Hematology

FORT LAUDERDALE, Fla. – A study of sickle cell patients at a clinic in the Bronx found that upwards of 75% of them get a prescription for hydroxyurea to improve hemoglobin levels, but that one-third have discontinued use for various reasons, according to results reported at the 13^th annual Foundation for Sickle Cell Disease Research symposium here.

“The results identify variability in reported side effects and reasons for discontinuation, and highlight the importance of clear communication between providers and patients to discuss the benefits and challenges of hydroxyurea,” said Caterina Minniti, MD, professor of clinical medicine and pediatrics at Einstein College of Medicine and director of the Sickle Cell Center for Adults at Montefiore Hospital, Bronx, N.Y. The study analyzed self-reporting surveys completed by 224 adult outpatients in the Montefiore sickle cell clinic, and then verified the data in the electronic medical record, Dr. Minniti said. She noted, “Our population is unique in the Bronx in that we have a high percentage of Hispanic patients.” They comprised 24.1% of the study population.

“We found that 77.2% of the patients have ever been prescribed hydroxyurea,” she said. “That was really great.” Also, 91% of those with severe genotypes of SCD had been prescribed the drug; 68% of them were still taking hydroxyurea at the time of the survey, she said. Among patients with the mild genotype, 42.1% had been prescribed hydroxyurea and half were still on it when they completed their surveys.

When the survey evaluated how long patients had been taking the drug, she said, “That’s where I start to get concerned.” About half – 48.6% – had taken the drug for one to five years, “which is a very short period of time,” Dr. Minniti said. Another 15% were on hydroxyurea for less than a year, 23% for 5 to 10 years and 19% for 10 years or more.

The study drilled down into reasons why patients discontinued the drug. Side effects were cited by 24.6% (n=15). They include fatigue, hair loss, and GI upset. Other reasons include perceived ineffectiveness (16.4%, n=10); physician direction (14.8%, n=9), and reproductive health and ulcer formation (each at 8.2%, n=5).

“Many patients perceive ineffectiveness of hydroxyurea in the short term, but the benefits of hydoxyurea stem from chronic use over the long term,” Dr. Minniti said. She noted that some patients discontinued the drug for legitimate medical indications, “such as pregnancy and breast feeding, but were not restarted afterward.”

Dr. Minniti disclosed relationships with Novartis, Global Blood Therapeutics, Teutona, Bluebird Bio, GBT and Bayer.

SOURCE: Minniti C, et al. Abstract no. JSCDH-D-19-00058. Foundation for Sickle Cell Disease Research Symposium; Fort Lauderdale, Fla.; June 9, 2019.

FORT LAUDERDALE, Fla. – A study of sickle cell patients at a clinic in the Bronx found that upwards of 75% of them get a prescription for hydroxyurea to improve hemoglobin levels, but that one-third have discontinued use for various reasons, according to results reported at the 13^th annual Foundation for Sickle Cell Disease Research symposium here.

“The results identify variability in reported side effects and reasons for discontinuation, and highlight the importance of clear communication between providers and patients to discuss the benefits and challenges of hydroxyurea,” said Caterina Minniti, MD, professor of clinical medicine and pediatrics at Einstein College of Medicine and director of the Sickle Cell Center for Adults at Montefiore Hospital, Bronx, N.Y. The study analyzed self-reporting surveys completed by 224 adult outpatients in the Montefiore sickle cell clinic, and then verified the data in the electronic medical record, Dr. Minniti said. She noted, “Our population is unique in the Bronx in that we have a high percentage of Hispanic patients.” They comprised 24.1% of the study population.

“We found that 77.2% of the patients have ever been prescribed hydroxyurea,” she said. “That was really great.” Also, 91% of those with severe genotypes of SCD had been prescribed the drug; 68% of them were still taking hydroxyurea at the time of the survey, she said. Among patients with the mild genotype, 42.1% had been prescribed hydroxyurea and half were still on it when they completed their surveys.

When the survey evaluated how long patients had been taking the drug, she said, “That’s where I start to get concerned.” About half – 48.6% – had taken the drug for one to five years, “which is a very short period of time,” Dr. Minniti said. Another 15% were on hydroxyurea for less than a year, 23% for 5 to 10 years and 19% for 10 years or more.

The study drilled down into reasons why patients discontinued the drug. Side effects were cited by 24.6% (n=15). They include fatigue, hair loss, and GI upset. Other reasons include perceived ineffectiveness (16.4%, n=10); physician direction (14.8%, n=9), and reproductive health and ulcer formation (each at 8.2%, n=5).

“Many patients perceive ineffectiveness of hydroxyurea in the short term, but the benefits of hydoxyurea stem from chronic use over the long term,” Dr. Minniti said. She noted that some patients discontinued the drug for legitimate medical indications, “such as pregnancy and breast feeding, but were not restarted afterward.”

Dr. Minniti disclosed relationships with Novartis, Global Blood Therapeutics, Teutona, Bluebird Bio, GBT and Bayer.

SOURCE: Minniti C, et al. Abstract no. JSCDH-D-19-00058. Foundation for Sickle Cell Disease Research Symposium; Fort Lauderdale, Fla.; June 9, 2019.

FORT LAUDERDALE, Fla. – A study of sickle cell patients at a clinic in the Bronx found that upwards of 75% of them get a prescription for hydroxyurea to improve hemoglobin levels, but that one-third have discontinued use for various reasons, according to results reported at the 13^th annual Foundation for Sickle Cell Disease Research symposium here.

“The results identify variability in reported side effects and reasons for discontinuation, and highlight the importance of clear communication between providers and patients to discuss the benefits and challenges of hydroxyurea,” said Caterina Minniti, MD, professor of clinical medicine and pediatrics at Einstein College of Medicine and director of the Sickle Cell Center for Adults at Montefiore Hospital, Bronx, N.Y. The study analyzed self-reporting surveys completed by 224 adult outpatients in the Montefiore sickle cell clinic, and then verified the data in the electronic medical record, Dr. Minniti said. She noted, “Our population is unique in the Bronx in that we have a high percentage of Hispanic patients.” They comprised 24.1% of the study population.

“We found that 77.2% of the patients have ever been prescribed hydroxyurea,” she said. “That was really great.” Also, 91% of those with severe genotypes of SCD had been prescribed the drug; 68% of them were still taking hydroxyurea at the time of the survey, she said. Among patients with the mild genotype, 42.1% had been prescribed hydroxyurea and half were still on it when they completed their surveys.

When the survey evaluated how long patients had been taking the drug, she said, “That’s where I start to get concerned.” About half – 48.6% – had taken the drug for one to five years, “which is a very short period of time,” Dr. Minniti said. Another 15% were on hydroxyurea for less than a year, 23% for 5 to 10 years and 19% for 10 years or more.

The study drilled down into reasons why patients discontinued the drug. Side effects were cited by 24.6% (n=15). They include fatigue, hair loss, and GI upset. Other reasons include perceived ineffectiveness (16.4%, n=10); physician direction (14.8%, n=9), and reproductive health and ulcer formation (each at 8.2%, n=5).

“Many patients perceive ineffectiveness of hydroxyurea in the short term, but the benefits of hydoxyurea stem from chronic use over the long term,” Dr. Minniti said. She noted that some patients discontinued the drug for legitimate medical indications, “such as pregnancy and breast feeding, but were not restarted afterward.”

Dr. Minniti disclosed relationships with Novartis, Global Blood Therapeutics, Teutona, Bluebird Bio, GBT and Bayer.

SOURCE: Minniti C, et al. Abstract no. JSCDH-D-19-00058. Foundation for Sickle Cell Disease Research Symposium; Fort Lauderdale, Fla.; June 9, 2019.

FORT LAUDERDALE, FLA. – Hip joint pain and deterioration can be a painful and disabling outcome for patients with sickle cell disease, but femoral head core decompression with the addition of bone marrow aspirate concentrate decreases their pain and may help avoid or delay hip replacement, according to results of a pilot study presented at the annual meeting of the Foundation for Sickle Cell Disease Research.

Eric Fornari, MD, of the Children’s Hospital at Montefiore in Bronx, N.Y., reported on results of core decompression (CD) in 35 hips of 26 sickle cell patients; 17 underwent CD only and 18 had CD with injection of bone marrow aspirate concentrate (CD+BMAC). The average patient age was 24.3 years, with a range from 9.7-50.7 years.

“Compared to patients treated with CD alone, patients treated with CD+BMAC complained of significantly less pain and had significant improvement in their functional scores and patient-related outcomes at short-term follow-up,” Dr. Fornari said.

Among the CD+BMAC patients, pain scores declined two points on average, from 6 preoperatively to 4 postoperatively, he said. This was clinically significant, compared with the CD-only group, Dr. Fornari said.

Patients in the CD+BMAC group also reported consistently superior hip outcome and modified Harris hip scores. With either treatment, more than 90% of patients were pain-free and walked independently at their most recent follow-up, he said.

The objective of CD is to relieve pressure within the head of the femur, stimulate vascularity and target the avascular necrosis (AVN) lesion within the head that is visible on imaging. To get the bone marrow aspirate concentrate, Dr. Fornari extracts 120 cc of bone marrow from the iliac crest, then concentrates it to 12 cc. The same instrument is used to tap into the femoral head and inject the bone marrow aspirate concentrate. The study looked at clinical and radiographic outcomes of treated patients.

Average follow-up for the entire study population was 3.6 years, but that varied widely between the two groups (CD-only at almost 6 years, CD+BMAC at 1.4 years) because CD+BMAC has only been done for the last 3 years, Dr. Fornari said.

Progression to total hip arthroplasty (THA) was similar between both groups: 5 of 17 patients (29%) for CD-only vs. 4 of 18 patients (22%) for CD+BMAC (P = .711).

“When you look at progression, there were a number of hips that got CD or CD+BMAC and were better postoperatively; they went from a Ficat score of stage II to a stage I, or stage III to stage II,” he said.

X-rays were not always a reliable marker of outcome after either CD procedure, Dr. Fornari noted. “I’ve seen patients who’ve had terrible looking X-rays who have no pain, and patients who have totally normal X-rays that are completely debilitated,” he said. “We have to start asking ourselves, ‘What is the marker of success?’ because when we do this patients are feeling better.”

Multivariate analysis was used to identify factors predictive of progression to THA after the procedure, Dr. Fornari said. “Age of diagnosis, age of surgery, female gender, and lower hydroxyurea dose at surgery were predictive of advancing disease, whereas a higher dose of hydroxyurea was predictive against advancement,” he said.

The average age of patients who had no THA after either procedure was 21 years, compared with 33.9 years for those who had THA (P = .003). Average hydroxyurea dose at surgery was 24.7 mg/kg in the no-THA group vs. 12.5 mg/kg in those who had THA (P = .005).

Notably, there were no readmissions, fractures, deep vein thromboses, pulmonary embolisms or infarctions after CD, Dr. Fornari said. Transfusions were required in two CD-only and three CD+BMAC patients. Hospitalization rates for vaso-occlusive crisis were similar between groups (P = .103).

Dr. Fornari said the challenge is to identify suitable patients for these procedures. “These are complicated patients and you don’t want to put them through the process of having surgery, putting them on crutches and restricted weight bearing, if they’re not going to get better,” he said. “This procedure done minimally invasively is not the end all and be all, but we have to figure out who are the right patients for it. Patient selection is key.”

Finding those patients starts with a rigorous history and physical exam, he said. Physicians should have a “low threshold” for MRI in these patients because that will reveal findings, such as pre-collapse disease and characteristic of AVN lesions, that may appear normal on X-ray. Patient education is also important. “To think that an injection into the top of the hip is going to solve all their problems is a little naive, so you have to have an honest conversation with the patient,” he said.

Dr. Fornari reported having no financial disclosures.

SOURCE: Fornari ED et al. FSCDR 2019, Abstract JSCDH-D-19-00004.

FORT LAUDERDALE, FLA. – Hip joint pain and deterioration can be a painful and disabling outcome for patients with sickle cell disease, but femoral head core decompression with the addition of bone marrow aspirate concentrate decreases their pain and may help avoid or delay hip replacement, according to results of a pilot study presented at the annual meeting of the Foundation for Sickle Cell Disease Research.

Eric Fornari, MD, of the Children’s Hospital at Montefiore in Bronx, N.Y., reported on results of core decompression (CD) in 35 hips of 26 sickle cell patients; 17 underwent CD only and 18 had CD with injection of bone marrow aspirate concentrate (CD+BMAC). The average patient age was 24.3 years, with a range from 9.7-50.7 years.

“Compared to patients treated with CD alone, patients treated with CD+BMAC complained of significantly less pain and had significant improvement in their functional scores and patient-related outcomes at short-term follow-up,” Dr. Fornari said.

