Colon and Rectal

TOPLINE:

Stereotactic body radiotherapy (SBRT) is a safe treatment option for patients with oligometastatic cancer, with only 0.5% of patients experiencing severe acute toxicities within 6 months, according to a large real-world analysis.

METHODOLOGY:

• Advances in cancer imaging have helped identify more patients with oligometastatic disease. Although the standard treatment approach typically involves systemic therapy such as chemotherapy and immunotherapy, SBRT has increasingly become an option for these patients. However, the toxicities associated with SBRT remain less clear.
• OligoCare, a European, prospective, registry-based, single-arm observational study, aims to provide real-world outcomes among patients with oligometastatic cancer who received SBRT. In this analysis, the researchers evaluated early toxicities among 1468 patients with different primary cancers — non–small cell lung cancer (NSCLC; 19.7%), colorectal cancer (20%), breast cancer (15.5%), and prostate cancer (44.8%).
• The primary outcome was acute toxicities, including new malignancies and deaths, within 6 months of initiating SBRT.
• Overall, 527 (35.9%) patients received concomitant systemic treatment and 828 (56%) had de novo oligometastatic disease.

TAKEAWAY:

• Overall, though, only eight patients (0.5%) experienced acute SBRT-related toxicity of grade 3 and above within 6 months; two events, however, were fatal (pneumonitis and cerebral hemorrhage), and both occurred in patients with NSCLC.
• The other six grade 3 events included one instance of each of the following: empyema, pneumonia, radiation pneumonitis, radiation skin injury, decreased appetite, and bone pain. Two of these events occurred in patients with NSCLC, two in patients with breast cancer, one in patients with colorectal cancer, and one in patients with prostate cancer.
• New primary malignancies were reported in 13 (0.9%) patients, which included bladder cancer (n = 3), nonmelanoma skin cancer (n = 3), and leukemia (n = 1).
• Overall, 43 (2.9%) patients died within 6 months, most from their primary cancer (58.1%).

IN PRACTICE:

Low rates of early acute toxicities reported in this real-world study help confirm the safety of SBRT in the treatment of oligometastases, the authors concluded. However, “some anatomical sites might be associated with an increased risk of even severe or fatal toxicities.”

SOURCE:

The study, led by Filippo Alongi, Advanced Radiation Oncology Department, IRCCS Sacro Cuore Don Calabria Hospital, Cancer Care Center, Negrar di Valpolicella, Italy, and University of Brescia, also in Italy, was published online in Radiotherapy & Oncology .

LIMITATIONS:

Some limitations of the study include the nonrandomized design and potential variability in patient selection criteria, treatment doses, and schedules.

DISCLOSURES:

The study did not receive any funding support. Two authors declared receiving speaker or lecture honoraria or consultation fees from various sources.

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:

Stereotactic body radiotherapy (SBRT) is a safe treatment option for patients with oligometastatic cancer, with only 0.5% of patients experiencing severe acute toxicities within 6 months, according to a large real-world analysis.

METHODOLOGY:

• Advances in cancer imaging have helped identify more patients with oligometastatic disease. Although the standard treatment approach typically involves systemic therapy such as chemotherapy and immunotherapy, SBRT has increasingly become an option for these patients. However, the toxicities associated with SBRT remain less clear.
• OligoCare, a European, prospective, registry-based, single-arm observational study, aims to provide real-world outcomes among patients with oligometastatic cancer who received SBRT. In this analysis, the researchers evaluated early toxicities among 1468 patients with different primary cancers — non–small cell lung cancer (NSCLC; 19.7%), colorectal cancer (20%), breast cancer (15.5%), and prostate cancer (44.8%).
• The primary outcome was acute toxicities, including new malignancies and deaths, within 6 months of initiating SBRT.
• Overall, 527 (35.9%) patients received concomitant systemic treatment and 828 (56%) had de novo oligometastatic disease.

TAKEAWAY:

• Overall, though, only eight patients (0.5%) experienced acute SBRT-related toxicity of grade 3 and above within 6 months; two events, however, were fatal (pneumonitis and cerebral hemorrhage), and both occurred in patients with NSCLC.
• The other six grade 3 events included one instance of each of the following: empyema, pneumonia, radiation pneumonitis, radiation skin injury, decreased appetite, and bone pain. Two of these events occurred in patients with NSCLC, two in patients with breast cancer, one in patients with colorectal cancer, and one in patients with prostate cancer.
• New primary malignancies were reported in 13 (0.9%) patients, which included bladder cancer (n = 3), nonmelanoma skin cancer (n = 3), and leukemia (n = 1).
• Overall, 43 (2.9%) patients died within 6 months, most from their primary cancer (58.1%).

IN PRACTICE:

Low rates of early acute toxicities reported in this real-world study help confirm the safety of SBRT in the treatment of oligometastases, the authors concluded. However, “some anatomical sites might be associated with an increased risk of even severe or fatal toxicities.”

SOURCE:

The study, led by Filippo Alongi, Advanced Radiation Oncology Department, IRCCS Sacro Cuore Don Calabria Hospital, Cancer Care Center, Negrar di Valpolicella, Italy, and University of Brescia, also in Italy, was published online in Radiotherapy & Oncology .

LIMITATIONS:

Some limitations of the study include the nonrandomized design and potential variability in patient selection criteria, treatment doses, and schedules.

DISCLOSURES:

The study did not receive any funding support. Two authors declared receiving speaker or lecture honoraria or consultation fees from various sources.

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:

Stereotactic body radiotherapy (SBRT) is a safe treatment option for patients with oligometastatic cancer, with only 0.5% of patients experiencing severe acute toxicities within 6 months, according to a large real-world analysis.

METHODOLOGY:

• Advances in cancer imaging have helped identify more patients with oligometastatic disease. Although the standard treatment approach typically involves systemic therapy such as chemotherapy and immunotherapy, SBRT has increasingly become an option for these patients. However, the toxicities associated with SBRT remain less clear.
• OligoCare, a European, prospective, registry-based, single-arm observational study, aims to provide real-world outcomes among patients with oligometastatic cancer who received SBRT. In this analysis, the researchers evaluated early toxicities among 1468 patients with different primary cancers — non–small cell lung cancer (NSCLC; 19.7%), colorectal cancer (20%), breast cancer (15.5%), and prostate cancer (44.8%).
• The primary outcome was acute toxicities, including new malignancies and deaths, within 6 months of initiating SBRT.
• Overall, 527 (35.9%) patients received concomitant systemic treatment and 828 (56%) had de novo oligometastatic disease.

TAKEAWAY:

• Overall, though, only eight patients (0.5%) experienced acute SBRT-related toxicity of grade 3 and above within 6 months; two events, however, were fatal (pneumonitis and cerebral hemorrhage), and both occurred in patients with NSCLC.
• The other six grade 3 events included one instance of each of the following: empyema, pneumonia, radiation pneumonitis, radiation skin injury, decreased appetite, and bone pain. Two of these events occurred in patients with NSCLC, two in patients with breast cancer, one in patients with colorectal cancer, and one in patients with prostate cancer.
• New primary malignancies were reported in 13 (0.9%) patients, which included bladder cancer (n = 3), nonmelanoma skin cancer (n = 3), and leukemia (n = 1).
• Overall, 43 (2.9%) patients died within 6 months, most from their primary cancer (58.1%).

IN PRACTICE:

Low rates of early acute toxicities reported in this real-world study help confirm the safety of SBRT in the treatment of oligometastases, the authors concluded. However, “some anatomical sites might be associated with an increased risk of even severe or fatal toxicities.”

SOURCE:

The study, led by Filippo Alongi, Advanced Radiation Oncology Department, IRCCS Sacro Cuore Don Calabria Hospital, Cancer Care Center, Negrar di Valpolicella, Italy, and University of Brescia, also in Italy, was published online in Radiotherapy & Oncology .

LIMITATIONS:

Some limitations of the study include the nonrandomized design and potential variability in patient selection criteria, treatment doses, and schedules.

DISCLOSURES:

The study did not receive any funding support. Two authors declared receiving speaker or lecture honoraria or consultation fees from various sources.

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:

Fecal immunochemical test (FIT) screening reduces colorectal cancer (CRC) mortality by 33% overall, with a notable 42% reduction in deaths from left colon and rectal cancers, new data show.

METHODOLOGY:

• In the United States, annual FIT screening is recommended among average-risk adults to reduce the risk for death from CRC, but evidence on its effectiveness is limited.
• Researchers performed a nested case-control study within two large, demographically diverse health systems with long-standing programs of mailing FITs to promote CRC screening efforts.
• They compared 1103 adults who had died of CRC between 2011 and 2017 (cases) with 9608 matched, randomly selected people who were alive and free of CRC (controls).
• Analyses focused on FIT screening completed within 5 years before CRC diagnosis for cases or the corresponding date for controls.
• The primary outcome measured was CRC death overall and by tumor location; secondary analyses assessed CRC death by race and ethnicity.

TAKEAWAY:

• In regression analysis, completing one or more FIT screenings was associated with a 33% lower risk for CRC death overall.
• There was a 42% lower risk for death from left colon and rectum cancers but no significant reduction in mortality from right colon cancers.
• The benefits of FIT screening were observed across racial and ethnic groups, with significant mortality reductions of 63% in non-Hispanic Asian, 42% in non-Hispanic Black, and 29% in non-Hispanic White individuals.

IN PRACTICE:

“The findings support the use of strategies for coordinated and equitable large-scale population-based delivery of FIT screening with follow-up of abnormal screening results to help avert preventable premature CRC deaths,” the authors wrote.

SOURCE:

The study, with first author Chyke A. Doubeni, MD, MPH, Center for Health Equity, The Ohio State University Wexner Medical Center, Columbus, Ohio, was published online in JAMA Network Open.

LIMITATIONS:

Almost one half of study subjects had completed two or more FITs, but the case-control design was not suitable for assessing the impact of repeated screening. The study was conducted prior to the US Preventive Services Task Force recommendation to start screening at age 45 years, so the findings may not directly apply to adults aged 45-49 years. 

