard of living.
- Researchers also calculated mortality-to-incidence ratios (MIRs) for various cancer types, where higher values indicate worse survival.
TAKEAWAY:
- The researchers reported an estimated 10.3 million cancer cases and 5.4 million deaths globally in 2022, with almost two thirds of cases and deaths occurring in men aged 65 years or older.
- By 2050, cancer cases and deaths were projected to increase by 84.3% (to 19 million) and 93.2% (to 10.5 million), respectively. The increase from 2022 to 2050 was more than twofold higher for older men and countries with low and medium HDI.
- In 2022, the estimated global cancer MIR among men was nearly 55%, with variations by cancer types, age, and HDI. The MIR was lowest for thyroid cancer (7.6%) and highest for pancreatic cancer (90.9%); among World Health Organization regions, Africa had the highest MIR (72.6%), while the Americas had the lowest MIR (39.1%); countries with the lowest HDI had the highest MIR (73.5% vs 41.1% for very high HDI).
- Lung cancer was the leading cause for cases and deaths in 2022 and was projected to remain the leading cause in 2050.
IN PRACTICE:
“Disparities in cancer incidence and mortality among men were observed across age groups, countries/territories, and HDI in 2022, with these disparities projected to widen further by 2050,” according to the authors, who called for efforts to “reduce disparities in cancer burden and ensure equity in cancer prevention and care for men across the globe.”
SOURCE:
The study, led by Habtamu Mellie Bizuayehu, PhD, School of Public Health, Faculty of Medicine, The University of Queensland, Brisbane, Australia, was published online in Cancer.
LIMITATIONS:
The findings may be influenced by the quality of GLOBOCAN data. Interpretation should be cautious as MIR may not fully reflect cancer outcome inequalities. The study did not include other measures of cancer burden, such as years of life lost or years lived with disability, which were unavailable from the data source.
DISCLOSURES:
The authors did not disclose any funding information. The authors declared no conflicts of interest.
This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article first appeared on Medscape.com.
Support for Laser Treatment to Reduce NMSC Risk is Increasing
CARLSBAD, CALIFORNIA — and a key 2017 publication laid the groundwork for current approaches, according to Elizabeth Tanzi, MD.
In the article, which was published in Molecules, Mike Kemp, PhD, and Jeffrey Bryant Travers, MD, PhD, at Wright State University, Dayton, Ohio, and Dan F. Spandau, PhD, at Indiana University School of Medicine, Indianapolis, demonstrated that geriatric skin responds to ultraviolet B (UVB) differently than young skin because of differences in insulin-like growth factor 1 (IGF-1) levels produced by dermal fibroblasts.
“As we age, our fibroblasts become senescent, inactive,” Dr. Tanzi, associate clinical professor of dermatology at George Washington University, Washington, DC, said at the Controversies and Conversations in Laser and Cosmetic Surgery symposium. “They don’t make as many growth factors, particularly IGF-1, and therefore we don’t stimulate the responses. We need more of our growth factors.”
In later, separate work, Dr. Travers, Dr. Spandau, and colleagues found that using dermabrasion or fractionated laser resurfacing to wound the skin can result in increased dermal IGF-1 levels and normalization of the abnormal pro-carcinogenic UV response associated with geriatric skin — a treatment that has the potential to prevent NMSC. That study “was the epiphany” for fostering interest among researchers in the field of lasers and medicine, Dr. Tanzi said.
In a retrospective cohort study, Mathew Avram, MD, JD, and colleagues reviewed patients with a history of facial keratinocyte carcinoma (KC) who were treated at Massachusetts General Hospital in Boston between 2005 and 2021. The study population included 43 patients treated with either the 1927- or the 1550-nm nonablative fractional laser (NAFL) and 52 matched controls. The rate of subsequent facial KC development was 20.9% in NAFL-treated patients and 40.4% in controls (relative risk, 0.52, P = .049). 
During a separate presentation at the meeting, Dr. Avram, director of lasers and cosmetics at Massachusetts General Hospital, Boston, said that, when he and his colleagues controlled for age, gender, and skin type, controls were 2.65 times more likely to develop new facial KC, compared with those treated with NAFL (P = .0169). “This enhanced effect was seen with the 1550-nm device, compared with the 1927-nm device. The study shows us that 1550-nm/1927-nm NAFL may have a protective effect for patients with a history of KC, but the role of each wavelength is to be determined. We also need a prospective, controlled study to verify the results.”