Among the CD+BMAC patients, pain scores declined two points on average, from 6 preoperatively to 4 postoperatively, he said. This was clinically significant, compared with the CD-only group, Dr. Fornari said.

Patients in the CD+BMAC group also reported consistently superior hip outcome and modified Harris hip scores. With either treatment, more than 90% of patients were pain-free and walked independently at their most recent follow-up, he said.

The objective of CD is to relieve pressure within the head of the femur, stimulate vascularity and target the avascular necrosis (AVN) lesion within the head that is visible on imaging. To get the bone marrow aspirate concentrate, Dr. Fornari extracts 120 cc of bone marrow from the iliac crest, then concentrates it to 12 cc. The same instrument is used to tap into the femoral head and inject the bone marrow aspirate concentrate. The study looked at clinical and radiographic outcomes of treated patients.

Average follow-up for the entire study population was 3.6 years, but that varied widely between the two groups (CD-only at almost 6 years, CD+BMAC at 1.4 years) because CD+BMAC has only been done for the last 3 years, Dr. Fornari said.

Progression to total hip arthroplasty (THA) was similar between both groups: 5 of 17 patients (29%) for CD-only vs. 4 of 18 patients (22%) for CD+BMAC (P = .711).

“When you look at progression, there were a number of hips that got CD or CD+BMAC and were better postoperatively; they went from a Ficat score of stage II to a stage I, or stage III to stage II,” he said.

X-rays were not always a reliable marker of outcome after either CD procedure, Dr. Fornari noted. “I’ve seen patients who’ve had terrible looking X-rays who have no pain, and patients who have totally normal X-rays that are completely debilitated,” he said. “We have to start asking ourselves, ‘What is the marker of success?’ because when we do this patients are feeling better.”

Multivariate analysis was used to identify factors predictive of progression to THA after the procedure, Dr. Fornari said. “Age of diagnosis, age of surgery, female gender, and lower hydroxyurea dose at surgery were predictive of advancing disease, whereas a higher dose of hydroxyurea was predictive against advancement,” he said.

The average age of patients who had no THA after either procedure was 21 years, compared with 33.9 years for those who had THA (P = .003). Average hydroxyurea dose at surgery was 24.7 mg/kg in the no-THA group vs. 12.5 mg/kg in those who had THA (P = .005).

Notably, there were no readmissions, fractures, deep vein thromboses, pulmonary embolisms or infarctions after CD, Dr. Fornari said. Transfusions were required in two CD-only and three CD+BMAC patients. Hospitalization rates for vaso-occlusive crisis were similar between groups (P = .103).

Dr. Fornari said the challenge is to identify suitable patients for these procedures. “These are complicated patients and you don’t want to put them through the process of having surgery, putting them on crutches and restricted weight bearing, if they’re not going to get better,” he said. “This procedure done minimally invasively is not the end all and be all, but we have to figure out who are the right patients for it. Patient selection is key.”

Finding those patients starts with a rigorous history and physical exam, he said. Physicians should have a “low threshold” for MRI in these patients because that will reveal findings, such as pre-collapse disease and characteristic of AVN lesions, that may appear normal on X-ray. Patient education is also important. “To think that an injection into the top of the hip is going to solve all their problems is a little naive, so you have to have an honest conversation with the patient,” he said.

Dr. Fornari reported having no financial disclosures.

SOURCE: Fornari ED et al. FSCDR 2019, Abstract JSCDH-D-19-00004.

FORT LAUDERDALE, FLA. – Hip joint pain and deterioration can be a painful and disabling outcome for patients with sickle cell disease, but femoral head core decompression with the addition of bone marrow aspirate concentrate decreases their pain and may help avoid or delay hip replacement, according to results of a pilot study presented at the annual meeting of the Foundation for Sickle Cell Disease Research.

Eric Fornari, MD, of the Children’s Hospital at Montefiore in Bronx, N.Y., reported on results of core decompression (CD) in 35 hips of 26 sickle cell patients; 17 underwent CD only and 18 had CD with injection of bone marrow aspirate concentrate (CD+BMAC). The average patient age was 24.3 years, with a range from 9.7-50.7 years.

“Compared to patients treated with CD alone, patients treated with CD+BMAC complained of significantly less pain and had significant improvement in their functional scores and patient-related outcomes at short-term follow-up,” Dr. Fornari said.

Among the CD+BMAC patients, pain scores declined two points on average, from 6 preoperatively to 4 postoperatively, he said. This was clinically significant, compared with the CD-only group, Dr. Fornari said.

Patients in the CD+BMAC group also reported consistently superior hip outcome and modified Harris hip scores. With either treatment, more than 90% of patients were pain-free and walked independently at their most recent follow-up, he said.

The objective of CD is to relieve pressure within the head of the femur, stimulate vascularity and target the avascular necrosis (AVN) lesion within the head that is visible on imaging. To get the bone marrow aspirate concentrate, Dr. Fornari extracts 120 cc of bone marrow from the iliac crest, then concentrates it to 12 cc. The same instrument is used to tap into the femoral head and inject the bone marrow aspirate concentrate. The study looked at clinical and radiographic outcomes of treated patients.

Average follow-up for the entire study population was 3.6 years, but that varied widely between the two groups (CD-only at almost 6 years, CD+BMAC at 1.4 years) because CD+BMAC has only been done for the last 3 years, Dr. Fornari said.

Progression to total hip arthroplasty (THA) was similar between both groups: 5 of 17 patients (29%) for CD-only vs. 4 of 18 patients (22%) for CD+BMAC (P = .711).

“When you look at progression, there were a number of hips that got CD or CD+BMAC and were better postoperatively; they went from a Ficat score of stage II to a stage I, or stage III to stage II,” he said.

X-rays were not always a reliable marker of outcome after either CD procedure, Dr. Fornari noted. “I’ve seen patients who’ve had terrible looking X-rays who have no pain, and patients who have totally normal X-rays that are completely debilitated,” he said. “We have to start asking ourselves, ‘What is the marker of success?’ because when we do this patients are feeling better.”

Multivariate analysis was used to identify factors predictive of progression to THA after the procedure, Dr. Fornari said. “Age of diagnosis, age of surgery, female gender, and lower hydroxyurea dose at surgery were predictive of advancing disease, whereas a higher dose of hydroxyurea was predictive against advancement,” he said.

The average age of patients who had no THA after either procedure was 21 years, compared with 33.9 years for those who had THA (P = .003). Average hydroxyurea dose at surgery was 24.7 mg/kg in the no-THA group vs. 12.5 mg/kg in those who had THA (P = .005).

Notably, there were no readmissions, fractures, deep vein thromboses, pulmonary embolisms or infarctions after CD, Dr. Fornari said. Transfusions were required in two CD-only and three CD+BMAC patients. Hospitalization rates for vaso-occlusive crisis were similar between groups (P = .103).

Dr. Fornari said the challenge is to identify suitable patients for these procedures. “These are complicated patients and you don’t want to put them through the process of having surgery, putting them on crutches and restricted weight bearing, if they’re not going to get better,” he said. “This procedure done minimally invasively is not the end all and be all, but we have to figure out who are the right patients for it. Patient selection is key.”

Finding those patients starts with a rigorous history and physical exam, he said. Physicians should have a “low threshold” for MRI in these patients because that will reveal findings, such as pre-collapse disease and characteristic of AVN lesions, that may appear normal on X-ray. Patient education is also important. “To think that an injection into the top of the hip is going to solve all their problems is a little naive, so you have to have an honest conversation with the patient,” he said.

Dr. Fornari reported having no financial disclosures.

SOURCE: Fornari ED et al. FSCDR 2019, Abstract JSCDH-D-19-00004.

FORT LAUDERDALE, FLA. – Orthopedic crises are common in patients with sickle cell disease, ranging from osteonecrosis to bone infarction, and physicians who manage these patients should know how to recognize these crises and not hesitate to consult an orthopedic surgeon early on, according to one expert at the annual meeting of the Foundation for Sickle Cell Disease Research.

Richard Mark Kirkner/MDedge News

“Sickle cell is a common entity in orthopedic surgery, so you shouldn’t hesitate in the hospital or outpatient settings to call for an orthopedic surgeon when you’re dealing with acute pain crises, medullary infarcts, and osteonecrosis,” said Mark W. Bridges, MD, an orthopedic surgeon with Orthopaedic Associates in Southern Florida.

Dr. Bridges noted that the femoral head is the most common location for osteonecrosis, one of the four major orthopedic manifestations of sickle cell disease that he reviewed. The others are septic arthritis, osteomyelitis, and bone infarction.

“Bone infarction is more common than osteomyelitis, and gadolinium-enhanced MRI can help to differentiate the two,” he said.

Osteonecrosis occurs when ischemic cells die, weakening the subchondral bone. Besides the femoral head, osteonecrosis commonly affects the humeral head of the shoulder and the femoral condyles of the knee. Dr. Bridges reviewed the five stages of the Ficat and Arlet classification of osteonecrosis:

• 0 – no pain, normal x-rays.
• I – pain, normal x-rays but abnormal MRI.
• II – pain, abnormal x-ray (sclerosis without collapse).
• III – pain (subchondral collapse without joint degeneration).
• IV – pain (arthritic changes with subchondral collapse).

For osteonecrosis of the shoulder, Dr. Bridges said four surgical options exist: core decompression for stages I and II; humeral head resurfacing for stages II and III; and hemiarthroplasty or total shoulder replacement for stages III and IV.

“No medical therapies are known to slow the progression,” he said.

Total joint replacement can be inevitable in these patients when total collapse of the joint occurs, but Dr. Bridges added a word of caution. “Overall when it comes down to replacing joints, there are more complications in patients that have [sickle cell disease],” he said. “Normally the complication rate is about 1%; that typically goes up to about 10% in SCD patients, but when you have a patient with end-stage disease – shoulder collapse or hip collapse – you have to do something.”

Septic arthritis is an infection within the joint space, most commonly the hip, and it affects 5% of children and 0.3% of adults with sickle cell disease (Clin Orthop Relat Res. 2010;468:1676-81).

“This is very similar to a vaso-occlusive crisis,” Dr. Bridges said.

MRI with gadolinium can help guide treatment, and blood cultures and joint aspiration can identify the infectious microbe. Staphylococcus aureus is the most common, Dr. Bridges said. Treatment consists of IV antibiotics, irrigation, and debridement.

Osteomyelitis is an infection within the bone with symptoms similar to those of septic arthritis, although osteomyelitis patients are typically sicker, he said. MRI with gadolinium is indicated in patients who don’t respond to IV fluid, oxygenation, and nonsteroidal anti-inflammatory drugs. “Try to treat them like they have vaso-occlusive crisis,” he said. Blood cultures usually suffice in these patients; bone aspiration is rarely needed, Dr. Bridges said.

The most common organisms are Staphylococcus aureus and Salmonella, and sickle cell disease patients can have infections in more than one location, Dr. Bridges noted.

“If IV antibiotics don’t work, then these patients need surgical debridement,” he added.

Adults are prone to a higher rate of complications than are children, including joint stiffness, osteonecrosis, pathologic fracture, and chronic osteomyelitis.

Ischemic marrow from vaso-occlusion can result in bone infarction. With its severe pain, swelling, erythema, and loss of motion, bone infarction can appear similar to osteomyelitis and septic arthritis, although a high-grade fever is uncommon in bone infarction. Unlike osteomyelitis, gadolinium on MRI does not enhance in bone infarction.

Treatment “consists of supportive management with pain medications, hydration, and antibiotics until osteomyelitis is ruled out,” Dr. Bridges said.

When a patient with one of these orthopedic conditions needs surgery, there are three considerations: preoperative transfusions to achieve hemoglobin level of 10 mg/dL for major procedures; no transfusions for arthroscopy and small closed reductions; and postoperative oxygenation and hydration to prevent a vaso-occlusive event and acute chest syndrome, he said.

Dr. Bridges reported having no conflicts of interest.

FORT LAUDERDALE, FLA. – Orthopedic crises are common in patients with sickle cell disease, ranging from osteonecrosis to bone infarction, and physicians who manage these patients should know how to recognize these crises and not hesitate to consult an orthopedic surgeon early on, according to one expert at the annual meeting of the Foundation for Sickle Cell Disease Research.

Richard Mark Kirkner/MDedge News

“Sickle cell is a common entity in orthopedic surgery, so you shouldn’t hesitate in the hospital or outpatient settings to call for an orthopedic surgeon when you’re dealing with acute pain crises, medullary infarcts, and osteonecrosis,” said Mark W. Bridges, MD, an orthopedic surgeon with Orthopaedic Associates in Southern Florida.

Dr. Bridges noted that the femoral head is the most common location for osteonecrosis, one of the four major orthopedic manifestations of sickle cell disease that he reviewed. The others are septic arthritis, osteomyelitis, and bone infarction.