DISCLOSURES:

The study was funded by the National Cancer Institute. Dr. Doubeni reported receiving royalties from UpToDate, and additional authors reported receiving grants outside the submitted work. No other disclosures were reported.

A version of this article first appeared on Medscape.com.

TOPLINE:

Fecal immunochemical test (FIT) screening reduces colorectal cancer (CRC) mortality by 33% overall, with a notable 42% reduction in deaths from left colon and rectal cancers, new data show.

METHODOLOGY:

• In the United States, annual FIT screening is recommended among average-risk adults to reduce the risk for death from CRC, but evidence on its effectiveness is limited.
• Researchers performed a nested case-control study within two large, demographically diverse health systems with long-standing programs of mailing FITs to promote CRC screening efforts.
• They compared 1103 adults who had died of CRC between 2011 and 2017 (cases) with 9608 matched, randomly selected people who were alive and free of CRC (controls).
• Analyses focused on FIT screening completed within 5 years before CRC diagnosis for cases or the corresponding date for controls.
• The primary outcome measured was CRC death overall and by tumor location; secondary analyses assessed CRC death by race and ethnicity.

TAKEAWAY:

• In regression analysis, completing one or more FIT screenings was associated with a 33% lower risk for CRC death overall.
• There was a 42% lower risk for death from left colon and rectum cancers but no significant reduction in mortality from right colon cancers.
• The benefits of FIT screening were observed across racial and ethnic groups, with significant mortality reductions of 63% in non-Hispanic Asian, 42% in non-Hispanic Black, and 29% in non-Hispanic White individuals.

IN PRACTICE:

“The findings support the use of strategies for coordinated and equitable large-scale population-based delivery of FIT screening with follow-up of abnormal screening results to help avert preventable premature CRC deaths,” the authors wrote.

SOURCE:

The study, with first author Chyke A. Doubeni, MD, MPH, Center for Health Equity, The Ohio State University Wexner Medical Center, Columbus, Ohio, was published online in JAMA Network Open.

LIMITATIONS:

Almost one half of study subjects had completed two or more FITs, but the case-control design was not suitable for assessing the impact of repeated screening. The study was conducted prior to the US Preventive Services Task Force recommendation to start screening at age 45 years, so the findings may not directly apply to adults aged 45-49 years. 

DISCLOSURES:

The study was funded by the National Cancer Institute. Dr. Doubeni reported receiving royalties from UpToDate, and additional authors reported receiving grants outside the submitted work. No other disclosures were reported.

A version of this article first appeared on Medscape.com.

TOPLINE:

Fecal immunochemical test (FIT) screening reduces colorectal cancer (CRC) mortality by 33% overall, with a notable 42% reduction in deaths from left colon and rectal cancers, new data show.

METHODOLOGY:

• In the United States, annual FIT screening is recommended among average-risk adults to reduce the risk for death from CRC, but evidence on its effectiveness is limited.
• Researchers performed a nested case-control study within two large, demographically diverse health systems with long-standing programs of mailing FITs to promote CRC screening efforts.
• They compared 1103 adults who had died of CRC between 2011 and 2017 (cases) with 9608 matched, randomly selected people who were alive and free of CRC (controls).
• Analyses focused on FIT screening completed within 5 years before CRC diagnosis for cases or the corresponding date for controls.
• The primary outcome measured was CRC death overall and by tumor location; secondary analyses assessed CRC death by race and ethnicity.

TAKEAWAY:

• In regression analysis, completing one or more FIT screenings was associated with a 33% lower risk for CRC death overall.
• There was a 42% lower risk for death from left colon and rectum cancers but no significant reduction in mortality from right colon cancers.
• The benefits of FIT screening were observed across racial and ethnic groups, with significant mortality reductions of 63% in non-Hispanic Asian, 42% in non-Hispanic Black, and 29% in non-Hispanic White individuals.

IN PRACTICE:

“The findings support the use of strategies for coordinated and equitable large-scale population-based delivery of FIT screening with follow-up of abnormal screening results to help avert preventable premature CRC deaths,” the authors wrote.

SOURCE:

The study, with first author Chyke A. Doubeni, MD, MPH, Center for Health Equity, The Ohio State University Wexner Medical Center, Columbus, Ohio, was published online in JAMA Network Open.

LIMITATIONS:

Almost one half of study subjects had completed two or more FITs, but the case-control design was not suitable for assessing the impact of repeated screening. The study was conducted prior to the US Preventive Services Task Force recommendation to start screening at age 45 years, so the findings may not directly apply to adults aged 45-49 years. 

DISCLOSURES:

The study was funded by the National Cancer Institute. Dr. Doubeni reported receiving royalties from UpToDate, and additional authors reported receiving grants outside the submitted work. No other disclosures were reported.

A version of this article first appeared on Medscape.com.

TOPLINE:

A novel method combining genetic variants, symptoms, and patient characteristics is moderately successful at predicting which primary care patients are at high risk of developing colorectal cancer (CRC) within the next 2 years — without the benefit of a faecal immunochemical test (FIT). Up to 16% of primary care patients are non-compliant with FIT, which is the gold standard for predicting CRC.

METHODOLOGY:

• This study was retrospective cohort of 50,387 UK Biobank participants reporting a CRC symptom in primary care at age ≥ 40 years.
• The novel method, called an integrated risk model, used a combination of a polygenic risk score from genetic testing, symptoms, and patient characteristics to identify patients likely to develop CRC in the next 2 years.
• The primary outcome was the risk model’s performance in classifying a CRC case according to a statistical metric, the receiver operating characteristic area under the curve. Values range from 0 to 1, where 1 indicates perfect discriminative power and 0.5 indicates no discriminative power.

TAKEAWAY:

• The cohort of 50,387 participants was found to have 438 cases of CRC and 49,949 controls without CRC within 2 years of symptom reporting. CRC cases were diagnosed by hospital records, cancer registries, or death records.
• Increased risk of a CRC diagnosis was identified by a combination of six variables: older age at index date of symptom, higher polygenic risk score, which included 201 variants, male sex, previous smoking, rectal bleeding, and change in bowel habit.
• The polygenic risk score alone had good ability to distinguish cases from controls because 1.45% of participants in the highest quintile and 0.42% in the lowest quintile were later diagnosed with CRC.
• The variables were used to calculate an integrated risk model, which estimated the cross-sectional risk (in 80% of the final cohort) of a subsequent CRC diagnosis within 2 years. The highest scoring integrated risk model in this study was found to have a receiver operating characteristic area under the curve value of 0.76 with a 95% CI of 0.71-0.81. (A value of this magnitude indicates moderate discriminative ability to distinguish cases from controls because it falls between 0.7 and 0.8. A higher value [above 0.8] is considered strong and a lower value [< 0.7] is considered weak.)

IN PRACTICE:

The authors concluded, “The [integrated risk model] developed in this study predicts, with good accuracy, which patients presenting with CRC symptoms in a primary care setting are likely to be diagnosed with CRC within the next 2 years.”

The integrated risk model has “potential to be immediately actionable in the clinical setting … [by] inform[ing] patient triage, improving early diagnostic rates and health outcomes and reducing pressure on diagnostic secondary care services.”

SOURCE:

The corresponding author is Harry D. Green of the University of Exeter, England. The study (2024 Aug 1. doi: 10.1038/s41431-024-01654-3) appeared in the European Journal of Human Genetics.

LIMITATIONS:

Limitations included an observational design and the inability of the integrated risk model to outperform FIT, which has a receiver operating characteristic area under the curve of 0.95.

DISCLOSURES:

None of the authors reported competing interests. The funding sources included the National Institute for Health and Care Research and others.

A version of this article first appeared on Medscape.com.

TOPLINE:

A novel method combining genetic variants, symptoms, and patient characteristics is moderately successful at predicting which primary care patients are at high risk of developing colorectal cancer (CRC) within the next 2 years — without the benefit of a faecal immunochemical test (FIT). Up to 16% of primary care patients are non-compliant with FIT, which is the gold standard for predicting CRC.

METHODOLOGY:

• This study was retrospective cohort of 50,387 UK Biobank participants reporting a CRC symptom in primary care at age ≥ 40 years.
• The novel method, called an integrated risk model, used a combination of a polygenic risk score from genetic testing, symptoms, and patient characteristics to identify patients likely to develop CRC in the next 2 years.
• The primary outcome was the risk model’s performance in classifying a CRC case according to a statistical metric, the receiver operating characteristic area under the curve. Values range from 0 to 1, where 1 indicates perfect discriminative power and 0.5 indicates no discriminative power.

TAKEAWAY:

• The cohort of 50,387 participants was found to have 438 cases of CRC and 49,949 controls without CRC within 2 years of symptom reporting. CRC cases were diagnosed by hospital records, cancer registries, or death records.
• Increased risk of a CRC diagnosis was identified by a combination of six variables: older age at index date of symptom, higher polygenic risk score, which included 201 variants, male sex, previous smoking, rectal bleeding, and change in bowel habit.
• The polygenic risk score alone had good ability to distinguish cases from controls because 1.45% of participants in the highest quintile and 0.42% in the lowest quintile were later diagnosed with CRC.
• The variables were used to calculate an integrated risk model, which estimated the cross-sectional risk (in 80% of the final cohort) of a subsequent CRC diagnosis within 2 years. The highest scoring integrated risk model in this study was found to have a receiver operating characteristic area under the curve value of 0.76 with a 95% CI of 0.71-0.81. (A value of this magnitude indicates moderate discriminative ability to distinguish cases from controls because it falls between 0.7 and 0.8. A higher value [above 0.8] is considered strong and a lower value [< 0.7] is considered weak.)

IN PRACTICE:

The authors concluded, “The [integrated risk model] developed in this study predicts, with good accuracy, which patients presenting with CRC symptoms in a primary care setting are likely to be diagnosed with CRC within the next 2 years.”

The integrated risk model has “potential to be immediately actionable in the clinical setting … [by] inform[ing] patient triage, improving early diagnostic rates and health outcomes and reducing pressure on diagnostic secondary care services.”

