AVAHO

Children born near fracking and other “unconventional” drilling sites are at two to three times greater risk of developing childhood leukemia, according to new research.

The study, published in the journal Environmental Health Perspectives, compared proximity of homes to unconventional oil and gas development (UOGD) sites and risk of the most common form of childhood leukemia, acute lymphoblastic leukemia (ALL).

Researchers looked at 405 children aged 2-7 diagnosed with ALL in Pennsylvania from 2009 to 2017. These children were compared to a control group of 2,080 without the disease matched on the year of birth.

“Unconventional oil and gas development can both use and release chemicals that have been linked to cancer,” study coauthor Nicole Deziel, PhD, of the Yale School of Public Health, New Haven, Conn., said in a  statement . She noted that the possibility that children living in close proximity to such sites are “exposed to these chemical carcinogens is a major public health concern.”

About 17 million Americans live within a half-mile of active oil and gas production, according to the Oil & Gas Threat Map, Common Dreams reports. That number includes 4 million children.

The Yale study also found that drinking water could be an important pathway of exposure to oil- and gas-related chemicals used in the UOGD methods of extraction.

Researchers used a new metric that measures exposure to contaminated drinking water and distance to a well. They were able to identify UOGD-affected wells that fell within watersheds where children and their families likely obtained their water.

“Previous health studies have found links between proximity to oil and gas drilling and various children’s health outcomes,” said Dr. Deziel. “This study is among the few to focus on drinking water specifically and the first to apply a novel metric designed to capture potential exposure through this pathway.”

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

Children born near fracking and other “unconventional” drilling sites are at two to three times greater risk of developing childhood leukemia, according to new research.

The study, published in the journal Environmental Health Perspectives, compared proximity of homes to unconventional oil and gas development (UOGD) sites and risk of the most common form of childhood leukemia, acute lymphoblastic leukemia (ALL).

Researchers looked at 405 children aged 2-7 diagnosed with ALL in Pennsylvania from 2009 to 2017. These children were compared to a control group of 2,080 without the disease matched on the year of birth.

“Unconventional oil and gas development can both use and release chemicals that have been linked to cancer,” study coauthor Nicole Deziel, PhD, of the Yale School of Public Health, New Haven, Conn., said in a  statement . She noted that the possibility that children living in close proximity to such sites are “exposed to these chemical carcinogens is a major public health concern.”

About 17 million Americans live within a half-mile of active oil and gas production, according to the Oil & Gas Threat Map, Common Dreams reports. That number includes 4 million children.

The Yale study also found that drinking water could be an important pathway of exposure to oil- and gas-related chemicals used in the UOGD methods of extraction.

Researchers used a new metric that measures exposure to contaminated drinking water and distance to a well. They were able to identify UOGD-affected wells that fell within watersheds where children and their families likely obtained their water.

“Previous health studies have found links between proximity to oil and gas drilling and various children’s health outcomes,” said Dr. Deziel. “This study is among the few to focus on drinking water specifically and the first to apply a novel metric designed to capture potential exposure through this pathway.”

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

Children born near fracking and other “unconventional” drilling sites are at two to three times greater risk of developing childhood leukemia, according to new research.

The study, published in the journal Environmental Health Perspectives, compared proximity of homes to unconventional oil and gas development (UOGD) sites and risk of the most common form of childhood leukemia, acute lymphoblastic leukemia (ALL).

Researchers looked at 405 children aged 2-7 diagnosed with ALL in Pennsylvania from 2009 to 2017. These children were compared to a control group of 2,080 without the disease matched on the year of birth.

“Unconventional oil and gas development can both use and release chemicals that have been linked to cancer,” study coauthor Nicole Deziel, PhD, of the Yale School of Public Health, New Haven, Conn., said in a  statement . She noted that the possibility that children living in close proximity to such sites are “exposed to these chemical carcinogens is a major public health concern.”

About 17 million Americans live within a half-mile of active oil and gas production, according to the Oil & Gas Threat Map, Common Dreams reports. That number includes 4 million children.

The Yale study also found that drinking water could be an important pathway of exposure to oil- and gas-related chemicals used in the UOGD methods of extraction.

Researchers used a new metric that measures exposure to contaminated drinking water and distance to a well. They were able to identify UOGD-affected wells that fell within watersheds where children and their families likely obtained their water.

“Previous health studies have found links between proximity to oil and gas drilling and various children’s health outcomes,” said Dr. Deziel. “This study is among the few to focus on drinking water specifically and the first to apply a novel metric designed to capture potential exposure through this pathway.”