“Bone infarction is more common than osteomyelitis, and gadolinium-enhanced MRI can help to differentiate the two,” he said.

Osteonecrosis occurs when ischemic cells die, weakening the subchondral bone. Besides the femoral head, osteonecrosis commonly affects the humeral head of the shoulder and the femoral condyles of the knee. Dr. Bridges reviewed the five stages of the Ficat and Arlet classification of osteonecrosis:

• 0 – no pain, normal x-rays.
• I – pain, normal x-rays but abnormal MRI.
• II – pain, abnormal x-ray (sclerosis without collapse).
• III – pain (subchondral collapse without joint degeneration).
• IV – pain (arthritic changes with subchondral collapse).

For osteonecrosis of the shoulder, Dr. Bridges said four surgical options exist: core decompression for stages I and II; humeral head resurfacing for stages II and III; and hemiarthroplasty or total shoulder replacement for stages III and IV.

“No medical therapies are known to slow the progression,” he said.

Total joint replacement can be inevitable in these patients when total collapse of the joint occurs, but Dr. Bridges added a word of caution. “Overall when it comes down to replacing joints, there are more complications in patients that have [sickle cell disease],” he said. “Normally the complication rate is about 1%; that typically goes up to about 10% in SCD patients, but when you have a patient with end-stage disease – shoulder collapse or hip collapse – you have to do something.”

Septic arthritis is an infection within the joint space, most commonly the hip, and it affects 5% of children and 0.3% of adults with sickle cell disease (Clin Orthop Relat Res. 2010;468:1676-81).

“This is very similar to a vaso-occlusive crisis,” Dr. Bridges said.

MRI with gadolinium can help guide treatment, and blood cultures and joint aspiration can identify the infectious microbe. Staphylococcus aureus is the most common, Dr. Bridges said. Treatment consists of IV antibiotics, irrigation, and debridement.

Osteomyelitis is an infection within the bone with symptoms similar to those of septic arthritis, although osteomyelitis patients are typically sicker, he said. MRI with gadolinium is indicated in patients who don’t respond to IV fluid, oxygenation, and nonsteroidal anti-inflammatory drugs. “Try to treat them like they have vaso-occlusive crisis,” he said. Blood cultures usually suffice in these patients; bone aspiration is rarely needed, Dr. Bridges said.

The most common organisms are Staphylococcus aureus and Salmonella, and sickle cell disease patients can have infections in more than one location, Dr. Bridges noted.

“If IV antibiotics don’t work, then these patients need surgical debridement,” he added.

Adults are prone to a higher rate of complications than are children, including joint stiffness, osteonecrosis, pathologic fracture, and chronic osteomyelitis.

Ischemic marrow from vaso-occlusion can result in bone infarction. With its severe pain, swelling, erythema, and loss of motion, bone infarction can appear similar to osteomyelitis and septic arthritis, although a high-grade fever is uncommon in bone infarction. Unlike osteomyelitis, gadolinium on MRI does not enhance in bone infarction.

Treatment “consists of supportive management with pain medications, hydration, and antibiotics until osteomyelitis is ruled out,” Dr. Bridges said.

When a patient with one of these orthopedic conditions needs surgery, there are three considerations: preoperative transfusions to achieve hemoglobin level of 10 mg/dL for major procedures; no transfusions for arthroscopy and small closed reductions; and postoperative oxygenation and hydration to prevent a vaso-occlusive event and acute chest syndrome, he said.

Dr. Bridges reported having no conflicts of interest.

FORT LAUDERDALE, FLA. – Orthopedic crises are common in patients with sickle cell disease, ranging from osteonecrosis to bone infarction, and physicians who manage these patients should know how to recognize these crises and not hesitate to consult an orthopedic surgeon early on, according to one expert at the annual meeting of the Foundation for Sickle Cell Disease Research.

Richard Mark Kirkner/MDedge News

“Sickle cell is a common entity in orthopedic surgery, so you shouldn’t hesitate in the hospital or outpatient settings to call for an orthopedic surgeon when you’re dealing with acute pain crises, medullary infarcts, and osteonecrosis,” said Mark W. Bridges, MD, an orthopedic surgeon with Orthopaedic Associates in Southern Florida.

Dr. Bridges noted that the femoral head is the most common location for osteonecrosis, one of the four major orthopedic manifestations of sickle cell disease that he reviewed. The others are septic arthritis, osteomyelitis, and bone infarction.

“Bone infarction is more common than osteomyelitis, and gadolinium-enhanced MRI can help to differentiate the two,” he said.

Osteonecrosis occurs when ischemic cells die, weakening the subchondral bone. Besides the femoral head, osteonecrosis commonly affects the humeral head of the shoulder and the femoral condyles of the knee. Dr. Bridges reviewed the five stages of the Ficat and Arlet classification of osteonecrosis:

• 0 – no pain, normal x-rays.
• I – pain, normal x-rays but abnormal MRI.
• II – pain, abnormal x-ray (sclerosis without collapse).
• III – pain (subchondral collapse without joint degeneration).
• IV – pain (arthritic changes with subchondral collapse).

For osteonecrosis of the shoulder, Dr. Bridges said four surgical options exist: core decompression for stages I and II; humeral head resurfacing for stages II and III; and hemiarthroplasty or total shoulder replacement for stages III and IV.

“No medical therapies are known to slow the progression,” he said.

Total joint replacement can be inevitable in these patients when total collapse of the joint occurs, but Dr. Bridges added a word of caution. “Overall when it comes down to replacing joints, there are more complications in patients that have [sickle cell disease],” he said. “Normally the complication rate is about 1%; that typically goes up to about 10% in SCD patients, but when you have a patient with end-stage disease – shoulder collapse or hip collapse – you have to do something.”

Septic arthritis is an infection within the joint space, most commonly the hip, and it affects 5% of children and 0.3% of adults with sickle cell disease (Clin Orthop Relat Res. 2010;468:1676-81).

“This is very similar to a vaso-occlusive crisis,” Dr. Bridges said.

MRI with gadolinium can help guide treatment, and blood cultures and joint aspiration can identify the infectious microbe. Staphylococcus aureus is the most common, Dr. Bridges said. Treatment consists of IV antibiotics, irrigation, and debridement.

Osteomyelitis is an infection within the bone with symptoms similar to those of septic arthritis, although osteomyelitis patients are typically sicker, he said. MRI with gadolinium is indicated in patients who don’t respond to IV fluid, oxygenation, and nonsteroidal anti-inflammatory drugs. “Try to treat them like they have vaso-occlusive crisis,” he said. Blood cultures usually suffice in these patients; bone aspiration is rarely needed, Dr. Bridges said.

The most common organisms are Staphylococcus aureus and Salmonella, and sickle cell disease patients can have infections in more than one location, Dr. Bridges noted.

“If IV antibiotics don’t work, then these patients need surgical debridement,” he added.

Adults are prone to a higher rate of complications than are children, including joint stiffness, osteonecrosis, pathologic fracture, and chronic osteomyelitis.

Ischemic marrow from vaso-occlusion can result in bone infarction. With its severe pain, swelling, erythema, and loss of motion, bone infarction can appear similar to osteomyelitis and septic arthritis, although a high-grade fever is uncommon in bone infarction. Unlike osteomyelitis, gadolinium on MRI does not enhance in bone infarction.

Treatment “consists of supportive management with pain medications, hydration, and antibiotics until osteomyelitis is ruled out,” Dr. Bridges said.

When a patient with one of these orthopedic conditions needs surgery, there are three considerations: preoperative transfusions to achieve hemoglobin level of 10 mg/dL for major procedures; no transfusions for arthroscopy and small closed reductions; and postoperative oxygenation and hydration to prevent a vaso-occlusive event and acute chest syndrome, he said.

Dr. Bridges reported having no conflicts of interest.

AMSTERDAM – When predicting the risk of thromboembolism in lymphoma patients receiving chemotherapy, clinicians can rely on a routine diagnostic tool: complete blood count, investigators reported.

Will Pass/MDedge News

A recent study found that high neutrophil to lymphocyte (NLR) and platelet to lymphocyte (PLR) ratios were prognostic for thromboembolism in this setting, reported lead author Vladimir Otasevic, MD, of the Clinical Centre of Serbia in Belgrade.

“Because of the presence of a broad spectrum of risk factors [in patients with lymphoma undergoing chemotherapy], some authors have published risk-assessment models for prediction of thromboembolism,” Dr. Otasevic said during a presentation at the annual congress of the European Hematology Association. While the underlying pathophysiology that precedes thromboembolism is complex, Dr. Otasevic suggested that risk prediction may not have to be, noting that NLR and PLR were recently proposed as risk biomarkers.

To test the utility of these potential biomarkers, Dr. Otasevic and his colleagues retrospectively analyzed data from 484 patients with non-Hodgkin and Hodgkin lymphoma who had undergone at least one cycle of chemotherapy at the Clinic for Hematology, Clinical Centre of Serbia. Patients were followed for venous and arterial thromboembolic events from the time of diagnosis to 3 months beyond their final cycle of chemotherapy. NLR and PLR ratios were calculated from complete blood count. Thromboembolism was diagnosed by radiography, clinical exam, and laboratory evaluation, with probable diagnoses reviewed by an internist and radiologist.

The median patient age was 53 years with a range from 18 to 89 years. Most patients were recently diagnosed with advanced disease (21.1% stage III and 42.5% stage IV). Half of the population had high-grade non-Hodgkin lymphoma (50.0%) and slightly more than a quarter had low-grade non-Hodgkin lymphoma (28.3%). Low-grade Hodgkin lymphoma was less common (17.4%) and followed distantly by other forms (4.3%).

Thirty-five patients (7.2%) developed thromboembolic events; of these, 30 had venous thromboembolism (6.2%), 6 had arterial thromboembolism (1.2%), and 1 had both. Patients who experienced thromboembolic events had significantly higher NLR and PLR than patients without thromboembolism, and both ratios were significantly associated with one another.

A positive NLR, defined as a ratio of 3.1 or more, was associated with a relative risk of 4.1 for thromboembolism (P less than .001), while a positive PLR, defined as a ratio of 10 or more, was associated with a relative risk of 2.9 (P = .008). Using a multivariate model, a positive NLR was associated with an even higher relative risk (RR = 4.5; P less than .001).

“NLR and PLR demonstrated significant powerfulness in prediction of future risk of [thromboembolism] in lymphoma patients,” the investigators concluded. “Simplicity, effectiveness, modesty, and practicability qualify these new tools for routine [thromboembolism] prognostic assessment.”

Dr. Otasevic said that he and his colleagues have plans to build on these findings with further analysis involving progression-free and overall survival.

The investigators reported no disclosures.

SOURCE: Otasevic V et al. EHA Congress, Abstract S1645.

AMSTERDAM – When predicting the risk of thromboembolism in lymphoma patients receiving chemotherapy, clinicians can rely on a routine diagnostic tool: complete blood count, investigators reported.

Will Pass/MDedge News

A recent study found that high neutrophil to lymphocyte (NLR) and platelet to lymphocyte (PLR) ratios were prognostic for thromboembolism in this setting, reported lead author Vladimir Otasevic, MD, of the Clinical Centre of Serbia in Belgrade.

“Because of the presence of a broad spectrum of risk factors [in patients with lymphoma undergoing chemotherapy], some authors have published risk-assessment models for prediction of thromboembolism,” Dr. Otasevic said during a presentation at the annual congress of the European Hematology Association. While the underlying pathophysiology that precedes thromboembolism is complex, Dr. Otasevic suggested that risk prediction may not have to be, noting that NLR and PLR were recently proposed as risk biomarkers.

To test the utility of these potential biomarkers, Dr. Otasevic and his colleagues retrospectively analyzed data from 484 patients with non-Hodgkin and Hodgkin lymphoma who had undergone at least one cycle of chemotherapy at the Clinic for Hematology, Clinical Centre of Serbia. Patients were followed for venous and arterial thromboembolic events from the time of diagnosis to 3 months beyond their final cycle of chemotherapy. NLR and PLR ratios were calculated from complete blood count. Thromboembolism was diagnosed by radiography, clinical exam, and laboratory evaluation, with probable diagnoses reviewed by an internist and radiologist.

The median patient age was 53 years with a range from 18 to 89 years. Most patients were recently diagnosed with advanced disease (21.1% stage III and 42.5% stage IV). Half of the population had high-grade non-Hodgkin lymphoma (50.0%) and slightly more than a quarter had low-grade non-Hodgkin lymphoma (28.3%). Low-grade Hodgkin lymphoma was less common (17.4%) and followed distantly by other forms (4.3%).