SOURCE:

The corresponding author is Harry D. Green of the University of Exeter, England. The study (2024 Aug 1. doi: 10.1038/s41431-024-01654-3) appeared in the European Journal of Human Genetics.

LIMITATIONS:

Limitations included an observational design and the inability of the integrated risk model to outperform FIT, which has a receiver operating characteristic area under the curve of 0.95.

DISCLOSURES:

None of the authors reported competing interests. The funding sources included the National Institute for Health and Care Research and others.

A version of this article first appeared on Medscape.com.

TOPLINE:

A novel method combining genetic variants, symptoms, and patient characteristics is moderately successful at predicting which primary care patients are at high risk of developing colorectal cancer (CRC) within the next 2 years — without the benefit of a faecal immunochemical test (FIT). Up to 16% of primary care patients are non-compliant with FIT, which is the gold standard for predicting CRC.

METHODOLOGY:

• This study was retrospective cohort of 50,387 UK Biobank participants reporting a CRC symptom in primary care at age ≥ 40 years.
• The novel method, called an integrated risk model, used a combination of a polygenic risk score from genetic testing, symptoms, and patient characteristics to identify patients likely to develop CRC in the next 2 years.
• The primary outcome was the risk model’s performance in classifying a CRC case according to a statistical metric, the receiver operating characteristic area under the curve. Values range from 0 to 1, where 1 indicates perfect discriminative power and 0.5 indicates no discriminative power.

TAKEAWAY:

• The cohort of 50,387 participants was found to have 438 cases of CRC and 49,949 controls without CRC within 2 years of symptom reporting. CRC cases were diagnosed by hospital records, cancer registries, or death records.
• Increased risk of a CRC diagnosis was identified by a combination of six variables: older age at index date of symptom, higher polygenic risk score, which included 201 variants, male sex, previous smoking, rectal bleeding, and change in bowel habit.
• The polygenic risk score alone had good ability to distinguish cases from controls because 1.45% of participants in the highest quintile and 0.42% in the lowest quintile were later diagnosed with CRC.
• The variables were used to calculate an integrated risk model, which estimated the cross-sectional risk (in 80% of the final cohort) of a subsequent CRC diagnosis within 2 years. The highest scoring integrated risk model in this study was found to have a receiver operating characteristic area under the curve value of 0.76 with a 95% CI of 0.71-0.81. (A value of this magnitude indicates moderate discriminative ability to distinguish cases from controls because it falls between 0.7 and 0.8. A higher value [above 0.8] is considered strong and a lower value [< 0.7] is considered weak.)

IN PRACTICE:

The authors concluded, “The [integrated risk model] developed in this study predicts, with good accuracy, which patients presenting with CRC symptoms in a primary care setting are likely to be diagnosed with CRC within the next 2 years.”

The integrated risk model has “potential to be immediately actionable in the clinical setting … [by] inform[ing] patient triage, improving early diagnostic rates and health outcomes and reducing pressure on diagnostic secondary care services.”

SOURCE:

The corresponding author is Harry D. Green of the University of Exeter, England. The study (2024 Aug 1. doi: 10.1038/s41431-024-01654-3) appeared in the European Journal of Human Genetics.

LIMITATIONS:

Limitations included an observational design and the inability of the integrated risk model to outperform FIT, which has a receiver operating characteristic area under the curve of 0.95.

DISCLOSURES:

None of the authors reported competing interests. The funding sources included the National Institute for Health and Care Research and others.

A version of this article first appeared on Medscape.com.

A new stool-based syndecan-2 methylation (mSDC2) test may improve the detection of colorectal cancer (CRC) and advanced colorectal neoplasia (ACN), based on a prospective, real-world study.

These findings suggest that the mSDC2 assay could improve the efficacy and resource utilization of existing screening programs, reported co–lead authors Shengbing Zhao, MD and Zixuan He, MD, of Naval Medical University, Shanghai, China, and colleagues.

“Conventional risk-stratification strategies, such as fecal immunochemical test (FIT) and life risk factors, are still criticized for being inferior at identifying early-stage CRC and ACN, and their real-world performance is probably further weakened by the low annual participation rate and compliance of subsequent colonoscopy,” the investigators wrote in Gastroenterology. Recent case studies have reported “high diagnostic performance” using stool-based testing for mSDC2, which is “the most accurate single-targeted gene” for colorectal neoplasia, according to the investigators; however, real-world outcomes have yet to be demonstrated, prompting the present study. The prospective, multicenter, community-based trial compared the diagnostic performance of the mSDC2 test against FIT and Asia-Pacific Colorectal Screening (APCS) scores.

The primary outcome was detection of ACN. Secondary outcomes included detection of CRC, early-stage CRC, ACN, colorectal neoplasia (CN), and clinically relevant serrated polyp (CRSP). Screening strategies were also compared in terms of cost-effectiveness and impact on colonoscopy workload.The final dataset included 10,360 participants aged 45-75 years who underwent screening between 2020 and 2022.

After determining APCS scores, stool samples were analyzed for mSDC2 and FIT markers. Based on risk stratification results, participants were invited to undergo colonoscopy. A total of 3,381 participants completed colonoscopy, with 1914 from the increased-risk population and 1467 from the average-risk population. Participants who tested positive for mSDC2 had significantly higher detection rates for all measured outcomes than those who tested negative (all, P < .05). For example, the detection rate for ACN was 26.6% in mSDC2-positive participants, compared with 9.3% in mSDC2-negative participants, with a relative risk of 2.87 (95% CI, 2.39-3.44). For CRC, the detection rate was 4.2% in mSDC2-positive participants vs 0.1% in mSDC2-negative participants, yielding a relative risk of 29.73 (95% CI, 10.29-85.91). Performance held steady across subgroups.The mSDC2 test demonstrated cost-effectiveness by significantly reducing the number of colonoscopies needed to detect one case of ACN or CRC. Specifically, the number of colonoscopies needed to screen for ACN and CRC was reduced by 56.2% and 81.5%, respectively. Parallel combinations of mSDC2 with APCS or FIT enhanced both diagnostic performance and cost-effectiveness.

“This study further illustrates that the mSDC2 test consistently improves predictive abilities for CN, CRSP, ACN, and CRC, which is not influenced by subgroups of lesion location or risk factors, even under the risk stratification by FIT or APCS,” the investigators wrote. “The excellent diagnostic ability of mSDC2 in premalignant lesions, early-stage CRC, and early-onset CRC indicates a promising value in early detection and prevention of CRC ... the mSDC2 test or a parallel combination of multiple screening methods might be promising to improve real-world CRC screening performance and reduce colonoscopy workload in community practice.”The study was supported by the National Key Research and Development Program of China, Deep Blue Project of Naval Medical University, the Creative Biosciences, and others. The investigators reported no conflicts of interest.

A new stool-based syndecan-2 methylation (mSDC2) test may improve the detection of colorectal cancer (CRC) and advanced colorectal neoplasia (ACN), based on a prospective, real-world study.

These findings suggest that the mSDC2 assay could improve the efficacy and resource utilization of existing screening programs, reported co–lead authors Shengbing Zhao, MD and Zixuan He, MD, of Naval Medical University, Shanghai, China, and colleagues.

“Conventional risk-stratification strategies, such as fecal immunochemical test (FIT) and life risk factors, are still criticized for being inferior at identifying early-stage CRC and ACN, and their real-world performance is probably further weakened by the low annual participation rate and compliance of subsequent colonoscopy,” the investigators wrote in Gastroenterology. Recent case studies have reported “high diagnostic performance” using stool-based testing for mSDC2, which is “the most accurate single-targeted gene” for colorectal neoplasia, according to the investigators; however, real-world outcomes have yet to be demonstrated, prompting the present study. The prospective, multicenter, community-based trial compared the diagnostic performance of the mSDC2 test against FIT and Asia-Pacific Colorectal Screening (APCS) scores.

The primary outcome was detection of ACN. Secondary outcomes included detection of CRC, early-stage CRC, ACN, colorectal neoplasia (CN), and clinically relevant serrated polyp (CRSP). Screening strategies were also compared in terms of cost-effectiveness and impact on colonoscopy workload.The final dataset included 10,360 participants aged 45-75 years who underwent screening between 2020 and 2022.

After determining APCS scores, stool samples were analyzed for mSDC2 and FIT markers. Based on risk stratification results, participants were invited to undergo colonoscopy. A total of 3,381 participants completed colonoscopy, with 1914 from the increased-risk population and 1467 from the average-risk population. Participants who tested positive for mSDC2 had significantly higher detection rates for all measured outcomes than those who tested negative (all, P < .05). For example, the detection rate for ACN was 26.6% in mSDC2-positive participants, compared with 9.3% in mSDC2-negative participants, with a relative risk of 2.87 (95% CI, 2.39-3.44). For CRC, the detection rate was 4.2% in mSDC2-positive participants vs 0.1% in mSDC2-negative participants, yielding a relative risk of 29.73 (95% CI, 10.29-85.91). Performance held steady across subgroups.The mSDC2 test demonstrated cost-effectiveness by significantly reducing the number of colonoscopies needed to detect one case of ACN or CRC. Specifically, the number of colonoscopies needed to screen for ACN and CRC was reduced by 56.2% and 81.5%, respectively. Parallel combinations of mSDC2 with APCS or FIT enhanced both diagnostic performance and cost-effectiveness.

“This study further illustrates that the mSDC2 test consistently improves predictive abilities for CN, CRSP, ACN, and CRC, which is not influenced by subgroups of lesion location or risk factors, even under the risk stratification by FIT or APCS,” the investigators wrote. “The excellent diagnostic ability of mSDC2 in premalignant lesions, early-stage CRC, and early-onset CRC indicates a promising value in early detection and prevention of CRC ... the mSDC2 test or a parallel combination of multiple screening methods might be promising to improve real-world CRC screening performance and reduce colonoscopy workload in community practice.”The study was supported by the National Key Research and Development Program of China, Deep Blue Project of Naval Medical University, the Creative Biosciences, and others. The investigators reported no conflicts of interest.