In an ongoing study first presented at the 2023 annual meeting of the American Society for Dermatologic Surgery, Dr. Tanzi and colleagues enrolled 15 patients aged ≥ 55 years to evaluate the restoration of physiologic features and biomarkers in skin treated with 25% trichloroacetic acid (TCA), plus the 1550-nm or 1927-nm NAFL. Four sites on the back were treated and biopsies were taken at baseline and at 3 months post treatment. The protocol involved TCA 25% to speckled frost, with the 1550-nm device set to level 6 at 70 mJ and the 1927-nm device set to level 8 at 20 mJ. Immunohistochemical stains are still pending; however, physiologic changes were noted.
Three months after a single treatment, the 1927-nm treated areas showed statistically significant elongation of fibroblasts (consistent with younger fibroblasts) on histology. “Although not a large study, it supports the growing body of research that demonstrates we are improving the health of our patients’ skin with certain types of laser treatments, not just beautifying it,” Dr. Tanzi said.
Dr. Tanzi disclosed being a member of the advisory board for AbbVie/Allergan and Sciton, and is a consultant for Alastin/Galderma, Candesant Biomedical, Cytrellis, Revance, and Solta Medical. Dr. Avram disclosed that he receives intellectual property royalties from and holds stock options in Cytrellis, and is a consultant to Allergan and holds stock options in BAI Biosciences, Sofwave, and La Jolla NanoMedical.
A version of this article first appeared on Medscape.com.
CARLSBAD, CALIFORNIA — and a key 2017 publication laid the groundwork for current approaches, according to Elizabeth Tanzi, MD.
In the article, which was published in Molecules, Mike Kemp, PhD, and Jeffrey Bryant Travers, MD, PhD, at Wright State University, Dayton, Ohio, and Dan F. Spandau, PhD, at Indiana University School of Medicine, Indianapolis, demonstrated that geriatric skin responds to ultraviolet B (UVB) differently than young skin because of differences in insulin-like growth factor 1 (IGF-1) levels produced by dermal fibroblasts.
“As we age, our fibroblasts become senescent, inactive,” Dr. Tanzi, associate clinical professor of dermatology at George Washington University, Washington, DC, said at the Controversies and Conversations in Laser and Cosmetic Surgery symposium. “They don’t make as many growth factors, particularly IGF-1, and therefore we don’t stimulate the responses. We need more of our growth factors.”
In later, separate work, Dr. Travers, Dr. Spandau, and colleagues found that using dermabrasion or fractionated laser resurfacing to wound the skin can result in increased dermal IGF-1 levels and normalization of the abnormal pro-carcinogenic UV response associated with geriatric skin — a treatment that has the potential to prevent NMSC. That study “was the epiphany” for fostering interest among researchers in the field of lasers and medicine, Dr. Tanzi said.
In a retrospective cohort study, Mathew Avram, MD, JD, and colleagues reviewed patients with a history of facial keratinocyte carcinoma (KC) who were treated at Massachusetts General Hospital in Boston between 2005 and 2021. The study population included 43 patients treated with either the 1927- or the 1550-nm nonablative fractional laser (NAFL) and 52 matched controls. The rate of subsequent facial KC development was 20.9% in NAFL-treated patients and 40.4% in controls (relative risk, 0.52, P = .049).
During a separate presentation at the meeting, Dr. Avram, director of lasers and cosmetics at Massachusetts General Hospital, Boston, said that, when he and his colleagues controlled for age, gender, and skin type, controls were 2.65 times more likely to develop new facial KC, compared with those treated with NAFL (P = .0169). “This enhanced effect was seen with the 1550-nm device, compared with the 1927-nm device. The study shows us that 1550-nm/1927-nm NAFL may have a protective effect for patients with a history of KC, but the role of each wavelength is to be determined. We also need a prospective, controlled study to verify the results.”
In an ongoing study first presented at the 2023 annual meeting of the American Society for Dermatologic Surgery, Dr. Tanzi and colleagues enrolled 15 patients aged ≥ 55 years to evaluate the restoration of physiologic features and biomarkers in skin treated with 25% trichloroacetic acid (TCA), plus the 1550-nm or 1927-nm NAFL. Four sites on the back were treated and biopsies were taken at baseline and at 3 months post treatment. The protocol involved TCA 25% to speckled frost, with the 1550-nm device set to level 6 at 70 mJ and the 1927-nm device set to level 8 at 20 mJ. Immunohistochemical stains are still pending; however, physiologic changes were noted.