Thirty-five patients (7.2%) developed thromboembolic events; of these, 30 had venous thromboembolism (6.2%), 6 had arterial thromboembolism (1.2%), and 1 had both. Patients who experienced thromboembolic events had significantly higher NLR and PLR than patients without thromboembolism, and both ratios were significantly associated with one another.

A positive NLR, defined as a ratio of 3.1 or more, was associated with a relative risk of 4.1 for thromboembolism (P less than .001), while a positive PLR, defined as a ratio of 10 or more, was associated with a relative risk of 2.9 (P = .008). Using a multivariate model, a positive NLR was associated with an even higher relative risk (RR = 4.5; P less than .001).

“NLR and PLR demonstrated significant powerfulness in prediction of future risk of [thromboembolism] in lymphoma patients,” the investigators concluded. “Simplicity, effectiveness, modesty, and practicability qualify these new tools for routine [thromboembolism] prognostic assessment.”

Dr. Otasevic said that he and his colleagues have plans to build on these findings with further analysis involving progression-free and overall survival.

The investigators reported no disclosures.

SOURCE: Otasevic V et al. EHA Congress, Abstract S1645.

AMSTERDAM – When predicting the risk of thromboembolism in lymphoma patients receiving chemotherapy, clinicians can rely on a routine diagnostic tool: complete blood count, investigators reported.

Will Pass/MDedge News

A recent study found that high neutrophil to lymphocyte (NLR) and platelet to lymphocyte (PLR) ratios were prognostic for thromboembolism in this setting, reported lead author Vladimir Otasevic, MD, of the Clinical Centre of Serbia in Belgrade.

“Because of the presence of a broad spectrum of risk factors [in patients with lymphoma undergoing chemotherapy], some authors have published risk-assessment models for prediction of thromboembolism,” Dr. Otasevic said during a presentation at the annual congress of the European Hematology Association. While the underlying pathophysiology that precedes thromboembolism is complex, Dr. Otasevic suggested that risk prediction may not have to be, noting that NLR and PLR were recently proposed as risk biomarkers.

To test the utility of these potential biomarkers, Dr. Otasevic and his colleagues retrospectively analyzed data from 484 patients with non-Hodgkin and Hodgkin lymphoma who had undergone at least one cycle of chemotherapy at the Clinic for Hematology, Clinical Centre of Serbia. Patients were followed for venous and arterial thromboembolic events from the time of diagnosis to 3 months beyond their final cycle of chemotherapy. NLR and PLR ratios were calculated from complete blood count. Thromboembolism was diagnosed by radiography, clinical exam, and laboratory evaluation, with probable diagnoses reviewed by an internist and radiologist.

The median patient age was 53 years with a range from 18 to 89 years. Most patients were recently diagnosed with advanced disease (21.1% stage III and 42.5% stage IV). Half of the population had high-grade non-Hodgkin lymphoma (50.0%) and slightly more than a quarter had low-grade non-Hodgkin lymphoma (28.3%). Low-grade Hodgkin lymphoma was less common (17.4%) and followed distantly by other forms (4.3%).

Thirty-five patients (7.2%) developed thromboembolic events; of these, 30 had venous thromboembolism (6.2%), 6 had arterial thromboembolism (1.2%), and 1 had both. Patients who experienced thromboembolic events had significantly higher NLR and PLR than patients without thromboembolism, and both ratios were significantly associated with one another.

A positive NLR, defined as a ratio of 3.1 or more, was associated with a relative risk of 4.1 for thromboembolism (P less than .001), while a positive PLR, defined as a ratio of 10 or more, was associated with a relative risk of 2.9 (P = .008). Using a multivariate model, a positive NLR was associated with an even higher relative risk (RR = 4.5; P less than .001).

“NLR and PLR demonstrated significant powerfulness in prediction of future risk of [thromboembolism] in lymphoma patients,” the investigators concluded. “Simplicity, effectiveness, modesty, and practicability qualify these new tools for routine [thromboembolism] prognostic assessment.”

Dr. Otasevic said that he and his colleagues have plans to build on these findings with further analysis involving progression-free and overall survival.

The investigators reported no disclosures.

SOURCE: Otasevic V et al. EHA Congress, Abstract S1645.

AMSTERDAM – Patients with relapsed or refractory acute myeloid leukemia (AML) may be more likely to respond when selinexor is added to standard chemotherapy, according to investigators.

Will Pass/MDedge News

In a recent phase 2 trial, selinexor given with cytarabine and idarubicin led to a 50% overall response rate, reported lead author Walter Fiedler, MD, of University Medical Center Hamburg-Eppendorf (Germany). This response rate is at the upper end of what has been seen in published studies, Dr. Fiedler said at the annual congress of the European Hematology Association.

He also noted that giving a flat dose of selinexor improved tolerability in the trial, a significant finding in light of common adverse events and recent concerns from the Food and Drug Administration about the safety of selinexor for patients with multiple myeloma.

“The rationale to employ selinexor in this study is that there is a synergy between anthracyclines and selinexor,” Dr. Fiedler said, which may restore anthracycline sensitivity in relapsed or refractory patients. “Secondly, there is a c-myc reduction pathway that leads to a reduction of DNA damage repair genes such as Rad51 and Chk1, and this might result in inhibition of homologous recombination.”

The study involved 44 patients with relapsed or refractory AML, of whom 17 (39%) had previously received stem cell transplantation and 11 (25%) exhibited therapy-induced or secondary disease. The median patient age was 59.5 years.

Patients were given idarubicin 10 mg/m² on days 1, 3, and 5, and cytarabine 100 mg/m² on days 1-7. Initially, selinexor was given at a dose of 40 mg/m² twice per week for 4 weeks, but this led to high rates of febrile neutropenia and grade 3 or higher diarrhea, along with prolonged aplasia. In response to this issue, after the first 27 patients, the dose was reduced to a flat amount of 60 mg, given twice weekly for 3 weeks.

For patients not undergoing transplantation after the first or second induction cycle, selinexor maintenance monotherapy was offered for up to 1 year.

The primary endpoint was overall remission rate, reported as complete remission, complete remission with incomplete blood count recovery, and morphological leukemia-free status. Secondary endpoints included the rate of partial remissions, percentage of patients being transplanted after induction, early death rate, overall survival, event-free survival, and relapse-free survival.

The efficacy analysis revealed an overall response rate of 50%. A total of 9 patients had complete remission (21.4%), 11 achieved complete remission with incomplete blood count recovery (26.2%), and 1 exhibited morphological leukemia-free status (2.4%). Of note, almost half of the patients (47%) who had relapsed after previous stem cell transplantation responded, as did three-quarters who tested positive for an NPM1 mutation. After a median follow-up of 8.2 months, the median overall survival was 8.2 months, relapse-free survival was 17.7 months, and event-free survival was 4.9 months.

Adverse events occurred frequently, with a majority of patients experiencing nausea (86%), diarrhea (83%), vomiting (74%), decreased appetite (71%), febrile neutropenia (67%), fatigue (64%), leukopenia (62%), thrombocytopenia (62%), or anemia (60%).

Grade 3 or higher adverse events were almost as common, and included febrile neutropenia (67%), leukopenia (62%), thrombocytopenia (62%), anemia (57%), and diarrhea (50%). Reducing the dose did improve tolerability, with notable drops in the rate of severe diarrhea (56% vs. 40%) and febrile neutropenia (85% vs. 33%). In total, 19% of patients discontinued treatment because of adverse events.

A total of 25 patients (60%) died during the study, with about half dying from disease progression (n = 12), and fewer succumbing to infectious complications, graft-versus-host disease, multiorgan failure, multiple brain infarct, or asystole. Two deaths, one from suspected hemophagocytosis and another from systemic inflammatory response syndrome, were considered possibly related to selinexor.

“The results should be further evaluated in a phase 3 study,” Dr. Fiedler said. However, plans for this are not yet underway, he said, adding that Karyopharm Therapeutics will be focusing its efforts on selinexor for myeloma first.

The study was funded by Karyopharm. Dr. Fielder reported financial relationships with Amgen, Pfizer, Jazz Pharmaceuticals, and other companies.

SOURCE: Fiedler W et al. EHA Congress, Abstract S880.

AMSTERDAM – Patients with relapsed or refractory acute myeloid leukemia (AML) may be more likely to respond when selinexor is added to standard chemotherapy, according to investigators.

Will Pass/MDedge News

In a recent phase 2 trial, selinexor given with cytarabine and idarubicin led to a 50% overall response rate, reported lead author Walter Fiedler, MD, of University Medical Center Hamburg-Eppendorf (Germany). This response rate is at the upper end of what has been seen in published studies, Dr. Fiedler said at the annual congress of the European Hematology Association.

He also noted that giving a flat dose of selinexor improved tolerability in the trial, a significant finding in light of common adverse events and recent concerns from the Food and Drug Administration about the safety of selinexor for patients with multiple myeloma.

“The rationale to employ selinexor in this study is that there is a synergy between anthracyclines and selinexor,” Dr. Fiedler said, which may restore anthracycline sensitivity in relapsed or refractory patients. “Secondly, there is a c-myc reduction pathway that leads to a reduction of DNA damage repair genes such as Rad51 and Chk1, and this might result in inhibition of homologous recombination.”

The study involved 44 patients with relapsed or refractory AML, of whom 17 (39%) had previously received stem cell transplantation and 11 (25%) exhibited therapy-induced or secondary disease. The median patient age was 59.5 years.

Patients were given idarubicin 10 mg/m² on days 1, 3, and 5, and cytarabine 100 mg/m² on days 1-7. Initially, selinexor was given at a dose of 40 mg/m² twice per week for 4 weeks, but this led to high rates of febrile neutropenia and grade 3 or higher diarrhea, along with prolonged aplasia. In response to this issue, after the first 27 patients, the dose was reduced to a flat amount of 60 mg, given twice weekly for 3 weeks.

For patients not undergoing transplantation after the first or second induction cycle, selinexor maintenance monotherapy was offered for up to 1 year.

The primary endpoint was overall remission rate, reported as complete remission, complete remission with incomplete blood count recovery, and morphological leukemia-free status. Secondary endpoints included the rate of partial remissions, percentage of patients being transplanted after induction, early death rate, overall survival, event-free survival, and relapse-free survival.

The efficacy analysis revealed an overall response rate of 50%. A total of 9 patients had complete remission (21.4%), 11 achieved complete remission with incomplete blood count recovery (26.2%), and 1 exhibited morphological leukemia-free status (2.4%). Of note, almost half of the patients (47%) who had relapsed after previous stem cell transplantation responded, as did three-quarters who tested positive for an NPM1 mutation. After a median follow-up of 8.2 months, the median overall survival was 8.2 months, relapse-free survival was 17.7 months, and event-free survival was 4.9 months.

Adverse events occurred frequently, with a majority of patients experiencing nausea (86%), diarrhea (83%), vomiting (74%), decreased appetite (71%), febrile neutropenia (67%), fatigue (64%), leukopenia (62%), thrombocytopenia (62%), or anemia (60%).

Grade 3 or higher adverse events were almost as common, and included febrile neutropenia (67%), leukopenia (62%), thrombocytopenia (62%), anemia (57%), and diarrhea (50%). Reducing the dose did improve tolerability, with notable drops in the rate of severe diarrhea (56% vs. 40%) and febrile neutropenia (85% vs. 33%). In total, 19% of patients discontinued treatment because of adverse events.

A total of 25 patients (60%) died during the study, with about half dying from disease progression (n = 12), and fewer succumbing to infectious complications, graft-versus-host disease, multiorgan failure, multiple brain infarct, or asystole. Two deaths, one from suspected hemophagocytosis and another from systemic inflammatory response syndrome, were considered possibly related to selinexor.

“The results should be further evaluated in a phase 3 study,” Dr. Fiedler said. However, plans for this are not yet underway, he said, adding that Karyopharm Therapeutics will be focusing its efforts on selinexor for myeloma first.

The study was funded by Karyopharm. Dr. Fielder reported financial relationships with Amgen, Pfizer, Jazz Pharmaceuticals, and other companies.

SOURCE: Fiedler W et al. EHA Congress, Abstract S880.

AMSTERDAM – Patients with relapsed or refractory acute myeloid leukemia (AML) may be more likely to respond when selinexor is added to standard chemotherapy, according to investigators.

Will Pass/MDedge News

In a recent phase 2 trial, selinexor given with cytarabine and idarubicin led to a 50% overall response rate, reported lead author Walter Fiedler, MD, of University Medical Center Hamburg-Eppendorf (Germany). This response rate is at the upper end of what has been seen in published studies, Dr. Fiedler said at the annual congress of the European Hematology Association.

He also noted that giving a flat dose of selinexor improved tolerability in the trial, a significant finding in light of common adverse events and recent concerns from the Food and Drug Administration about the safety of selinexor for patients with multiple myeloma.