A new stool-based syndecan-2 methylation (mSDC2) test may improve the detection of colorectal cancer (CRC) and advanced colorectal neoplasia (ACN), based on a prospective, real-world study.

These findings suggest that the mSDC2 assay could improve the efficacy and resource utilization of existing screening programs, reported co–lead authors Shengbing Zhao, MD and Zixuan He, MD, of Naval Medical University, Shanghai, China, and colleagues.

“Conventional risk-stratification strategies, such as fecal immunochemical test (FIT) and life risk factors, are still criticized for being inferior at identifying early-stage CRC and ACN, and their real-world performance is probably further weakened by the low annual participation rate and compliance of subsequent colonoscopy,” the investigators wrote in Gastroenterology. Recent case studies have reported “high diagnostic performance” using stool-based testing for mSDC2, which is “the most accurate single-targeted gene” for colorectal neoplasia, according to the investigators; however, real-world outcomes have yet to be demonstrated, prompting the present study. The prospective, multicenter, community-based trial compared the diagnostic performance of the mSDC2 test against FIT and Asia-Pacific Colorectal Screening (APCS) scores.

The primary outcome was detection of ACN. Secondary outcomes included detection of CRC, early-stage CRC, ACN, colorectal neoplasia (CN), and clinically relevant serrated polyp (CRSP). Screening strategies were also compared in terms of cost-effectiveness and impact on colonoscopy workload.The final dataset included 10,360 participants aged 45-75 years who underwent screening between 2020 and 2022.

After determining APCS scores, stool samples were analyzed for mSDC2 and FIT markers. Based on risk stratification results, participants were invited to undergo colonoscopy. A total of 3,381 participants completed colonoscopy, with 1914 from the increased-risk population and 1467 from the average-risk population. Participants who tested positive for mSDC2 had significantly higher detection rates for all measured outcomes than those who tested negative (all, P < .05). For example, the detection rate for ACN was 26.6% in mSDC2-positive participants, compared with 9.3% in mSDC2-negative participants, with a relative risk of 2.87 (95% CI, 2.39-3.44). For CRC, the detection rate was 4.2% in mSDC2-positive participants vs 0.1% in mSDC2-negative participants, yielding a relative risk of 29.73 (95% CI, 10.29-85.91). Performance held steady across subgroups.The mSDC2 test demonstrated cost-effectiveness by significantly reducing the number of colonoscopies needed to detect one case of ACN or CRC. Specifically, the number of colonoscopies needed to screen for ACN and CRC was reduced by 56.2% and 81.5%, respectively. Parallel combinations of mSDC2 with APCS or FIT enhanced both diagnostic performance and cost-effectiveness.

“This study further illustrates that the mSDC2 test consistently improves predictive abilities for CN, CRSP, ACN, and CRC, which is not influenced by subgroups of lesion location or risk factors, even under the risk stratification by FIT or APCS,” the investigators wrote. “The excellent diagnostic ability of mSDC2 in premalignant lesions, early-stage CRC, and early-onset CRC indicates a promising value in early detection and prevention of CRC ... the mSDC2 test or a parallel combination of multiple screening methods might be promising to improve real-world CRC screening performance and reduce colonoscopy workload in community practice.”The study was supported by the National Key Research and Development Program of China, Deep Blue Project of Naval Medical University, the Creative Biosciences, and others. The investigators reported no conflicts of interest.

In late July, the US Food and Drug Administration (FDA) approved the first use of a liquid biopsy (blood test) for colorectal cancer (CRC) screening. The test, called Shield, launched commercially the first week of August and is the first blood test to be approved by the FDA as a primary screening option for CRC that meets requirements for Medicare reimbursement.

While the convenience of a blood test could potentially encourage more people to get screened, expert consensus is that blood tests can’t prevent CRC and should not be considered a replacement for a colonoscopy. Modeling studies and expert consensus published earlier this year in Gastroenterology and in Clinical Gastroenterology and Hepatology shed light on the perils of liquid biopsy.

“Based on their current characteristics, blood tests should not be recommended to replace established colorectal cancer screening tests, since blood tests are neither as effective nor as cost-effective, and would worsen outcomes,” said David Lieberman, MD, AGAF, chair, AGA CRC Workshop chair and lead author of an expert commentary on liquid biopsy for CRC screening.

Five Key Takeaways

• A blood test for CRC that meets minimal CMS criteria for sensitivity and performed every 3 years would likely result in better outcomes than no screening.
• A blood test for CRC offers a simple process that could encourage more people to participate in screening. Patients who may have declined colonoscopy should understand the need for a colonoscopy if findings are abnormal.
• Because blood tests for CRC are predicted to be less effective and more costly than currently established screening programs, they cannot be recommended to replace established effective screening methods.
• Although blood tests would improve outcomes in currently unscreened people, substituting blood tests for a currently effective test would worsen patient outcomes and increase cost.
• Potential benchmarks that industry might use to assess an effective blood test for CRC going forward would be sensitivity for stage I-III CRC of > 90%, with sensitivity for advanced adenomas of > 40%-50%.

University of California San Diego

“Unless we have the expectation of high sensitivity and specificity, blood-based colorectal cancer tests could lead to false positive and false negative results, which are both bad for patient outcomes,” said John M. Carethers, MD, AGAF, AGA past president and vice chancellor for health sciences at the University of California San Diego.

In late July, the US Food and Drug Administration (FDA) approved the first use of a liquid biopsy (blood test) for colorectal cancer (CRC) screening. The test, called Shield, launched commercially the first week of August and is the first blood test to be approved by the FDA as a primary screening option for CRC that meets requirements for Medicare reimbursement.

While the convenience of a blood test could potentially encourage more people to get screened, expert consensus is that blood tests can’t prevent CRC and should not be considered a replacement for a colonoscopy. Modeling studies and expert consensus published earlier this year in Gastroenterology and in Clinical Gastroenterology and Hepatology shed light on the perils of liquid biopsy.

“Based on their current characteristics, blood tests should not be recommended to replace established colorectal cancer screening tests, since blood tests are neither as effective nor as cost-effective, and would worsen outcomes,” said David Lieberman, MD, AGAF, chair, AGA CRC Workshop chair and lead author of an expert commentary on liquid biopsy for CRC screening.

Five Key Takeaways

• A blood test for CRC that meets minimal CMS criteria for sensitivity and performed every 3 years would likely result in better outcomes than no screening.
• A blood test for CRC offers a simple process that could encourage more people to participate in screening. Patients who may have declined colonoscopy should understand the need for a colonoscopy if findings are abnormal.
• Because blood tests for CRC are predicted to be less effective and more costly than currently established screening programs, they cannot be recommended to replace established effective screening methods.
• Although blood tests would improve outcomes in currently unscreened people, substituting blood tests for a currently effective test would worsen patient outcomes and increase cost.
• Potential benchmarks that industry might use to assess an effective blood test for CRC going forward would be sensitivity for stage I-III CRC of > 90%, with sensitivity for advanced adenomas of > 40%-50%.

University of California San Diego

“Unless we have the expectation of high sensitivity and specificity, blood-based colorectal cancer tests could lead to false positive and false negative results, which are both bad for patient outcomes,” said John M. Carethers, MD, AGAF, AGA past president and vice chancellor for health sciences at the University of California San Diego.

In late July, the US Food and Drug Administration (FDA) approved the first use of a liquid biopsy (blood test) for colorectal cancer (CRC) screening. The test, called Shield, launched commercially the first week of August and is the first blood test to be approved by the FDA as a primary screening option for CRC that meets requirements for Medicare reimbursement.

While the convenience of a blood test could potentially encourage more people to get screened, expert consensus is that blood tests can’t prevent CRC and should not be considered a replacement for a colonoscopy. Modeling studies and expert consensus published earlier this year in Gastroenterology and in Clinical Gastroenterology and Hepatology shed light on the perils of liquid biopsy.

“Based on their current characteristics, blood tests should not be recommended to replace established colorectal cancer screening tests, since blood tests are neither as effective nor as cost-effective, and would worsen outcomes,” said David Lieberman, MD, AGAF, chair, AGA CRC Workshop chair and lead author of an expert commentary on liquid biopsy for CRC screening.

Five Key Takeaways

• A blood test for CRC that meets minimal CMS criteria for sensitivity and performed every 3 years would likely result in better outcomes than no screening.
• A blood test for CRC offers a simple process that could encourage more people to participate in screening. Patients who may have declined colonoscopy should understand the need for a colonoscopy if findings are abnormal.
• Because blood tests for CRC are predicted to be less effective and more costly than currently established screening programs, they cannot be recommended to replace established effective screening methods.
• Although blood tests would improve outcomes in currently unscreened people, substituting blood tests for a currently effective test would worsen patient outcomes and increase cost.
• Potential benchmarks that industry might use to assess an effective blood test for CRC going forward would be sensitivity for stage I-III CRC of > 90%, with sensitivity for advanced adenomas of > 40%-50%.

University of California San Diego

“Unless we have the expectation of high sensitivity and specificity, blood-based colorectal cancer tests could lead to false positive and false negative results, which are both bad for patient outcomes,” said John M. Carethers, MD, AGAF, AGA past president and vice chancellor for health sciences at the University of California San Diego.

The lowest point in the nascent career of Neelendu Dey, MD, helped seal his fate as a physician-scientist.

He had just started his first year as a resident at University of California, San Francisco. One of his patients was a 30-year-old woman who was dying of metastatic colorectal cancer. “I was in my mid-20s interacting with an individual just a few years older than I am, going through one of the most terrible health outcomes one could imagine,” Dr. Dey said.

He remembers asking the patient what he could do for her, how he could make her feel more comfortable. “That feeling of helplessness, particularly as we think about young people developing cancer, it really stuck with me through the years,” he said.

Dr. Dey, a graduate of the AGA Future Leaders Program, is now a gastroenterologist and researcher at the Fred Hutch Cancer Center in Seattle. In an interview, he talked about his dual role as a physician and scientist, and how those two interests are guiding his research in precancerous conditions of the colon.