Three months after a single treatment, the 1927-nm treated areas showed statistically significant elongation of fibroblasts (consistent with younger fibroblasts) on histology. “Although not a large study, it supports the growing body of research that demonstrates we are improving the health of our patients’ skin with certain types of laser treatments, not just beautifying it,” Dr. Tanzi said.
Dr. Tanzi disclosed being a member of the advisory board for AbbVie/Allergan and Sciton, and is a consultant for Alastin/Galderma, Candesant Biomedical, Cytrellis, Revance, and Solta Medical. Dr. Avram disclosed that he receives intellectual property royalties from and holds stock options in Cytrellis, and is a consultant to Allergan and holds stock options in BAI Biosciences, Sofwave, and La Jolla NanoMedical.
A version of this article first appeared on Medscape.com.
CARLSBAD, CALIFORNIA — and a key 2017 publication laid the groundwork for current approaches, according to Elizabeth Tanzi, MD.
In the article, which was published in Molecules, Mike Kemp, PhD, and Jeffrey Bryant Travers, MD, PhD, at Wright State University, Dayton, Ohio, and Dan F. Spandau, PhD, at Indiana University School of Medicine, Indianapolis, demonstrated that geriatric skin responds to ultraviolet B (UVB) differently than young skin because of differences in insulin-like growth factor 1 (IGF-1) levels produced by dermal fibroblasts.
“As we age, our fibroblasts become senescent, inactive,” Dr. Tanzi, associate clinical professor of dermatology at George Washington University, Washington, DC, said at the Controversies and Conversations in Laser and Cosmetic Surgery symposium. “They don’t make as many growth factors, particularly IGF-1, and therefore we don’t stimulate the responses. We need more of our growth factors.”
In later, separate work, Dr. Travers, Dr. Spandau, and colleagues found that using dermabrasion or fractionated laser resurfacing to wound the skin can result in increased dermal IGF-1 levels and normalization of the abnormal pro-carcinogenic UV response associated with geriatric skin — a treatment that has the potential to prevent NMSC. That study “was the epiphany” for fostering interest among researchers in the field of lasers and medicine, Dr. Tanzi said.
In a retrospective cohort study, Mathew Avram, MD, JD, and colleagues reviewed patients with a history of facial keratinocyte carcinoma (KC) who were treated at Massachusetts General Hospital in Boston between 2005 and 2021. The study population included 43 patients treated with either the 1927- or the 1550-nm nonablative fractional laser (NAFL) and 52 matched controls. The rate of subsequent facial KC development was 20.9% in NAFL-treated patients and 40.4% in controls (relative risk, 0.52, P = .049).
During a separate presentation at the meeting, Dr. Avram, director of lasers and cosmetics at Massachusetts General Hospital, Boston, said that, when he and his colleagues controlled for age, gender, and skin type, controls were 2.65 times more likely to develop new facial KC, compared with those treated with NAFL (P = .0169). “This enhanced effect was seen with the 1550-nm device, compared with the 1927-nm device. The study shows us that 1550-nm/1927-nm NAFL may have a protective effect for patients with a history of KC, but the role of each wavelength is to be determined. We also need a prospective, controlled study to verify the results.”
In an ongoing study first presented at the 2023 annual meeting of the American Society for Dermatologic Surgery, Dr. Tanzi and colleagues enrolled 15 patients aged ≥ 55 years to evaluate the restoration of physiologic features and biomarkers in skin treated with 25% trichloroacetic acid (TCA), plus the 1550-nm or 1927-nm NAFL. Four sites on the back were treated and biopsies were taken at baseline and at 3 months post treatment. The protocol involved TCA 25% to speckled frost, with the 1550-nm device set to level 6 at 70 mJ and the 1927-nm device set to level 8 at 20 mJ. Immunohistochemical stains are still pending; however, physiologic changes were noted.
Three months after a single treatment, the 1927-nm treated areas showed statistically significant elongation of fibroblasts (consistent with younger fibroblasts) on histology. “Although not a large study, it supports the growing body of research that demonstrates we are improving the health of our patients’ skin with certain types of laser treatments, not just beautifying it,” Dr. Tanzi said.
Dr. Tanzi disclosed being a member of the advisory board for AbbVie/Allergan and Sciton, and is a consultant for Alastin/Galderma, Candesant Biomedical, Cytrellis, Revance, and Solta Medical. Dr. Avram disclosed that he receives intellectual property royalties from and holds stock options in Cytrellis, and is a consultant to Allergan and holds stock options in BAI Biosciences, Sofwave, and La Jolla NanoMedical.
A version of this article first appeared on Medscape.com.