“The rationale to employ selinexor in this study is that there is a synergy between anthracyclines and selinexor,” Dr. Fiedler said, which may restore anthracycline sensitivity in relapsed or refractory patients. “Secondly, there is a c-myc reduction pathway that leads to a reduction of DNA damage repair genes such as Rad51 and Chk1, and this might result in inhibition of homologous recombination.”

The study involved 44 patients with relapsed or refractory AML, of whom 17 (39%) had previously received stem cell transplantation and 11 (25%) exhibited therapy-induced or secondary disease. The median patient age was 59.5 years.

Patients were given idarubicin 10 mg/m² on days 1, 3, and 5, and cytarabine 100 mg/m² on days 1-7. Initially, selinexor was given at a dose of 40 mg/m² twice per week for 4 weeks, but this led to high rates of febrile neutropenia and grade 3 or higher diarrhea, along with prolonged aplasia. In response to this issue, after the first 27 patients, the dose was reduced to a flat amount of 60 mg, given twice weekly for 3 weeks.

For patients not undergoing transplantation after the first or second induction cycle, selinexor maintenance monotherapy was offered for up to 1 year.

The primary endpoint was overall remission rate, reported as complete remission, complete remission with incomplete blood count recovery, and morphological leukemia-free status. Secondary endpoints included the rate of partial remissions, percentage of patients being transplanted after induction, early death rate, overall survival, event-free survival, and relapse-free survival.

The efficacy analysis revealed an overall response rate of 50%. A total of 9 patients had complete remission (21.4%), 11 achieved complete remission with incomplete blood count recovery (26.2%), and 1 exhibited morphological leukemia-free status (2.4%). Of note, almost half of the patients (47%) who had relapsed after previous stem cell transplantation responded, as did three-quarters who tested positive for an NPM1 mutation. After a median follow-up of 8.2 months, the median overall survival was 8.2 months, relapse-free survival was 17.7 months, and event-free survival was 4.9 months.

Adverse events occurred frequently, with a majority of patients experiencing nausea (86%), diarrhea (83%), vomiting (74%), decreased appetite (71%), febrile neutropenia (67%), fatigue (64%), leukopenia (62%), thrombocytopenia (62%), or anemia (60%).

Grade 3 or higher adverse events were almost as common, and included febrile neutropenia (67%), leukopenia (62%), thrombocytopenia (62%), anemia (57%), and diarrhea (50%). Reducing the dose did improve tolerability, with notable drops in the rate of severe diarrhea (56% vs. 40%) and febrile neutropenia (85% vs. 33%). In total, 19% of patients discontinued treatment because of adverse events.

A total of 25 patients (60%) died during the study, with about half dying from disease progression (n = 12), and fewer succumbing to infectious complications, graft-versus-host disease, multiorgan failure, multiple brain infarct, or asystole. Two deaths, one from suspected hemophagocytosis and another from systemic inflammatory response syndrome, were considered possibly related to selinexor.

“The results should be further evaluated in a phase 3 study,” Dr. Fiedler said. However, plans for this are not yet underway, he said, adding that Karyopharm Therapeutics will be focusing its efforts on selinexor for myeloma first.

The study was funded by Karyopharm. Dr. Fielder reported financial relationships with Amgen, Pfizer, Jazz Pharmaceuticals, and other companies.

SOURCE: Fiedler W et al. EHA Congress, Abstract S880.

AMSTERDAM – Rozanolixizumab, a subcutaneous antibody for the human neonatal Fc receptor, provides clinically meaningful improvements in platelet count for patients with primary immune thrombocytopenia, according to results from a recent phase 2 trial.

Rozanolixizumab was well tolerated across all dose groups, with higher doses delivering faster responses, reported lead author Tadeusz Robak, MD, PhD, of the Medical University of Lodz (Poland).

Targeting the Fc receptor interrupts recirculation of IgG, a key autoantibody in immune thrombocytopenia (ITP) pathogenesis, Dr. Robak explained during a presentation at the annual congress of the European Hematology Association. This approach represents an emerging treatment paradigm, he said, noting that rozanolixizumab is also being studied for the treatment of other IgG-driven autoimmune diseases, such as myasthenia gravis and chronic inflammatory demyelinating polyneuropathy.

The present open-label, dose-escalation study involved 54 adult patients with primary ITP of at least 3 months duration and platelet counts of less than 30 x 10⁹/L at screening and 35 x 10⁹/L at baseline. Eligibility required a previous response to ITP therapy. Enrolled patients were randomized into four dose groups: 4 mg/kg (five doses), 7 mg/kg (three doses), 10 mg/kg (two doses), or 15 mg/kg (one dose). After dosing, patients were followed for 8 weeks. Clinically relevant efficacy was defined as a platelet count of at least 50 x 10⁹/L. Decreases in IgG were also reported.

A safety analysis showed that the regimen was well tolerated across all dose groups. In total, 20.4% of patients experienced at least one treatment-related adverse event. The most common adverse events were headache (31.5%), diarrhea (11.1%), and vomiting (3.7%); all of which were mild or moderate. Headache appeared to be dose related, as 42% of patients in the 15-mg/kg group reported headache, compared with 8% in the 10-mg/kg group, 7% in the 7-mg/kg group, and none in the 4-mg/kg group. Out of four reported serious adverse events, none were considered treatment related.

Concerning efficacy, higher doses were associated with higher response rates and faster response times. In the 4-mg/kg group, 33% of patients achieved a platelet count of at least 50 x 10⁹/L, compared with 33% of the 7-mg/kg group, 50% of the 10-mg/kg group, and 67% of the 15-mg/kg group. Of the patients that achieved clinically meaningful responses, 20% of the 4-mg/kg group did so within 8 days, compared with 40% of 7-mg/kg responders, 50% of 10-mg/kg responders, and 87.5% of 15-mg/kg responders. Additional observations included dose-dependent decreases in IgG titer and longer response durations after multiple lower doses.

“Data from this study indicate that we can achieve effective increases in platelet levels, we can observe decreasing IgG levels, and the treatment was safe for the patients,” Dr. Robak said.

When asked about the intended clinical application of rozanolixizumab, Dr. Robak suggested that the agent may have a role in the postacute care setting. “We should develop a method of prolonged administration of [rozanolixizumab], as we saw that lower, multiple doses gave longer response durations.”

Still, he noted that more research is needed, since responses in diverse patient populations remain unknown. “We do not know how the drug will be active in truly refractory patients and we need this response before we establish the indication for the drug.”

The investigators reported financial relationships with Celgene, Roche, GlaxoSmithKline, Amgen, AbbVie, and other companies.

SOURCE: Robak T et al. EHA Congress, Abstract S850.

AMSTERDAM – Rozanolixizumab, a subcutaneous antibody for the human neonatal Fc receptor, provides clinically meaningful improvements in platelet count for patients with primary immune thrombocytopenia, according to results from a recent phase 2 trial.

Rozanolixizumab was well tolerated across all dose groups, with higher doses delivering faster responses, reported lead author Tadeusz Robak, MD, PhD, of the Medical University of Lodz (Poland).

Targeting the Fc receptor interrupts recirculation of IgG, a key autoantibody in immune thrombocytopenia (ITP) pathogenesis, Dr. Robak explained during a presentation at the annual congress of the European Hematology Association. This approach represents an emerging treatment paradigm, he said, noting that rozanolixizumab is also being studied for the treatment of other IgG-driven autoimmune diseases, such as myasthenia gravis and chronic inflammatory demyelinating polyneuropathy.

The present open-label, dose-escalation study involved 54 adult patients with primary ITP of at least 3 months duration and platelet counts of less than 30 x 10⁹/L at screening and 35 x 10⁹/L at baseline. Eligibility required a previous response to ITP therapy. Enrolled patients were randomized into four dose groups: 4 mg/kg (five doses), 7 mg/kg (three doses), 10 mg/kg (two doses), or 15 mg/kg (one dose). After dosing, patients were followed for 8 weeks. Clinically relevant efficacy was defined as a platelet count of at least 50 x 10⁹/L. Decreases in IgG were also reported.

A safety analysis showed that the regimen was well tolerated across all dose groups. In total, 20.4% of patients experienced at least one treatment-related adverse event. The most common adverse events were headache (31.5%), diarrhea (11.1%), and vomiting (3.7%); all of which were mild or moderate. Headache appeared to be dose related, as 42% of patients in the 15-mg/kg group reported headache, compared with 8% in the 10-mg/kg group, 7% in the 7-mg/kg group, and none in the 4-mg/kg group. Out of four reported serious adverse events, none were considered treatment related.

Concerning efficacy, higher doses were associated with higher response rates and faster response times. In the 4-mg/kg group, 33% of patients achieved a platelet count of at least 50 x 10⁹/L, compared with 33% of the 7-mg/kg group, 50% of the 10-mg/kg group, and 67% of the 15-mg/kg group. Of the patients that achieved clinically meaningful responses, 20% of the 4-mg/kg group did so within 8 days, compared with 40% of 7-mg/kg responders, 50% of 10-mg/kg responders, and 87.5% of 15-mg/kg responders. Additional observations included dose-dependent decreases in IgG titer and longer response durations after multiple lower doses.

“Data from this study indicate that we can achieve effective increases in platelet levels, we can observe decreasing IgG levels, and the treatment was safe for the patients,” Dr. Robak said.

When asked about the intended clinical application of rozanolixizumab, Dr. Robak suggested that the agent may have a role in the postacute care setting. “We should develop a method of prolonged administration of [rozanolixizumab], as we saw that lower, multiple doses gave longer response durations.”

Still, he noted that more research is needed, since responses in diverse patient populations remain unknown. “We do not know how the drug will be active in truly refractory patients and we need this response before we establish the indication for the drug.”

The investigators reported financial relationships with Celgene, Roche, GlaxoSmithKline, Amgen, AbbVie, and other companies.

SOURCE: Robak T et al. EHA Congress, Abstract S850.

AMSTERDAM – Rozanolixizumab, a subcutaneous antibody for the human neonatal Fc receptor, provides clinically meaningful improvements in platelet count for patients with primary immune thrombocytopenia, according to results from a recent phase 2 trial.

Rozanolixizumab was well tolerated across all dose groups, with higher doses delivering faster responses, reported lead author Tadeusz Robak, MD, PhD, of the Medical University of Lodz (Poland).

Targeting the Fc receptor interrupts recirculation of IgG, a key autoantibody in immune thrombocytopenia (ITP) pathogenesis, Dr. Robak explained during a presentation at the annual congress of the European Hematology Association. This approach represents an emerging treatment paradigm, he said, noting that rozanolixizumab is also being studied for the treatment of other IgG-driven autoimmune diseases, such as myasthenia gravis and chronic inflammatory demyelinating polyneuropathy.

The present open-label, dose-escalation study involved 54 adult patients with primary ITP of at least 3 months duration and platelet counts of less than 30 x 10⁹/L at screening and 35 x 10⁹/L at baseline. Eligibility required a previous response to ITP therapy. Enrolled patients were randomized into four dose groups: 4 mg/kg (five doses), 7 mg/kg (three doses), 10 mg/kg (two doses), or 15 mg/kg (one dose). After dosing, patients were followed for 8 weeks. Clinically relevant efficacy was defined as a platelet count of at least 50 x 10⁹/L. Decreases in IgG were also reported.

A safety analysis showed that the regimen was well tolerated across all dose groups. In total, 20.4% of patients experienced at least one treatment-related adverse event. The most common adverse events were headache (31.5%), diarrhea (11.1%), and vomiting (3.7%); all of which were mild or moderate. Headache appeared to be dose related, as 42% of patients in the 15-mg/kg group reported headache, compared with 8% in the 10-mg/kg group, 7% in the 7-mg/kg group, and none in the 4-mg/kg group. Out of four reported serious adverse events, none were considered treatment related.

Concerning efficacy, higher doses were associated with higher response rates and faster response times. In the 4-mg/kg group, 33% of patients achieved a platelet count of at least 50 x 10⁹/L, compared with 33% of the 7-mg/kg group, 50% of the 10-mg/kg group, and 67% of the 15-mg/kg group. Of the patients that achieved clinically meaningful responses, 20% of the 4-mg/kg group did so within 8 days, compared with 40% of 7-mg/kg responders, 50% of 10-mg/kg responders, and 87.5% of 15-mg/kg responders. Additional observations included dose-dependent decreases in IgG titer and longer response durations after multiple lower doses.

“Data from this study indicate that we can achieve effective increases in platelet levels, we can observe decreasing IgG levels, and the treatment was safe for the patients,” Dr. Robak said.

When asked about the intended clinical application of rozanolixizumab, Dr. Robak suggested that the agent may have a role in the postacute care setting. “We should develop a method of prolonged administration of [rozanolixizumab], as we saw that lower, multiple doses gave longer response durations.”