Cases like that of the young woman with colon cancer “really help drive the urgency of the work we do, and the research questions we ask, as we try to move the ball forward and help folks at earlier stages,” he said.

Fred Hutch Cancer Center

Q: Why did you choose GI?

When you think about what sorts of chronic diseases really impact your quality of life, gut health is one of the chief contributors among various aspects of health. And that really appealed to me — the ability to take someone who is essentially handicapped by a series of illnesses and symptoms that derive from the GI tract and enable them to return to the person they want to be, to be productive in the way that they want to be, and have a rewarding life.

As I thought about how I wanted to contribute to the future of medicine, one of the ways in which I’ve always thought that I would do that is through research. When I considered the fields that really appealed to me, both from that clinical standpoint and research standpoint, GI was one that really stood out. There has been a lot of exciting research going on in GI. My lab currently studies the microbiome, and I feel like this is an area in which we can contribute.
 

Q: What role does digestive health play in overall health?

Obviously, the direct answer is gut health is so critical in something like nutritional intake. Some GI symptoms, if your gut health has gone awry, can really be detrimental in terms of quality of life. But one less obvious role that digestive health plays is its long-term effects. We’re starting to appreciate that gut health, the gut microbiome, and gut immune education are probably long-term players. Some experiences in early life might shape our immunity in ways that have consequences for us much later in life. Whether we get early life antibiotics, for example, may potentially contribute to colorectal cancer down the line. Thinking about the long-term players is more challenging, but it’s also an appealing opportunity as we think about how we can shape medicine moving forward.

Q: What practice challenges have you faced in your career?

First, being a physician-scientist. It’s challenging to be either a physician alone or to be a researcher alone. And trying to do both includes the challenges of both individual worlds. It just takes more time to get all the prerequisite training. And second, there are just challenges with getting the opportunities to contribute in the ways that you want — to get the research funding, to get the papers out, things like that.

Q: Tell me about the work you’ve been doing in your lab to develop microbiome-based strategies for preventing and treating cancer.

The microbiome presents several opportunities when it comes to cancer prevention. One is identifying markers of cancer risk, or of general good health down the line. Some of those biomarkers could — potentially — feed directly into personalized risk assessment and maybe even inform a future screening strategy. The second opportunity the microbiome presents is if we identify a microbe that influences your cancer risk, can we then understand and exploit, or utilize, that mechanism to mitigate cancer risk in the future? Our lab has done work looking at subspecies levels of microbes that track with health or cancer. We’ve done some work to identify what these subspecies groupings are and have identified some links to certain precancerous changes in the colon. We think that there’s an opportunity here for future interventions.

Q: Have you published other papers?

We recently published another paper describing how some microbes can interact with a tumor suppressor gene and are influenced in a sex-biased manner to drive tumorigenesis in a mouse model. We think, based on what we’re seeing in human data, that there may be some relationships and we’re exploring that now as well. 

Q: What is your vision for the future in GI, and in your career?

The vision that I have is to create clinical tools that can expand our reach and our effectiveness and cancer prevention. I think that there are opportunities for leveraging microbiome research to accomplish this. And one outcome I could imagine is leveraging some of these insights to expand noninvasive screening at even earlier ages than we do now. I mean, we just dialed back the recommended age for colonoscopy for average risk individuals to 45. But I could envision a future in which noninvasive screening starts earlier, in which the first stool-based tests that we deploy to assess personalized risk are used in the pediatric clinic.

Lightning Round

Texting or talking?

Talking

Favorite city in the United States besides the one you live in?

St. Louis

Cat or dog person?

Both

If you weren’t a GI, what would you be?

Musician

Best place you went on vacation?

Borneo

Favorite sport?

Soccer

Favorite ice cream?

Cashew-based salted caramel

What song do you have to sing along with when you hear it?

Sweet Child of Mine

Favorite movie or TV show?

25th Hour or Shawshank Redemption

Optimist or Pessimist?

Optimist

The lowest point in the nascent career of Neelendu Dey, MD, helped seal his fate as a physician-scientist.

He had just started his first year as a resident at University of California, San Francisco. One of his patients was a 30-year-old woman who was dying of metastatic colorectal cancer. “I was in my mid-20s interacting with an individual just a few years older than I am, going through one of the most terrible health outcomes one could imagine,” Dr. Dey said.

He remembers asking the patient what he could do for her, how he could make her feel more comfortable. “That feeling of helplessness, particularly as we think about young people developing cancer, it really stuck with me through the years,” he said.

Dr. Dey, a graduate of the AGA Future Leaders Program, is now a gastroenterologist and researcher at the Fred Hutch Cancer Center in Seattle. In an interview, he talked about his dual role as a physician and scientist, and how those two interests are guiding his research in precancerous conditions of the colon.

Cases like that of the young woman with colon cancer “really help drive the urgency of the work we do, and the research questions we ask, as we try to move the ball forward and help folks at earlier stages,” he said.

Fred Hutch Cancer Center

Q: Why did you choose GI?

When you think about what sorts of chronic diseases really impact your quality of life, gut health is one of the chief contributors among various aspects of health. And that really appealed to me — the ability to take someone who is essentially handicapped by a series of illnesses and symptoms that derive from the GI tract and enable them to return to the person they want to be, to be productive in the way that they want to be, and have a rewarding life.

As I thought about how I wanted to contribute to the future of medicine, one of the ways in which I’ve always thought that I would do that is through research. When I considered the fields that really appealed to me, both from that clinical standpoint and research standpoint, GI was one that really stood out. There has been a lot of exciting research going on in GI. My lab currently studies the microbiome, and I feel like this is an area in which we can contribute.
 

Q: What role does digestive health play in overall health?

Obviously, the direct answer is gut health is so critical in something like nutritional intake. Some GI symptoms, if your gut health has gone awry, can really be detrimental in terms of quality of life. But one less obvious role that digestive health plays is its long-term effects. We’re starting to appreciate that gut health, the gut microbiome, and gut immune education are probably long-term players. Some experiences in early life might shape our immunity in ways that have consequences for us much later in life. Whether we get early life antibiotics, for example, may potentially contribute to colorectal cancer down the line. Thinking about the long-term players is more challenging, but it’s also an appealing opportunity as we think about how we can shape medicine moving forward.

Q: What practice challenges have you faced in your career?

First, being a physician-scientist. It’s challenging to be either a physician alone or to be a researcher alone. And trying to do both includes the challenges of both individual worlds. It just takes more time to get all the prerequisite training. And second, there are just challenges with getting the opportunities to contribute in the ways that you want — to get the research funding, to get the papers out, things like that.

Q: Tell me about the work you’ve been doing in your lab to develop microbiome-based strategies for preventing and treating cancer.

The microbiome presents several opportunities when it comes to cancer prevention. One is identifying markers of cancer risk, or of general good health down the line. Some of those biomarkers could — potentially — feed directly into personalized risk assessment and maybe even inform a future screening strategy. The second opportunity the microbiome presents is if we identify a microbe that influences your cancer risk, can we then understand and exploit, or utilize, that mechanism to mitigate cancer risk in the future? Our lab has done work looking at subspecies levels of microbes that track with health or cancer. We’ve done some work to identify what these subspecies groupings are and have identified some links to certain precancerous changes in the colon. We think that there’s an opportunity here for future interventions.

Q: Have you published other papers?

We recently published another paper describing how some microbes can interact with a tumor suppressor gene and are influenced in a sex-biased manner to drive tumorigenesis in a mouse model. We think, based on what we’re seeing in human data, that there may be some relationships and we’re exploring that now as well. 

Q: What is your vision for the future in GI, and in your career?

The vision that I have is to create clinical tools that can expand our reach and our effectiveness and cancer prevention. I think that there are opportunities for leveraging microbiome research to accomplish this. And one outcome I could imagine is leveraging some of these insights to expand noninvasive screening at even earlier ages than we do now. I mean, we just dialed back the recommended age for colonoscopy for average risk individuals to 45. But I could envision a future in which noninvasive screening starts earlier, in which the first stool-based tests that we deploy to assess personalized risk are used in the pediatric clinic.

Lightning Round

Texting or talking?

Talking

Favorite city in the United States besides the one you live in?

St. Louis

Cat or dog person?

Both

If you weren’t a GI, what would you be?

Musician

Best place you went on vacation?

Borneo

Favorite sport?

Soccer

Favorite ice cream?

Cashew-based salted caramel

What song do you have to sing along with when you hear it?

Sweet Child of Mine

Favorite movie or TV show?

25th Hour or Shawshank Redemption

Optimist or Pessimist?

Optimist

The lowest point in the nascent career of Neelendu Dey, MD, helped seal his fate as a physician-scientist.

He had just started his first year as a resident at University of California, San Francisco. One of his patients was a 30-year-old woman who was dying of metastatic colorectal cancer. “I was in my mid-20s interacting with an individual just a few years older than I am, going through one of the most terrible health outcomes one could imagine,” Dr. Dey said.

He remembers asking the patient what he could do for her, how he could make her feel more comfortable. “That feeling of helplessness, particularly as we think about young people developing cancer, it really stuck with me through the years,” he said.

Dr. Dey, a graduate of the AGA Future Leaders Program, is now a gastroenterologist and researcher at the Fred Hutch Cancer Center in Seattle. In an interview, he talked about his dual role as a physician and scientist, and how those two interests are guiding his research in precancerous conditions of the colon.

Cases like that of the young woman with colon cancer “really help drive the urgency of the work we do, and the research questions we ask, as we try to move the ball forward and help folks at earlier stages,” he said.

Fred Hutch Cancer Center

Q: Why did you choose GI?

When you think about what sorts of chronic diseases really impact your quality of life, gut health is one of the chief contributors among various aspects of health. And that really appealed to me — the ability to take someone who is essentially handicapped by a series of illnesses and symptoms that derive from the GI tract and enable them to return to the person they want to be, to be productive in the way that they want to be, and have a rewarding life.