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

Lung disease as an adverse effect of the targeted cancer drug trastuzumab deruxtecan (T-DXd, Enhertu) is not negligible, although the benefit-to-risk relationship with use of the drug is still positive, say researchers who report a review of early clinical trials with the drug.

T-DXd is a monoclonal antibody that targets HER2. It is approved for use in HER2-positive breast, gastric, and lung cancers.

In the new study, investigators analyzed data from early clinical trials that involved patients with advanced cancers who had been heavily pretreated. They found an incidence of just over 15% for interstitial lung disease (ILD)/pneumonitis associated with the drug. Most patients (77.4%) had grade 1 or 2 ILD, but 2.2% of patients had grade 5 ILD.

“Interstitial lung disease is a known risk factor in patients treated with antibody conjugates for cancer,” commented lead author Charles Powell, MD, Icahn School of Medicine at Mount Sinai, New York. This adverse effect can lead to lung fibrosis and can become severe, life threatening, and even fatal, the authors warned.

The authors also discussed management of the event, which involves corticosteroids, and recommended that any patient who develops ILD of grade 3 or higher be hospitalized.

Close monitoring and proactive management may reduce the risk of ILD, they suggested.

Indeed, the incidence of this adverse effect was lower in a later phase 3 trial of the drug (10.5% in the DESTINY-Breast03 trial) and that the adverse events were less severe in this patient population (none of these events were of grade 4 or 5).

“Increased knowledge ... and implementation of ILD/pneumonitis monitoring, diagnosis, and management guidelines” may have resulted in this adverse effect being identified early and treated before it progressed, they commented.

ILD is highlighted in a boxed warning on the product label.

The study was published online in ESMO Open.

In their review, the investigators evaluated nine early-stage monotherapy clinical trials (phases 1 and 2) involving a total of 1,150 patients (breast cancer, 44.3%; gastric cancer, 25.6%; lung cancer, 17.7%; colorectal cancer, 9.3%, other cancers, 3.0%).

These patients had advanced cancer and had been heavily pretreated with a median of four prior lines of therapy. They received one or more doses of at least 5.4 mg/kg of T-DXd.

Nearly half of the cohort were treated for more than 6 months. A total of 276 potential ILD/pneumonitis events were sent for adjudication; of those, 85% were adjudicated as ILD/pneumonitis.

The overall incidence of adjudicated ILD/pneumonitis events was 15.4%; most were low-grade events. Some 87% of patients experienced their first ILD event within 12 months of treatment. The median time to experiencing an ILD/pneumonitis event was 5.4 months.

Some of the patients who developed grade 1 ILD/pneumonitis were treated and the adverse event resolved. These patients were then rechallenged with the drug. Only 3 of the 47 rechallenged patients experienced recurrence of ILD/pneumonitis, the authors noted.

“Rechallenge with T-DXd after complete resolution of grade 1 events is possible and warrants further investigation,” they commented. They cautioned, however, that rechallenge is not recommended for all patients, at least not for those with grade 2 or higher ILD/pneumonitis.

Overall, the authors concluded that the “benefit-risk of T-DXd treatment is positive,” but they warned that some patients may be at increased risk of developing ILD/pneumonitis

Baseline factors that increase the risk of developing an ILD/pneumonitis event include the following: being younger than 65 years, receiving a T-DXd dose of more than6.4 mg/kg, having a baseline oxygen saturation level of less than 95%, having moderate to severe renal impairment, and having lung comorbidities. In addition, patients who had initially been diagnosed with cancer more than 4 years before receiving the drug were at higher risk of developing ILD/pneumonitis.

“Using learnings from the early clinical trials experience, physician education and patient management protocols were revised and disseminated by the study sponsors [and] more recent trial data in earlier lines of therapy has demonstrated lower rates of ILD events, suggesting close monitoring and proactive management of ILD/pneumonitis is warranted for all patients,” Dr. Powell said in a statement.

The T-DXd clinical trials were sponsored by AstraZeneca and Daiichi Sankyo. Dr. Powell has received fees from Daiichi Sankyo, AstraZeneca, and Voluntis.

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

Lung disease as an adverse effect of the targeted cancer drug trastuzumab deruxtecan (T-DXd, Enhertu) is not negligible, although the benefit-to-risk relationship with use of the drug is still positive, say researchers who report a review of early clinical trials with the drug.

T-DXd is a monoclonal antibody that targets HER2. It is approved for use in HER2-positive breast, gastric, and lung cancers.