Still, he noted that more research is needed, since responses in diverse patient populations remain unknown. “We do not know how the drug will be active in truly refractory patients and we need this response before we establish the indication for the drug.”

The investigators reported financial relationships with Celgene, Roche, GlaxoSmithKline, Amgen, AbbVie, and other companies.

SOURCE: Robak T et al. EHA Congress, Abstract S850.

FORT LAUDERDALE, FLA. – When the Food and Drug Administration in 2017 approved L-glutamine (Endari) to treat the symptoms of sickle cell disease (SCD), it was the first new drug indicated for the condition in nearly two decades. But a small study of sickle cell patients in New York has found that patients are having difficulty obtaining the drug and sticking to the regimen.

bubaone/DigitalVision Vectors

“We found out that there are multiple barriers, mostly insurance related, and that after 10 months only one-fifth of the patients were still actively taking this medication,” said Ugochi Ogu, MD, assistant director of the Sickle Cell Center for Adults at Montefiore Medical Center in New York. She presented preliminary study results at the annual meeting of the Foundation for Sickle Cell Disease Research.

L-glutamine oral powder is taken twice a day to treat the symptoms of SCD. GoodRx reports that the average cash price for a 60-day supply of L-glutamine is $2,773.

The study followed 101 patients prescribed L-glutamine at the Montefiore Medical Center. When they returned to the clinic, patients were asked about barriers to obtaining the medication and adherence to the twice-a-day dosing. The center used a nearby local specialty pharmacy to fill the prescriptions.

The study also evaluated adherence by calculating the mean possession ratio (MPR) utilizing pharmacy records. The average age of the patient population was 36 years, and 56% were women.

It’s the first study of L-glutamine barriers and adherence in SCD patients in the real-world setting, Dr. Ogu said.

At the end of the 10-month study period, 21% of the patients were actively taking the medication, she said. “Forty-three percent had discontinued the medication, and 33% never filled the prescriptions; 4% had received but never started Endari,” Dr. Ogu said.

Of the patients who never filled the prescriptions, Dr. Ogu reported that 27% said their insurer denied prior authorization, 19% said their deductible was too high, and 16% cited other insurance issues.

“So we can see that insurance alone accounted for over 60% of why patients did not receive or could not start the medication,” she said.

Most patients – 94% – either had Medicare or Medicaid; the remainder had private insurance.

Among the 43% of all study patients who stopped taking the medication, reasons given include poor adherence (47%), side effects (9%), pregnancy and breast feeding (5%), and no perceived benefit (5%), Dr. Ogu said. At the outset, pharmacy records estimated adherence at 74% by using the average MPR, a rate similar to the phase 3 trial adherence rate of 77.4%.

Patient education is important to eliminate these barriers to treatment for SCD, Dr. Ogu said. “The patients need to understand why they’re taking whatever medication you prescribe. We need to educate them about the side effects, and we need to make them understand why it’s important to take certain medications or how they’re going to help them,” she said.

But even more important, she added, is a systems-based method to deal with insurance barriers. “If 62% of the patients did not get the medication due to insurance issues, I don’t think we’re doing a good job of making it accessible to them.”

Dr. Ogu reported a financial relationship with Vertex.

SOURCE: Ogu U et al. FSCDR 2019, Abstract JSCDH-D-19-00041.




 

FORT LAUDERDALE, FLA. – When the Food and Drug Administration in 2017 approved L-glutamine (Endari) to treat the symptoms of sickle cell disease (SCD), it was the first new drug indicated for the condition in nearly two decades. But a small study of sickle cell patients in New York has found that patients are having difficulty obtaining the drug and sticking to the regimen.

bubaone/DigitalVision Vectors

“We found out that there are multiple barriers, mostly insurance related, and that after 10 months only one-fifth of the patients were still actively taking this medication,” said Ugochi Ogu, MD, assistant director of the Sickle Cell Center for Adults at Montefiore Medical Center in New York. She presented preliminary study results at the annual meeting of the Foundation for Sickle Cell Disease Research.

L-glutamine oral powder is taken twice a day to treat the symptoms of SCD. GoodRx reports that the average cash price for a 60-day supply of L-glutamine is $2,773.

The study followed 101 patients prescribed L-glutamine at the Montefiore Medical Center. When they returned to the clinic, patients were asked about barriers to obtaining the medication and adherence to the twice-a-day dosing. The center used a nearby local specialty pharmacy to fill the prescriptions.

The study also evaluated adherence by calculating the mean possession ratio (MPR) utilizing pharmacy records. The average age of the patient population was 36 years, and 56% were women.

It’s the first study of L-glutamine barriers and adherence in SCD patients in the real-world setting, Dr. Ogu said.

At the end of the 10-month study period, 21% of the patients were actively taking the medication, she said. “Forty-three percent had discontinued the medication, and 33% never filled the prescriptions; 4% had received but never started Endari,” Dr. Ogu said.

Of the patients who never filled the prescriptions, Dr. Ogu reported that 27% said their insurer denied prior authorization, 19% said their deductible was too high, and 16% cited other insurance issues.

“So we can see that insurance alone accounted for over 60% of why patients did not receive or could not start the medication,” she said.

Most patients – 94% – either had Medicare or Medicaid; the remainder had private insurance.

Among the 43% of all study patients who stopped taking the medication, reasons given include poor adherence (47%), side effects (9%), pregnancy and breast feeding (5%), and no perceived benefit (5%), Dr. Ogu said. At the outset, pharmacy records estimated adherence at 74% by using the average MPR, a rate similar to the phase 3 trial adherence rate of 77.4%.

Patient education is important to eliminate these barriers to treatment for SCD, Dr. Ogu said. “The patients need to understand why they’re taking whatever medication you prescribe. We need to educate them about the side effects, and we need to make them understand why it’s important to take certain medications or how they’re going to help them,” she said.

But even more important, she added, is a systems-based method to deal with insurance barriers. “If 62% of the patients did not get the medication due to insurance issues, I don’t think we’re doing a good job of making it accessible to them.”

Dr. Ogu reported a financial relationship with Vertex.

SOURCE: Ogu U et al. FSCDR 2019, Abstract JSCDH-D-19-00041.




 

FORT LAUDERDALE, FLA. – When the Food and Drug Administration in 2017 approved L-glutamine (Endari) to treat the symptoms of sickle cell disease (SCD), it was the first new drug indicated for the condition in nearly two decades. But a small study of sickle cell patients in New York has found that patients are having difficulty obtaining the drug and sticking to the regimen.

bubaone/DigitalVision Vectors

“We found out that there are multiple barriers, mostly insurance related, and that after 10 months only one-fifth of the patients were still actively taking this medication,” said Ugochi Ogu, MD, assistant director of the Sickle Cell Center for Adults at Montefiore Medical Center in New York. She presented preliminary study results at the annual meeting of the Foundation for Sickle Cell Disease Research.

L-glutamine oral powder is taken twice a day to treat the symptoms of SCD. GoodRx reports that the average cash price for a 60-day supply of L-glutamine is $2,773.

The study followed 101 patients prescribed L-glutamine at the Montefiore Medical Center. When they returned to the clinic, patients were asked about barriers to obtaining the medication and adherence to the twice-a-day dosing. The center used a nearby local specialty pharmacy to fill the prescriptions.

The study also evaluated adherence by calculating the mean possession ratio (MPR) utilizing pharmacy records. The average age of the patient population was 36 years, and 56% were women.

It’s the first study of L-glutamine barriers and adherence in SCD patients in the real-world setting, Dr. Ogu said.

At the end of the 10-month study period, 21% of the patients were actively taking the medication, she said. “Forty-three percent had discontinued the medication, and 33% never filled the prescriptions; 4% had received but never started Endari,” Dr. Ogu said.

Of the patients who never filled the prescriptions, Dr. Ogu reported that 27% said their insurer denied prior authorization, 19% said their deductible was too high, and 16% cited other insurance issues.

“So we can see that insurance alone accounted for over 60% of why patients did not receive or could not start the medication,” she said.

Most patients – 94% – either had Medicare or Medicaid; the remainder had private insurance.

Among the 43% of all study patients who stopped taking the medication, reasons given include poor adherence (47%), side effects (9%), pregnancy and breast feeding (5%), and no perceived benefit (5%), Dr. Ogu said. At the outset, pharmacy records estimated adherence at 74% by using the average MPR, a rate similar to the phase 3 trial adherence rate of 77.4%.

Patient education is important to eliminate these barriers to treatment for SCD, Dr. Ogu said. “The patients need to understand why they’re taking whatever medication you prescribe. We need to educate them about the side effects, and we need to make them understand why it’s important to take certain medications or how they’re going to help them,” she said.

But even more important, she added, is a systems-based method to deal with insurance barriers. “If 62% of the patients did not get the medication due to insurance issues, I don’t think we’re doing a good job of making it accessible to them.”

Dr. Ogu reported a financial relationship with Vertex.

SOURCE: Ogu U et al. FSCDR 2019, Abstract JSCDH-D-19-00041.




 

AMSTERDAM – The investigational oral agent voxelotor induced rapid and sustained improvements in hemoglobin and hemolysis in both children and adults with sickle cell disease (SCD), follow-up results from the phase 3 HOPE trial show.

Neil Osterweil/MDedge News

Among 274 patients aged 12-59 years, those who were randomly assigned to receive voxelotor at a dose of 1,500 mg daily had significantly better hemoglobin responses – defined as an increase of more than 1.0 g/dL from baseline – than did patients assigned to placebo, reported Jo Howard, MD, of Guy’s and St. Thomas’ NHS Foundation Trust and King’s College in London.

“Voxelotor improves hemoglobin and reduces hemolysis in patients with sickle cell disease. This has the potential to reduce the morbidity in sickle cell disease and to improve the life of our patients,” she said at a briefing prior to her presentation of the data at the annual congress of the European Hematology Association.

There were no new safety signals and patients tolerated voxelotor well, she added.

The study was published simultaneously in the New England Journal of Medicine.

Voxelotor is a novel oral agent that increases hemoglobin’s affinity for oxygen by inhibiting hemoglobin polymerization and sickling of red blood cells, which if unchecked lead to serious consequences, such as chronic anemia and hemolysis, and subsequent organ damage, vaso-occlusion, stroke, or premature death.

In the HOPE (Hemoglobin Oxygen Affinity Modulation to Inhibit HbS Polymerization) trial, investigators enrolled 274 adolescents and adults with SCD and randomized them on a 1:1:1 basis to receive voxelotor at doses of either 1,500 mg or 900 mg daily, or placebo.

Approximately two-thirds of the patients were receiving hydroxyurea at baseline.

In a per-protocol analysis, 59.5% of patients who received the 1,500-mg dose of voxelotor had a hemoglobin response (P less than .001 compared with baseline), as did 38% of patients in the 900-mg group (P less than .001). Among patients assigned to placebo, however, just 9.2% had a hemoglobin response, a difference that was not statistically significant.

In an intention-to-treat analysis, in which patients who did not complete the study were considered to be nonresponders, the respective rates of hemoglobin response were 51.1%, 32.6%, and 6.5%.

The difference between the 1,500-mg dose and placebo was significant (P less than .001). The difference between the 900-mg group and placebo was not statistically significant.

Hemoglobin levels of 10 g/dL or higher at week 24 were seen in 41% of the participants in the 1,500-mg group, 20% in the 900-mg group, and 9% in the placebo group.

Patients on voxelotor had an improvement in hemoglobin, whether or not they were on hydroxyurea, and those with hemoglobin either below or above 7 g/dL at baseline all had an increase in hemoglobin.

The annualized adjusted incidence rate of vaso-occlusive crises was similar in the two voxelotor groups (2.77 for the 1,500-mg dose and 2.76 for the 900-mg group) – both lower than in the placebo group (3.19).

Among patients who had two or more vaso-occlusive crises within the previous year, the respective annualized incidence rates were 2.88, 3.39, and 3.50.

There was a trend toward reduced incidence of crises with voxelotor over time, Dr. Howard said.

Grade 3 or greater adverse events occurred in 26% of patients in the 1,500-mg group, 23% in the 900-mg group, and 26% in the placebo group. The most common adverse events were headache and diarrhea.

“The data presented support the achievement of the stated primary endpoint in the HOPE trial, which was to reduce anemia and hemolysis. The hemoglobin response and reduction in hemolysis observed with an orally administered, once-daily medication with side effects that minimally affect lifestyle may make voxelotor a promising advancement in the management of sickle cell disease if approved by the [Food and Drug Administration],” Alexis Thompson, MD, MPH, of Northwestern University, Chicago, noted in an editorial accompanying the study in the New England Journal of Medicine.