As I thought about how I wanted to contribute to the future of medicine, one of the ways in which I’ve always thought that I would do that is through research. When I considered the fields that really appealed to me, both from that clinical standpoint and research standpoint, GI was one that really stood out. There has been a lot of exciting research going on in GI. My lab currently studies the microbiome, and I feel like this is an area in which we can contribute.
 

Q: What role does digestive health play in overall health?

Obviously, the direct answer is gut health is so critical in something like nutritional intake. Some GI symptoms, if your gut health has gone awry, can really be detrimental in terms of quality of life. But one less obvious role that digestive health plays is its long-term effects. We’re starting to appreciate that gut health, the gut microbiome, and gut immune education are probably long-term players. Some experiences in early life might shape our immunity in ways that have consequences for us much later in life. Whether we get early life antibiotics, for example, may potentially contribute to colorectal cancer down the line. Thinking about the long-term players is more challenging, but it’s also an appealing opportunity as we think about how we can shape medicine moving forward.

Q: What practice challenges have you faced in your career?

First, being a physician-scientist. It’s challenging to be either a physician alone or to be a researcher alone. And trying to do both includes the challenges of both individual worlds. It just takes more time to get all the prerequisite training. And second, there are just challenges with getting the opportunities to contribute in the ways that you want — to get the research funding, to get the papers out, things like that.

Q: Tell me about the work you’ve been doing in your lab to develop microbiome-based strategies for preventing and treating cancer.

The microbiome presents several opportunities when it comes to cancer prevention. One is identifying markers of cancer risk, or of general good health down the line. Some of those biomarkers could — potentially — feed directly into personalized risk assessment and maybe even inform a future screening strategy. The second opportunity the microbiome presents is if we identify a microbe that influences your cancer risk, can we then understand and exploit, or utilize, that mechanism to mitigate cancer risk in the future? Our lab has done work looking at subspecies levels of microbes that track with health or cancer. We’ve done some work to identify what these subspecies groupings are and have identified some links to certain precancerous changes in the colon. We think that there’s an opportunity here for future interventions.

Q: Have you published other papers?

We recently published another paper describing how some microbes can interact with a tumor suppressor gene and are influenced in a sex-biased manner to drive tumorigenesis in a mouse model. We think, based on what we’re seeing in human data, that there may be some relationships and we’re exploring that now as well. 

Q: What is your vision for the future in GI, and in your career?

The vision that I have is to create clinical tools that can expand our reach and our effectiveness and cancer prevention. I think that there are opportunities for leveraging microbiome research to accomplish this. And one outcome I could imagine is leveraging some of these insights to expand noninvasive screening at even earlier ages than we do now. I mean, we just dialed back the recommended age for colonoscopy for average risk individuals to 45. But I could envision a future in which noninvasive screening starts earlier, in which the first stool-based tests that we deploy to assess personalized risk are used in the pediatric clinic.

Lightning Round

Texting or talking?

Talking

Favorite city in the United States besides the one you live in?

St. Louis

Cat or dog person?

Both

If you weren’t a GI, what would you be?

Musician

Best place you went on vacation?

Borneo

Favorite sport?

Soccer

Favorite ice cream?

Cashew-based salted caramel

What song do you have to sing along with when you hear it?

Sweet Child of Mine

Favorite movie or TV show?

25th Hour or Shawshank Redemption

Optimist or Pessimist?

Optimist

A breakthrough in medical testing now allows for colorectal cancer screening with just a simple blood test, promising a more accessible and less invasive way to catch the disease early. 

The FDA on July 29 approved the test, called Shield, which can accurately detect tumors in the colon or rectum about 87% of the time when the cancer is in treatable early stages. The approval was announced July 29 by the test’s maker, Guardant Health, and comes just months after promising clinical trial results were published in The New England Journal of Medicine.

Colorectal cancer is among the most common types of cancer diagnosed in the United States each year, along with being one of the leading causes of cancer deaths. The condition is treatable in early stages, but about 1 in 3 people don’t stay up to date on regular screenings, which should begin at age 45.

The simplicity of a blood test could make it more likely for people to be screened for and, ultimately, survive the disease. Other primary screening options include feces-based tests or colonoscopy. The 5-year survival rate for colorectal cancer is 64%.

While highly accurate at detecting DNA shed by tumors during treatable stages of colorectal cancer, the Shield test was not as effective at detecting precancerous areas of tissue, which are typically removed after being detected.

In its news release, Guardant Health officials said they anticipate the test to be covered under Medicare. The out-of-pocket cost for people whose insurance does not cover the test has not yet been announced. The test is expected to be available by next week, The New York Times reported.

If someone’s Shield test comes back positive, the person would then get more tests to confirm the result. Shield was shown in trials to have a 10% false positive rate.

“I was in for a routine physical, and my doctor asked when I had my last colonoscopy,” said John Gormly, a 77-year-old business executive in Newport Beach, California, according to a Guardant Health news release. “I said it’s been a long time, so he offered to give me the Shield blood test. A few days later, the result came back positive, so he referred me for a colonoscopy. It turned out I had stage II colon cancer. The tumor was removed, and I recovered very quickly. Thank God I had taken that blood test.”
 

A version of this article appeared on WebMD.com.

A breakthrough in medical testing now allows for colorectal cancer screening with just a simple blood test, promising a more accessible and less invasive way to catch the disease early. 

The FDA on July 29 approved the test, called Shield, which can accurately detect tumors in the colon or rectum about 87% of the time when the cancer is in treatable early stages. The approval was announced July 29 by the test’s maker, Guardant Health, and comes just months after promising clinical trial results were published in The New England Journal of Medicine.

Colorectal cancer is among the most common types of cancer diagnosed in the United States each year, along with being one of the leading causes of cancer deaths. The condition is treatable in early stages, but about 1 in 3 people don’t stay up to date on regular screenings, which should begin at age 45.

The simplicity of a blood test could make it more likely for people to be screened for and, ultimately, survive the disease. Other primary screening options include feces-based tests or colonoscopy. The 5-year survival rate for colorectal cancer is 64%.

While highly accurate at detecting DNA shed by tumors during treatable stages of colorectal cancer, the Shield test was not as effective at detecting precancerous areas of tissue, which are typically removed after being detected.

In its news release, Guardant Health officials said they anticipate the test to be covered under Medicare. The out-of-pocket cost for people whose insurance does not cover the test has not yet been announced. The test is expected to be available by next week, The New York Times reported.

If someone’s Shield test comes back positive, the person would then get more tests to confirm the result. Shield was shown in trials to have a 10% false positive rate.

“I was in for a routine physical, and my doctor asked when I had my last colonoscopy,” said John Gormly, a 77-year-old business executive in Newport Beach, California, according to a Guardant Health news release. “I said it’s been a long time, so he offered to give me the Shield blood test. A few days later, the result came back positive, so he referred me for a colonoscopy. It turned out I had stage II colon cancer. The tumor was removed, and I recovered very quickly. Thank God I had taken that blood test.”
 

A version of this article appeared on WebMD.com.

A breakthrough in medical testing now allows for colorectal cancer screening with just a simple blood test, promising a more accessible and less invasive way to catch the disease early. 

The FDA on July 29 approved the test, called Shield, which can accurately detect tumors in the colon or rectum about 87% of the time when the cancer is in treatable early stages. The approval was announced July 29 by the test’s maker, Guardant Health, and comes just months after promising clinical trial results were published in The New England Journal of Medicine.

Colorectal cancer is among the most common types of cancer diagnosed in the United States each year, along with being one of the leading causes of cancer deaths. The condition is treatable in early stages, but about 1 in 3 people don’t stay up to date on regular screenings, which should begin at age 45.

The simplicity of a blood test could make it more likely for people to be screened for and, ultimately, survive the disease. Other primary screening options include feces-based tests or colonoscopy. The 5-year survival rate for colorectal cancer is 64%.

While highly accurate at detecting DNA shed by tumors during treatable stages of colorectal cancer, the Shield test was not as effective at detecting precancerous areas of tissue, which are typically removed after being detected.

In its news release, Guardant Health officials said they anticipate the test to be covered under Medicare. The out-of-pocket cost for people whose insurance does not cover the test has not yet been announced. The test is expected to be available by next week, The New York Times reported.

If someone’s Shield test comes back positive, the person would then get more tests to confirm the result. Shield was shown in trials to have a 10% false positive rate.

“I was in for a routine physical, and my doctor asked when I had my last colonoscopy,” said John Gormly, a 77-year-old business executive in Newport Beach, California, according to a Guardant Health news release. “I said it’s been a long time, so he offered to give me the Shield blood test. A few days later, the result came back positive, so he referred me for a colonoscopy. It turned out I had stage II colon cancer. The tumor was removed, and I recovered very quickly. Thank God I had taken that blood test.”
 

A version of this article appeared on WebMD.com.

WASHINGTON — A risk-stratified upper age limit may be beneficial for colorectal cancer (CRC) screening among patients who are ages 75 and older, according to a study presented at the annual Digestive Disease Week^® (DDW).

In particular, interval CRC risk can vary substantially based on the fecal hemoglobin (f-Hb) concentration in the patient’s last fecal immunochemical test (FIT), as well as the number of prior screening rounds.

“Less is known about what happens after the upper age limit has been reached and individuals are not invited to participate in more screening rounds. This is important as life expectancy is increasing, and it is increasingly important to consider the most efficient way of screening the elderly,” said lead author Brenda van Stigt, a PhD candidate focused on cancer screening at Erasmus University Medical Center in Rotterdam, the Netherlands.

In the Netherlands, adults between ages 55 and 75 are invited to participate in stool-based CRC screening every 2 years. Based on a fecal immunochemical testing (FIT) threshold of 47 μg Hb/g, those who test positive are referred to colonoscopy, and those who test negative are invited to participate again after a 2-year period.

FIT can play a major role in risk stratification, Ms. van Stigt noted, along with other factors that influence CRC risk, such as age, sex, and CRC screening history. Although this is documented for ages 55-75, she and colleagues wanted to know more about what happens after age 75.