Global Blood Therapeutics funded the study. Dr. Howard reported consultant/advisory board activity for the company. Dr. Thompson reported grants and/or personal fees from other companies.

SOURCE: Vichinsky E et al. EHA Congress, Abstract S147. N Engl J Med. 2019 Jun 14. doi: 10.1056/NEJMoa1903212.

AMSTERDAM – The investigational oral agent voxelotor induced rapid and sustained improvements in hemoglobin and hemolysis in both children and adults with sickle cell disease (SCD), follow-up results from the phase 3 HOPE trial show.

Neil Osterweil/MDedge News

Among 274 patients aged 12-59 years, those who were randomly assigned to receive voxelotor at a dose of 1,500 mg daily had significantly better hemoglobin responses – defined as an increase of more than 1.0 g/dL from baseline – than did patients assigned to placebo, reported Jo Howard, MD, of Guy’s and St. Thomas’ NHS Foundation Trust and King’s College in London.

“Voxelotor improves hemoglobin and reduces hemolysis in patients with sickle cell disease. This has the potential to reduce the morbidity in sickle cell disease and to improve the life of our patients,” she said at a briefing prior to her presentation of the data at the annual congress of the European Hematology Association.

There were no new safety signals and patients tolerated voxelotor well, she added.

The study was published simultaneously in the New England Journal of Medicine.

Voxelotor is a novel oral agent that increases hemoglobin’s affinity for oxygen by inhibiting hemoglobin polymerization and sickling of red blood cells, which if unchecked lead to serious consequences, such as chronic anemia and hemolysis, and subsequent organ damage, vaso-occlusion, stroke, or premature death.

In the HOPE (Hemoglobin Oxygen Affinity Modulation to Inhibit HbS Polymerization) trial, investigators enrolled 274 adolescents and adults with SCD and randomized them on a 1:1:1 basis to receive voxelotor at doses of either 1,500 mg or 900 mg daily, or placebo.

Approximately two-thirds of the patients were receiving hydroxyurea at baseline.

In a per-protocol analysis, 59.5% of patients who received the 1,500-mg dose of voxelotor had a hemoglobin response (P less than .001 compared with baseline), as did 38% of patients in the 900-mg group (P less than .001). Among patients assigned to placebo, however, just 9.2% had a hemoglobin response, a difference that was not statistically significant.

In an intention-to-treat analysis, in which patients who did not complete the study were considered to be nonresponders, the respective rates of hemoglobin response were 51.1%, 32.6%, and 6.5%.

The difference between the 1,500-mg dose and placebo was significant (P less than .001). The difference between the 900-mg group and placebo was not statistically significant.

Hemoglobin levels of 10 g/dL or higher at week 24 were seen in 41% of the participants in the 1,500-mg group, 20% in the 900-mg group, and 9% in the placebo group.

Patients on voxelotor had an improvement in hemoglobin, whether or not they were on hydroxyurea, and those with hemoglobin either below or above 7 g/dL at baseline all had an increase in hemoglobin.

The annualized adjusted incidence rate of vaso-occlusive crises was similar in the two voxelotor groups (2.77 for the 1,500-mg dose and 2.76 for the 900-mg group) – both lower than in the placebo group (3.19).

Among patients who had two or more vaso-occlusive crises within the previous year, the respective annualized incidence rates were 2.88, 3.39, and 3.50.

There was a trend toward reduced incidence of crises with voxelotor over time, Dr. Howard said.

Grade 3 or greater adverse events occurred in 26% of patients in the 1,500-mg group, 23% in the 900-mg group, and 26% in the placebo group. The most common adverse events were headache and diarrhea.

“The data presented support the achievement of the stated primary endpoint in the HOPE trial, which was to reduce anemia and hemolysis. The hemoglobin response and reduction in hemolysis observed with an orally administered, once-daily medication with side effects that minimally affect lifestyle may make voxelotor a promising advancement in the management of sickle cell disease if approved by the [Food and Drug Administration],” Alexis Thompson, MD, MPH, of Northwestern University, Chicago, noted in an editorial accompanying the study in the New England Journal of Medicine.

Global Blood Therapeutics funded the study. Dr. Howard reported consultant/advisory board activity for the company. Dr. Thompson reported grants and/or personal fees from other companies.

SOURCE: Vichinsky E et al. EHA Congress, Abstract S147. N Engl J Med. 2019 Jun 14. doi: 10.1056/NEJMoa1903212.

AMSTERDAM – The investigational oral agent voxelotor induced rapid and sustained improvements in hemoglobin and hemolysis in both children and adults with sickle cell disease (SCD), follow-up results from the phase 3 HOPE trial show.

Neil Osterweil/MDedge News

Among 274 patients aged 12-59 years, those who were randomly assigned to receive voxelotor at a dose of 1,500 mg daily had significantly better hemoglobin responses – defined as an increase of more than 1.0 g/dL from baseline – than did patients assigned to placebo, reported Jo Howard, MD, of Guy’s and St. Thomas’ NHS Foundation Trust and King’s College in London.

“Voxelotor improves hemoglobin and reduces hemolysis in patients with sickle cell disease. This has the potential to reduce the morbidity in sickle cell disease and to improve the life of our patients,” she said at a briefing prior to her presentation of the data at the annual congress of the European Hematology Association.

There were no new safety signals and patients tolerated voxelotor well, she added.

The study was published simultaneously in the New England Journal of Medicine.

Voxelotor is a novel oral agent that increases hemoglobin’s affinity for oxygen by inhibiting hemoglobin polymerization and sickling of red blood cells, which if unchecked lead to serious consequences, such as chronic anemia and hemolysis, and subsequent organ damage, vaso-occlusion, stroke, or premature death.

In the HOPE (Hemoglobin Oxygen Affinity Modulation to Inhibit HbS Polymerization) trial, investigators enrolled 274 adolescents and adults with SCD and randomized them on a 1:1:1 basis to receive voxelotor at doses of either 1,500 mg or 900 mg daily, or placebo.

Approximately two-thirds of the patients were receiving hydroxyurea at baseline.

In a per-protocol analysis, 59.5% of patients who received the 1,500-mg dose of voxelotor had a hemoglobin response (P less than .001 compared with baseline), as did 38% of patients in the 900-mg group (P less than .001). Among patients assigned to placebo, however, just 9.2% had a hemoglobin response, a difference that was not statistically significant.

In an intention-to-treat analysis, in which patients who did not complete the study were considered to be nonresponders, the respective rates of hemoglobin response were 51.1%, 32.6%, and 6.5%.

The difference between the 1,500-mg dose and placebo was significant (P less than .001). The difference between the 900-mg group and placebo was not statistically significant.

Hemoglobin levels of 10 g/dL or higher at week 24 were seen in 41% of the participants in the 1,500-mg group, 20% in the 900-mg group, and 9% in the placebo group.

Patients on voxelotor had an improvement in hemoglobin, whether or not they were on hydroxyurea, and those with hemoglobin either below or above 7 g/dL at baseline all had an increase in hemoglobin.

The annualized adjusted incidence rate of vaso-occlusive crises was similar in the two voxelotor groups (2.77 for the 1,500-mg dose and 2.76 for the 900-mg group) – both lower than in the placebo group (3.19).

Among patients who had two or more vaso-occlusive crises within the previous year, the respective annualized incidence rates were 2.88, 3.39, and 3.50.

There was a trend toward reduced incidence of crises with voxelotor over time, Dr. Howard said.

Grade 3 or greater adverse events occurred in 26% of patients in the 1,500-mg group, 23% in the 900-mg group, and 26% in the placebo group. The most common adverse events were headache and diarrhea.

“The data presented support the achievement of the stated primary endpoint in the HOPE trial, which was to reduce anemia and hemolysis. The hemoglobin response and reduction in hemolysis observed with an orally administered, once-daily medication with side effects that minimally affect lifestyle may make voxelotor a promising advancement in the management of sickle cell disease if approved by the [Food and Drug Administration],” Alexis Thompson, MD, MPH, of Northwestern University, Chicago, noted in an editorial accompanying the study in the New England Journal of Medicine.

Global Blood Therapeutics funded the study. Dr. Howard reported consultant/advisory board activity for the company. Dr. Thompson reported grants and/or personal fees from other companies.

SOURCE: Vichinsky E et al. EHA Congress, Abstract S147. N Engl J Med. 2019 Jun 14. doi: 10.1056/NEJMoa1903212.

Cancer survivors have significantly higher out-of-pocket medical costs than those with no history of cancer, and a quarter of those survivors have some type of material hardship related to their diagnosis, according to the Centers for Disease Control and Prevention.

Along with those material financial hardships – the need to borrow money, go into debt, or declare bankruptcy – more than 34% of cancer survivors aged 18-64 years experienced psychological financial hardship, defined as worry about large medical bills, in 2011 and 2016, Donatus U. Ekwueme, PhD, and his associates reported in the Morbidity and Mortality Weekly Report.

Cancer survivors spend 60% more out of pocket than those with no cancer history: $1,000 a year from 2011 to 2016, compared with $622 for adults without a history of cancer. Spending was lowest among younger people (18-39 years) and increased with age, but the prevalence of both material and psychological hardships was highest in the middle age group (40-49 years) and lowest in the oldest group (50-64 years), they said.

Women had higher out-of-pocket costs than men, although the difference was smaller for those with cancer ($1,023 vs. $976) than for those without ($721 vs. $519). Material and psychological hardships were both more common among women, said Dr. Ekwueme of the CDC’s National Center for Chronic Disease Prevention and Health Promotion, Atlanta, and his associates.

Mean out-of-pocket spending was much higher for cancer survivors with private health insurance ($1,114) than for survivors with public insurance ($471), but material hardship was much more prevalent among those with public insurance (33.1% vs. 21.9%). Rates of psychological hardship, however, were much closer: 35.9% for those with public insurance and 32.5% for those with private insurance, the investigators said.

“The number of Americans with a history of cancer is projected to increase in the next decade, and the economic burden associated with living with a cancer diagnosis will likely increase as well,” they wrote, and interventions such as “systematic screening for financial hardship at cancer diagnosis and throughout the cancer care trajectory [are needed] to minimize financial hardship for cancer survivors.”

The analysis was based on data for 123,771 adults aged 18-64 years from the Medical Expenditure Panel Survey. Out-of-pocket costs were calculated using data from 2011 to 2016, with all costs adjusted to 2016 dollars, but the hardship calculations involved data from only 2011 and 2016.

rfranki@mdedge.com

SOURCE: Ekwueme DU et al. MMWR 2019 Jun 7;68(22):494-9.

Cancer survivors have significantly higher out-of-pocket medical costs than those with no history of cancer, and a quarter of those survivors have some type of material hardship related to their diagnosis, according to the Centers for Disease Control and Prevention.

Along with those material financial hardships – the need to borrow money, go into debt, or declare bankruptcy – more than 34% of cancer survivors aged 18-64 years experienced psychological financial hardship, defined as worry about large medical bills, in 2011 and 2016, Donatus U. Ekwueme, PhD, and his associates reported in the Morbidity and Mortality Weekly Report.

Cancer survivors spend 60% more out of pocket than those with no cancer history: $1,000 a year from 2011 to 2016, compared with $622 for adults without a history of cancer. Spending was lowest among younger people (18-39 years) and increased with age, but the prevalence of both material and psychological hardships was highest in the middle age group (40-49 years) and lowest in the oldest group (50-64 years), they said.

Women had higher out-of-pocket costs than men, although the difference was smaller for those with cancer ($1,023 vs. $976) than for those without ($721 vs. $519). Material and psychological hardships were both more common among women, said Dr. Ekwueme of the CDC’s National Center for Chronic Disease Prevention and Health Promotion, Atlanta, and his associates.

Mean out-of-pocket spending was much higher for cancer survivors with private health insurance ($1,114) than for survivors with public insurance ($471), but material hardship was much more prevalent among those with public insurance (33.1% vs. 21.9%). Rates of psychological hardship, however, were much closer: 35.9% for those with public insurance and 32.5% for those with private insurance, the investigators said.

“The number of Americans with a history of cancer is projected to increase in the next decade, and the economic burden associated with living with a cancer diagnosis will likely increase as well,” they wrote, and interventions such as “systematic screening for financial hardship at cancer diagnosis and throughout the cancer care trajectory [are needed] to minimize financial hardship for cancer survivors.”

The analysis was based on data for 123,771 adults aged 18-64 years from the Medical Expenditure Panel Survey. Out-of-pocket costs were calculated using data from 2011 to 2016, with all costs adjusted to 2016 dollars, but the hardship calculations involved data from only 2011 and 2016.

rfranki@mdedge.com

SOURCE: Ekwueme DU et al. MMWR 2019 Jun 7;68(22):494-9.

Cancer survivors have significantly higher out-of-pocket medical costs than those with no history of cancer, and a quarter of those survivors have some type of material hardship related to their diagnosis, according to the Centers for Disease Control and Prevention.

Along with those material financial hardships – the need to borrow money, go into debt, or declare bankruptcy – more than 34% of cancer survivors aged 18-64 years experienced psychological financial hardship, defined as worry about large medical bills, in 2011 and 2016, Donatus U. Ekwueme, PhD, and his associates reported in the Morbidity and Mortality Weekly Report.

Cancer survivors spend 60% more out of pocket than those with no cancer history: $1,000 a year from 2011 to 2016, compared with $622 for adults without a history of cancer. Spending was lowest among younger people (18-39 years) and increased with age, but the prevalence of both material and psychological hardships was highest in the middle age group (40-49 years) and lowest in the oldest group (50-64 years), they said.

Women had higher out-of-pocket costs than men, although the difference was smaller for those with cancer ($1,023 vs. $976) than for those without ($721 vs. $519). Material and psychological hardships were both more common among women, said Dr. Ekwueme of the CDC’s National Center for Chronic Disease Prevention and Health Promotion, Atlanta, and his associates.

Mean out-of-pocket spending was much higher for cancer survivors with private health insurance ($1,114) than for survivors with public insurance ($471), but material hardship was much more prevalent among those with public insurance (33.1% vs. 21.9%). Rates of psychological hardship, however, were much closer: 35.9% for those with public insurance and 32.5% for those with private insurance, the investigators said.

“The number of Americans with a history of cancer is projected to increase in the next decade, and the economic burden associated with living with a cancer diagnosis will likely increase as well,” they wrote, and interventions such as “systematic screening for financial hardship at cancer diagnosis and throughout the cancer care trajectory [are needed] to minimize financial hardship for cancer survivors.”

The analysis was based on data for 123,771 adults aged 18-64 years from the Medical Expenditure Panel Survey. Out-of-pocket costs were calculated using data from 2011 to 2016, with all costs adjusted to 2016 dollars, but the hardship calculations involved data from only 2011 and 2016.

rfranki@mdedge.com

SOURCE: Ekwueme DU et al. MMWR 2019 Jun 7;68(22):494-9.

CHICAGO – A fixed-duration venetoclax-obinutuzumab regimen is safe and provides a superior outcome versus standard chlorambucil-obinutuzumab in elderly patients with untreated chronic lymphocytic leukemia (CLL) and comorbidities, results of a randomized phase 3 trial showed.

At 24 months, progression-free survival was 88.2% for the venetoclax-obinutuzumab regimen, versus 64.1% for chlorambucil-obinutuzumab (hazard ratio, 0.35; 95% confidence interval, 0.23-0.53; P less than .0001) in CLL-14, an open-label, multinational trial presented at the annual meeting of the American Society of Clinical Oncology.

The regimen, given for just 12 28-day cycles, also achieved the highest rate of minimal residual disease (MRD)-negative responses ever seen in a randomized prospective CLL study, according to investigator Kirsten Fischer, MD, of the University of Cologne in Germany.

“We really think that these unprecedented MRD negativity levels will eventually translate into an improved overall survival,” Dr. Fischer said during an oral abstract presentation.

Matthew Steven Davids, MD, of Dana-Farber Cancer Institute/Harvard Medical School, Boston, said venetoclax plus obinutuzumab offers the potential for 1-year, time-limited therapy, which limits concerns over long-term adherence and has the potential for cost savings, should the therapy prove to be highly durable with further follow-up.

“A limitation of the study is that the comparator arm – chlorambucil plus obinutuzumab – is directly applicable to only a relatively small subset of our older and frailer CLL patients,” Dr. Davids said during a podium discussion of the results.

“But nonetheless, venetoclax plus obinutuzumab is a promising, time-limited regimen, and CLL14 is an immediately practice-changing study for frontline CLL treatment,” he added.

The regimen stands in contrast to ibrutinib, which offers durable responses but requires continuous dosing, and FCR (fludarabine, cyclophosphamide, and rituximab), a time-limited therapy with curative potential that is restricted to younger patients with IGHV-mutated CLL, according to Dr. Davids.

In CLL-14, 432 patients were randomized 1:1 to receive venetoclax-obinutuzumab for six cycles followed by venetoclax for six cycles, or chlorambucil-obinutuzumab for six cycles followed by chlorambucil for six cycles. The median age was 72 years in the venetoclax-obinutuzumab arm and 71 years in the chlorambucil-obinutuzumab arm.

The overall response rate was 85% for venetoclax-obinutuzumab and 71% for chlorambucil-obinutuzumab (P = .0007), Dr. Fischer reported at the meeting.

The improvement in progression-free survival seen in the overall study population was also seen in patients with TP53 deletions or mutations, and in those with unmutated IGHV, Dr. Fischer reported.

Rates of MRD negativity in peripheral blood were 76% versus 35% for the venetoclax- and chlorambucil-containing combinations, respectively (P less than .001), and similarly, MRD negativity in bone marrow was 57% versus 17% (P less than .001), she said.

There were no significant differences in the rates of grade 3 or 4 neutropenia, which occurred in 52.8% of the venetoclax–obinutuzumab treated patients and 48.1% of the chlorambucil-obinutuzumab treated patients, or in grade 3 or 4 infections, which occurred in 17.5% and 15.0%, respectively, according to a report, published simultaneously in the New England Journal of Medicine (2019;380:2225-36).

Likewise, all-cause mortality was not significantly different between the arms, at 9.3% and 7.9%, respectively.

F. Hoffmann-La Roche and AbbVie supported the study. Dr. Fischer reported travel, accommodations, or expenses from Roche in her abstract disclosure.

SOURCE: Fischer K et al. ASCO 2019, Abstract 7502.

CHICAGO – A fixed-duration venetoclax-obinutuzumab regimen is safe and provides a superior outcome versus standard chlorambucil-obinutuzumab in elderly patients with untreated chronic lymphocytic leukemia (CLL) and comorbidities, results of a randomized phase 3 trial showed.

At 24 months, progression-free survival was 88.2% for the venetoclax-obinutuzumab regimen, versus 64.1% for chlorambucil-obinutuzumab (hazard ratio, 0.35; 95% confidence interval, 0.23-0.53; P less than .0001) in CLL-14, an open-label, multinational trial presented at the annual meeting of the American Society of Clinical Oncology.

The regimen, given for just 12 28-day cycles, also achieved the highest rate of minimal residual disease (MRD)-negative responses ever seen in a randomized prospective CLL study, according to investigator Kirsten Fischer, MD, of the University of Cologne in Germany.

“We really think that these unprecedented MRD negativity levels will eventually translate into an improved overall survival,” Dr. Fischer said during an oral abstract presentation.

Matthew Steven Davids, MD, of Dana-Farber Cancer Institute/Harvard Medical School, Boston, said venetoclax plus obinutuzumab offers the potential for 1-year, time-limited therapy, which limits concerns over long-term adherence and has the potential for cost savings, should the therapy prove to be highly durable with further follow-up.

“A limitation of the study is that the comparator arm – chlorambucil plus obinutuzumab – is directly applicable to only a relatively small subset of our older and frailer CLL patients,” Dr. Davids said during a podium discussion of the results.

“But nonetheless, venetoclax plus obinutuzumab is a promising, time-limited regimen, and CLL14 is an immediately practice-changing study for frontline CLL treatment,” he added.

The regimen stands in contrast to ibrutinib, which offers durable responses but requires continuous dosing, and FCR (fludarabine, cyclophosphamide, and rituximab), a time-limited therapy with curative potential that is restricted to younger patients with IGHV-mutated CLL, according to Dr. Davids.

In CLL-14, 432 patients were randomized 1:1 to receive venetoclax-obinutuzumab for six cycles followed by venetoclax for six cycles, or chlorambucil-obinutuzumab for six cycles followed by chlorambucil for six cycles. The median age was 72 years in the venetoclax-obinutuzumab arm and 71 years in the chlorambucil-obinutuzumab arm.

The overall response rate was 85% for venetoclax-obinutuzumab and 71% for chlorambucil-obinutuzumab (P = .0007), Dr. Fischer reported at the meeting.

The improvement in progression-free survival seen in the overall study population was also seen in patients with TP53 deletions or mutations, and in those with unmutated IGHV, Dr. Fischer reported.

Rates of MRD negativity in peripheral blood were 76% versus 35% for the venetoclax- and chlorambucil-containing combinations, respectively (P less than .001), and similarly, MRD negativity in bone marrow was 57% versus 17% (P less than .001), she said.

There were no significant differences in the rates of grade 3 or 4 neutropenia, which occurred in 52.8% of the venetoclax–obinutuzumab treated patients and 48.1% of the chlorambucil-obinutuzumab treated patients, or in grade 3 or 4 infections, which occurred in 17.5% and 15.0%, respectively, according to a report, published simultaneously in the New England Journal of Medicine (2019;380:2225-36).

Likewise, all-cause mortality was not significantly different between the arms, at 9.3% and 7.9%, respectively.

F. Hoffmann-La Roche and AbbVie supported the study. Dr. Fischer reported travel, accommodations, or expenses from Roche in her abstract disclosure.

SOURCE: Fischer K et al. ASCO 2019, Abstract 7502.

CHICAGO – A fixed-duration venetoclax-obinutuzumab regimen is safe and provides a superior outcome versus standard chlorambucil-obinutuzumab in elderly patients with untreated chronic lymphocytic leukemia (CLL) and comorbidities, results of a randomized phase 3 trial showed.

At 24 months, progression-free survival was 88.2% for the venetoclax-obinutuzumab regimen, versus 64.1% for chlorambucil-obinutuzumab (hazard ratio, 0.35; 95% confidence interval, 0.23-0.53; P less than .0001) in CLL-14, an open-label, multinational trial presented at the annual meeting of the American Society of Clinical Oncology.

The regimen, given for just 12 28-day cycles, also achieved the highest rate of minimal residual disease (MRD)-negative responses ever seen in a randomized prospective CLL study, according to investigator Kirsten Fischer, MD, of the University of Cologne in Germany.

“We really think that these unprecedented MRD negativity levels will eventually translate into an improved overall survival,” Dr. Fischer said during an oral abstract presentation.

Matthew Steven Davids, MD, of Dana-Farber Cancer Institute/Harvard Medical School, Boston, said venetoclax plus obinutuzumab offers the potential for 1-year, time-limited therapy, which limits concerns over long-term adherence and has the potential for cost savings, should the therapy prove to be highly durable with further follow-up.

“A limitation of the study is that the comparator arm – chlorambucil plus obinutuzumab – is directly applicable to only a relatively small subset of our older and frailer CLL patients,” Dr. Davids said during a podium discussion of the results.

“But nonetheless, venetoclax plus obinutuzumab is a promising, time-limited regimen, and CLL14 is an immediately practice-changing study for frontline CLL treatment,” he added.

The regimen stands in contrast to ibrutinib, which offers durable responses but requires continuous dosing, and FCR (fludarabine, cyclophosphamide, and rituximab), a time-limited therapy with curative potential that is restricted to younger patients with IGHV-mutated CLL, according to Dr. Davids.

In CLL-14, 432 patients were randomized 1:1 to receive venetoclax-obinutuzumab for six cycles followed by venetoclax for six cycles, or chlorambucil-obinutuzumab for six cycles followed by chlorambucil for six cycles. The median age was 72 years in the venetoclax-obinutuzumab arm and 71 years in the chlorambucil-obinutuzumab arm.

The overall response rate was 85% for venetoclax-obinutuzumab and 71% for chlorambucil-obinutuzumab (P = .0007), Dr. Fischer reported at the meeting.

The improvement in progression-free survival seen in the overall study population was also seen in patients with TP53 deletions or mutations, and in those with unmutated IGHV, Dr. Fischer reported.

Rates of MRD negativity in peripheral blood were 76% versus 35% for the venetoclax- and chlorambucil-containing combinations, respectively (P less than .001), and similarly, MRD negativity in bone marrow was 57% versus 17% (P less than .001), she said.

There were no significant differences in the rates of grade 3 or 4 neutropenia, which occurred in 52.8% of the venetoclax–obinutuzumab treated patients and 48.1% of the chlorambucil-obinutuzumab treated patients, or in grade 3 or 4 infections, which occurred in 17.5% and 15.0%, respectively, according to a report, published simultaneously in the New England Journal of Medicine (2019;380:2225-36).

Likewise, all-cause mortality was not significantly different between the arms, at 9.3% and 7.9%, respectively.

F. Hoffmann-La Roche and AbbVie supported the study. Dr. Fischer reported travel, accommodations, or expenses from Roche in her abstract disclosure.

SOURCE: Fischer K et al. ASCO 2019, Abstract 7502.