Ms. Van Stigt and colleagues conducted a population-based study by analyzing Dutch national cancer registry data and FIT results around the final screening at age 75, looking at those who were diagnosed with CRC within 24 months of their last negative FIT. The researchers assessed interval CRC risk and cancer stage, accounting for sex, last f-Hb concentration, and the number of screening rounds.

Among 305,761 people with a complete 24-month follow-up after a negative FIT, 661 patients were diagnosed with interval CRC, indicating an overall interval CRC risk of 21.6 per 10,000 individuals with a negative FIT. There were no significant differences by sex.

However, there were differences by screening rounds, with those who had participated in three or four screening rounds having a lower risk than those who participated only once (HR, .49).

In addition, those with detectable f-Hb (>0 μg Hb/g) in their last screening round had a much higher interval CRC risk (HR, 4.87), at 65.8 per 10,000 negative FITs, compared with 13.8 per 10,000 among those without detectable f-Hb. Interval CRC risk also increased over time for those with detectable f-Hb.

About 15% of the total population had detectable f-Hb, whereas 46% of those with interval CRC had detectable f-Hb, Ms. van Stigt said, meaning that nearly half of patients who were diagnosed with interval CRC already had detectable f-Hb in their prior FIT.

In a survival analysis, there was no association between interval CRC risk and sex. However, those who participated in three or four screening rounds were half as likely to be diagnosed than those who participated once or twice, and those with detectable f-Hb were five times as likely to be diagnosed.

For late-stage CRC, there was no association with sex or the number of screening rounds. Detectable f-Hb was associated with not only a higher risk of interval CRC but also a late-stage diagnosis.

“These findings indicate that one uniform age to stop screening is suboptimal,” Ms. van Stigt said. “Personalized screening strategies should, therefore, also ideally incorporate a risk-stratified age to stop screening.”

The US Preventive Services Task Force recommends that clinicians personalize screening for ages 76-85, accounting for overall health, prior screening history, and patient preferences.

“But we have no clear guidance on how to quantify or weigh these factors. This interesting study highlights how one of these factors (prior screening history) and fecal hemoglobin level (an emerging factor) are powerful stratifiers of subsequent colorectal cancer risk,” said Sameer D. Saini, MD, AGAF, director and research investigator at the VA Ann Arbor Healthcare System’s Center for Clinical Management Research. Dr. Saini wasn’t involved with the study.

At the clinical level, Dr. Saini said, sophisticated modeling is needed to understand the interaction with competing risks and identify the optimal screening strategies for patients at varying levels of cancer risk and life expectancy. Models could also help to quantify the population benefits and cost-effectiveness of personalized screening.

“Finally, it is important to note that, in many health systems, access to quantitative FIT may be limited,” he said. “These data may be less informative if colonoscopy is the primary mode of screening.”

Ms. van Stigt and Dr. Saini reported no relevant disclosures.

WASHINGTON — A risk-stratified upper age limit may be beneficial for colorectal cancer (CRC) screening among patients who are ages 75 and older, according to a study presented at the annual Digestive Disease Week^® (DDW).

In particular, interval CRC risk can vary substantially based on the fecal hemoglobin (f-Hb) concentration in the patient’s last fecal immunochemical test (FIT), as well as the number of prior screening rounds.

“Less is known about what happens after the upper age limit has been reached and individuals are not invited to participate in more screening rounds. This is important as life expectancy is increasing, and it is increasingly important to consider the most efficient way of screening the elderly,” said lead author Brenda van Stigt, a PhD candidate focused on cancer screening at Erasmus University Medical Center in Rotterdam, the Netherlands.

In the Netherlands, adults between ages 55 and 75 are invited to participate in stool-based CRC screening every 2 years. Based on a fecal immunochemical testing (FIT) threshold of 47 μg Hb/g, those who test positive are referred to colonoscopy, and those who test negative are invited to participate again after a 2-year period.

FIT can play a major role in risk stratification, Ms. van Stigt noted, along with other factors that influence CRC risk, such as age, sex, and CRC screening history. Although this is documented for ages 55-75, she and colleagues wanted to know more about what happens after age 75.

Ms. Van Stigt and colleagues conducted a population-based study by analyzing Dutch national cancer registry data and FIT results around the final screening at age 75, looking at those who were diagnosed with CRC within 24 months of their last negative FIT. The researchers assessed interval CRC risk and cancer stage, accounting for sex, last f-Hb concentration, and the number of screening rounds.

Among 305,761 people with a complete 24-month follow-up after a negative FIT, 661 patients were diagnosed with interval CRC, indicating an overall interval CRC risk of 21.6 per 10,000 individuals with a negative FIT. There were no significant differences by sex.

However, there were differences by screening rounds, with those who had participated in three or four screening rounds having a lower risk than those who participated only once (HR, .49).

In addition, those with detectable f-Hb (>0 μg Hb/g) in their last screening round had a much higher interval CRC risk (HR, 4.87), at 65.8 per 10,000 negative FITs, compared with 13.8 per 10,000 among those without detectable f-Hb. Interval CRC risk also increased over time for those with detectable f-Hb.

About 15% of the total population had detectable f-Hb, whereas 46% of those with interval CRC had detectable f-Hb, Ms. van Stigt said, meaning that nearly half of patients who were diagnosed with interval CRC already had detectable f-Hb in their prior FIT.

In a survival analysis, there was no association between interval CRC risk and sex. However, those who participated in three or four screening rounds were half as likely to be diagnosed than those who participated once or twice, and those with detectable f-Hb were five times as likely to be diagnosed.

For late-stage CRC, there was no association with sex or the number of screening rounds. Detectable f-Hb was associated with not only a higher risk of interval CRC but also a late-stage diagnosis.

“These findings indicate that one uniform age to stop screening is suboptimal,” Ms. van Stigt said. “Personalized screening strategies should, therefore, also ideally incorporate a risk-stratified age to stop screening.”

The US Preventive Services Task Force recommends that clinicians personalize screening for ages 76-85, accounting for overall health, prior screening history, and patient preferences.

“But we have no clear guidance on how to quantify or weigh these factors. This interesting study highlights how one of these factors (prior screening history) and fecal hemoglobin level (an emerging factor) are powerful stratifiers of subsequent colorectal cancer risk,” said Sameer D. Saini, MD, AGAF, director and research investigator at the VA Ann Arbor Healthcare System’s Center for Clinical Management Research. Dr. Saini wasn’t involved with the study.

At the clinical level, Dr. Saini said, sophisticated modeling is needed to understand the interaction with competing risks and identify the optimal screening strategies for patients at varying levels of cancer risk and life expectancy. Models could also help to quantify the population benefits and cost-effectiveness of personalized screening.

“Finally, it is important to note that, in many health systems, access to quantitative FIT may be limited,” he said. “These data may be less informative if colonoscopy is the primary mode of screening.”

Ms. van Stigt and Dr. Saini reported no relevant disclosures.

WASHINGTON — A risk-stratified upper age limit may be beneficial for colorectal cancer (CRC) screening among patients who are ages 75 and older, according to a study presented at the annual Digestive Disease Week^® (DDW).

In particular, interval CRC risk can vary substantially based on the fecal hemoglobin (f-Hb) concentration in the patient’s last fecal immunochemical test (FIT), as well as the number of prior screening rounds.

“Less is known about what happens after the upper age limit has been reached and individuals are not invited to participate in more screening rounds. This is important as life expectancy is increasing, and it is increasingly important to consider the most efficient way of screening the elderly,” said lead author Brenda van Stigt, a PhD candidate focused on cancer screening at Erasmus University Medical Center in Rotterdam, the Netherlands.

In the Netherlands, adults between ages 55 and 75 are invited to participate in stool-based CRC screening every 2 years. Based on a fecal immunochemical testing (FIT) threshold of 47 μg Hb/g, those who test positive are referred to colonoscopy, and those who test negative are invited to participate again after a 2-year period.

FIT can play a major role in risk stratification, Ms. van Stigt noted, along with other factors that influence CRC risk, such as age, sex, and CRC screening history. Although this is documented for ages 55-75, she and colleagues wanted to know more about what happens after age 75.

Ms. Van Stigt and colleagues conducted a population-based study by analyzing Dutch national cancer registry data and FIT results around the final screening at age 75, looking at those who were diagnosed with CRC within 24 months of their last negative FIT. The researchers assessed interval CRC risk and cancer stage, accounting for sex, last f-Hb concentration, and the number of screening rounds.

Among 305,761 people with a complete 24-month follow-up after a negative FIT, 661 patients were diagnosed with interval CRC, indicating an overall interval CRC risk of 21.6 per 10,000 individuals with a negative FIT. There were no significant differences by sex.

However, there were differences by screening rounds, with those who had participated in three or four screening rounds having a lower risk than those who participated only once (HR, .49).

In addition, those with detectable f-Hb (>0 μg Hb/g) in their last screening round had a much higher interval CRC risk (HR, 4.87), at 65.8 per 10,000 negative FITs, compared with 13.8 per 10,000 among those without detectable f-Hb. Interval CRC risk also increased over time for those with detectable f-Hb.

About 15% of the total population had detectable f-Hb, whereas 46% of those with interval CRC had detectable f-Hb, Ms. van Stigt said, meaning that nearly half of patients who were diagnosed with interval CRC already had detectable f-Hb in their prior FIT.

In a survival analysis, there was no association between interval CRC risk and sex. However, those who participated in three or four screening rounds were half as likely to be diagnosed than those who participated once or twice, and those with detectable f-Hb were five times as likely to be diagnosed.

For late-stage CRC, there was no association with sex or the number of screening rounds. Detectable f-Hb was associated with not only a higher risk of interval CRC but also a late-stage diagnosis.

“These findings indicate that one uniform age to stop screening is suboptimal,” Ms. van Stigt said. “Personalized screening strategies should, therefore, also ideally incorporate a risk-stratified age to stop screening.”

The US Preventive Services Task Force recommends that clinicians personalize screening for ages 76-85, accounting for overall health, prior screening history, and patient preferences.

“But we have no clear guidance on how to quantify or weigh these factors. This interesting study highlights how one of these factors (prior screening history) and fecal hemoglobin level (an emerging factor) are powerful stratifiers of subsequent colorectal cancer risk,” said Sameer D. Saini, MD, AGAF, director and research investigator at the VA Ann Arbor Healthcare System’s Center for Clinical Management Research. Dr. Saini wasn’t involved with the study.

At the clinical level, Dr. Saini said, sophisticated modeling is needed to understand the interaction with competing risks and identify the optimal screening strategies for patients at varying levels of cancer risk and life expectancy. Models could also help to quantify the population benefits and cost-effectiveness of personalized screening.

“Finally, it is important to note that, in many health systems, access to quantitative FIT may be limited,” he said. “These data may be less informative if colonoscopy is the primary mode of screening.”

Ms. van Stigt and Dr. Saini reported no relevant disclosures.

TOPLINE:

For patients with gastric cancer, extending regular follow-up beyond the typical 5 years after gastrectomy was associated with improved overall and post-recurrence survival rates, new data from a retrospective analysis showed.

METHODOLOGY:

• Currently, postgastrectomy cancer surveillance typically lasts 5 years, although some centers now monitor patients beyond this point.
• To investigate the potential benefit of extended surveillance, researchers used Korean National Health Insurance claims data to identify 40,468 patients with gastric cancer who were disease free 5 years after gastrectomy — 14,294 received extended regular follow-up visits and 26,174 did not.
• The extended regular follow-up group was defined as having endoscopy or abdominopelvic CT between 2 months and 2 years before diagnosis of late recurrence or gastric remnant cancer and having two or more examinations between 5.5 and 8.5 years after gastrectomy. Late recurrence was a recurrence diagnosed 5 years after gastrectomy.
• Researchers used Cox proportional hazards regression to evaluate the independent association between follow-up and overall and postrecurrence survival rates.

TAKEAWAY:

• Overall, 5 years postgastrectomy, the incidence of late recurrence or gastric remnant cancer was 7.8% — 4.0% between 5 and 10 years (1610 of 40,468 patients) and 9.4% after 10 years (1528 of 16,287 patients).
• Regular follow-up beyond 5 years was associated with a significant reduction in overall mortality — from 49.4% to 36.9% at 15 years (P < .001). Overall survival after late recurrence or gastric remnant cancer also improved significantly with extended regular follow-up, with the 5-year postrecurrence survival rate increasing from 32.7% to 71.1% (P < .001).
• The combination of endoscopy and abdominopelvic CT provided the highest 5-year postrecurrence survival rate (74.5%), compared with endoscopy alone (54.5%) or CT alone (47.1%).
• A time interval of more than 2 years between a previous endoscopy or abdominopelvic CT and diagnosis of late recurrence or gastric remnant cancer significantly decreased postrecurrence survival (hazard ratio [HR], 1.72 for endoscopy and HR, 1.48 for abdominopelvic CT).

IN PRACTICE:

“These findings suggest that extended regular follow-up after 5 years post gastrectomy should be implemented clinically and that current practice and value of follow-up protocols in postoperative care of patients with gastric cancer be reconsidered,” the authors concluded.

The authors of an accompanying commentary cautioned that, while the study “successfully establishes groundwork for extending surveillance of gastric cancer in high-risk populations, more work is needed to strategically identify those who would benefit most from extended surveillance.”
 

SOURCE:

The study, with first author Ju-Hee Lee, MD, PhD, Department of Surgery, Hanyang University College of Medicine, Seoul, South Korea, and accompanying commentary were published online on June 18 in JAMA Surgery.

LIMITATIONS:

Recurrent cancer and gastric remnant cancer could not be distinguished from each other because clinical records were not analyzed. The claims database lacked detailed clinical information on individual patients, including cancer stages, and a separate analysis of tumor markers could not be performed.

DISCLOSURES:

The study was funded by a grant from the Korean Gastric Cancer Association. The study authors and commentary authors reported no conflicts of interest.

A version of this article appeared on Medscape.com.

TOPLINE:

For patients with gastric cancer, extending regular follow-up beyond the typical 5 years after gastrectomy was associated with improved overall and post-recurrence survival rates, new data from a retrospective analysis showed.

METHODOLOGY:

• Currently, postgastrectomy cancer surveillance typically lasts 5 years, although some centers now monitor patients beyond this point.
• To investigate the potential benefit of extended surveillance, researchers used Korean National Health Insurance claims data to identify 40,468 patients with gastric cancer who were disease free 5 years after gastrectomy — 14,294 received extended regular follow-up visits and 26,174 did not.
• The extended regular follow-up group was defined as having endoscopy or abdominopelvic CT between 2 months and 2 years before diagnosis of late recurrence or gastric remnant cancer and having two or more examinations between 5.5 and 8.5 years after gastrectomy. Late recurrence was a recurrence diagnosed 5 years after gastrectomy.
• Researchers used Cox proportional hazards regression to evaluate the independent association between follow-up and overall and postrecurrence survival rates.

TAKEAWAY:

• Overall, 5 years postgastrectomy, the incidence of late recurrence or gastric remnant cancer was 7.8% — 4.0% between 5 and 10 years (1610 of 40,468 patients) and 9.4% after 10 years (1528 of 16,287 patients).
• Regular follow-up beyond 5 years was associated with a significant reduction in overall mortality — from 49.4% to 36.9% at 15 years (P < .001). Overall survival after late recurrence or gastric remnant cancer also improved significantly with extended regular follow-up, with the 5-year postrecurrence survival rate increasing from 32.7% to 71.1% (P < .001).
• The combination of endoscopy and abdominopelvic CT provided the highest 5-year postrecurrence survival rate (74.5%), compared with endoscopy alone (54.5%) or CT alone (47.1%).
• A time interval of more than 2 years between a previous endoscopy or abdominopelvic CT and diagnosis of late recurrence or gastric remnant cancer significantly decreased postrecurrence survival (hazard ratio [HR], 1.72 for endoscopy and HR, 1.48 for abdominopelvic CT).

IN PRACTICE:

“These findings suggest that extended regular follow-up after 5 years post gastrectomy should be implemented clinically and that current practice and value of follow-up protocols in postoperative care of patients with gastric cancer be reconsidered,” the authors concluded.

The authors of an accompanying commentary cautioned that, while the study “successfully establishes groundwork for extending surveillance of gastric cancer in high-risk populations, more work is needed to strategically identify those who would benefit most from extended surveillance.”
 

SOURCE:

The study, with first author Ju-Hee Lee, MD, PhD, Department of Surgery, Hanyang University College of Medicine, Seoul, South Korea, and accompanying commentary were published online on June 18 in JAMA Surgery.

LIMITATIONS:

Recurrent cancer and gastric remnant cancer could not be distinguished from each other because clinical records were not analyzed. The claims database lacked detailed clinical information on individual patients, including cancer stages, and a separate analysis of tumor markers could not be performed.

DISCLOSURES:

The study was funded by a grant from the Korean Gastric Cancer Association. The study authors and commentary authors reported no conflicts of interest.

A version of this article appeared on Medscape.com.

TOPLINE:

For patients with gastric cancer, extending regular follow-up beyond the typical 5 years after gastrectomy was associated with improved overall and post-recurrence survival rates, new data from a retrospective analysis showed.

METHODOLOGY:

• Currently, postgastrectomy cancer surveillance typically lasts 5 years, although some centers now monitor patients beyond this point.
• To investigate the potential benefit of extended surveillance, researchers used Korean National Health Insurance claims data to identify 40,468 patients with gastric cancer who were disease free 5 years after gastrectomy — 14,294 received extended regular follow-up visits and 26,174 did not.
• The extended regular follow-up group was defined as having endoscopy or abdominopelvic CT between 2 months and 2 years before diagnosis of late recurrence or gastric remnant cancer and having two or more examinations between 5.5 and 8.5 years after gastrectomy. Late recurrence was a recurrence diagnosed 5 years after gastrectomy.
• Researchers used Cox proportional hazards regression to evaluate the independent association between follow-up and overall and postrecurrence survival rates.

TAKEAWAY:

• Overall, 5 years postgastrectomy, the incidence of late recurrence or gastric remnant cancer was 7.8% — 4.0% between 5 and 10 years (1610 of 40,468 patients) and 9.4% after 10 years (1528 of 16,287 patients).
• Regular follow-up beyond 5 years was associated with a significant reduction in overall mortality — from 49.4% to 36.9% at 15 years (P < .001). Overall survival after late recurrence or gastric remnant cancer also improved significantly with extended regular follow-up, with the 5-year postrecurrence survival rate increasing from 32.7% to 71.1% (P < .001).
• The combination of endoscopy and abdominopelvic CT provided the highest 5-year postrecurrence survival rate (74.5%), compared with endoscopy alone (54.5%) or CT alone (47.1%).
• A time interval of more than 2 years between a previous endoscopy or abdominopelvic CT and diagnosis of late recurrence or gastric remnant cancer significantly decreased postrecurrence survival (hazard ratio [HR], 1.72 for endoscopy and HR, 1.48 for abdominopelvic CT).

IN PRACTICE:

“These findings suggest that extended regular follow-up after 5 years post gastrectomy should be implemented clinically and that current practice and value of follow-up protocols in postoperative care of patients with gastric cancer be reconsidered,” the authors concluded.

The authors of an accompanying commentary cautioned that, while the study “successfully establishes groundwork for extending surveillance of gastric cancer in high-risk populations, more work is needed to strategically identify those who would benefit most from extended surveillance.”
 

SOURCE:

The study, with first author Ju-Hee Lee, MD, PhD, Department of Surgery, Hanyang University College of Medicine, Seoul, South Korea, and accompanying commentary were published online on June 18 in JAMA Surgery.

LIMITATIONS:

Recurrent cancer and gastric remnant cancer could not be distinguished from each other because clinical records were not analyzed. The claims database lacked detailed clinical information on individual patients, including cancer stages, and a separate analysis of tumor markers could not be performed.

DISCLOSURES:

The study was funded by a grant from the Korean Gastric Cancer Association. The study authors and commentary authors reported no conflicts of interest.

A version of this article appeared on Medscape.com.