In the new study, investigators analyzed data from early clinical trials that involved patients with advanced cancers who had been heavily pretreated. They found an incidence of just over 15% for interstitial lung disease (ILD)/pneumonitis associated with the drug. Most patients (77.4%) had grade 1 or 2 ILD, but 2.2% of patients had grade 5 ILD.

“Interstitial lung disease is a known risk factor in patients treated with antibody conjugates for cancer,” commented lead author Charles Powell, MD, Icahn School of Medicine at Mount Sinai, New York. This adverse effect can lead to lung fibrosis and can become severe, life threatening, and even fatal, the authors warned.

The authors also discussed management of the event, which involves corticosteroids, and recommended that any patient who develops ILD of grade 3 or higher be hospitalized.

Close monitoring and proactive management may reduce the risk of ILD, they suggested.

Indeed, the incidence of this adverse effect was lower in a later phase 3 trial of the drug (10.5% in the DESTINY-Breast03 trial) and that the adverse events were less severe in this patient population (none of these events were of grade 4 or 5).

“Increased knowledge ... and implementation of ILD/pneumonitis monitoring, diagnosis, and management guidelines” may have resulted in this adverse effect being identified early and treated before it progressed, they commented.

ILD is highlighted in a boxed warning on the product label.

The study was published online in ESMO Open.

In their review, the investigators evaluated nine early-stage monotherapy clinical trials (phases 1 and 2) involving a total of 1,150 patients (breast cancer, 44.3%; gastric cancer, 25.6%; lung cancer, 17.7%; colorectal cancer, 9.3%, other cancers, 3.0%).

These patients had advanced cancer and had been heavily pretreated with a median of four prior lines of therapy. They received one or more doses of at least 5.4 mg/kg of T-DXd.

Nearly half of the cohort were treated for more than 6 months. A total of 276 potential ILD/pneumonitis events were sent for adjudication; of those, 85% were adjudicated as ILD/pneumonitis.

The overall incidence of adjudicated ILD/pneumonitis events was 15.4%; most were low-grade events. Some 87% of patients experienced their first ILD event within 12 months of treatment. The median time to experiencing an ILD/pneumonitis event was 5.4 months.

Some of the patients who developed grade 1 ILD/pneumonitis were treated and the adverse event resolved. These patients were then rechallenged with the drug. Only 3 of the 47 rechallenged patients experienced recurrence of ILD/pneumonitis, the authors noted.

“Rechallenge with T-DXd after complete resolution of grade 1 events is possible and warrants further investigation,” they commented. They cautioned, however, that rechallenge is not recommended for all patients, at least not for those with grade 2 or higher ILD/pneumonitis.

Overall, the authors concluded that the “benefit-risk of T-DXd treatment is positive,” but they warned that some patients may be at increased risk of developing ILD/pneumonitis

Baseline factors that increase the risk of developing an ILD/pneumonitis event include the following: being younger than 65 years, receiving a T-DXd dose of more than6.4 mg/kg, having a baseline oxygen saturation level of less than 95%, having moderate to severe renal impairment, and having lung comorbidities. In addition, patients who had initially been diagnosed with cancer more than 4 years before receiving the drug were at higher risk of developing ILD/pneumonitis.

“Using learnings from the early clinical trials experience, physician education and patient management protocols were revised and disseminated by the study sponsors [and] more recent trial data in earlier lines of therapy has demonstrated lower rates of ILD events, suggesting close monitoring and proactive management of ILD/pneumonitis is warranted for all patients,” Dr. Powell said in a statement.

The T-DXd clinical trials were sponsored by AstraZeneca and Daiichi Sankyo. Dr. Powell has received fees from Daiichi Sankyo, AstraZeneca, and Voluntis.

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

Lung disease as an adverse effect of the targeted cancer drug trastuzumab deruxtecan (T-DXd, Enhertu) is not negligible, although the benefit-to-risk relationship with use of the drug is still positive, say researchers who report a review of early clinical trials with the drug.

T-DXd is a monoclonal antibody that targets HER2. It is approved for use in HER2-positive breast, gastric, and lung cancers.

In the new study, investigators analyzed data from early clinical trials that involved patients with advanced cancers who had been heavily pretreated. They found an incidence of just over 15% for interstitial lung disease (ILD)/pneumonitis associated with the drug. Most patients (77.4%) had grade 1 or 2 ILD, but 2.2% of patients had grade 5 ILD.

“Interstitial lung disease is a known risk factor in patients treated with antibody conjugates for cancer,” commented lead author Charles Powell, MD, Icahn School of Medicine at Mount Sinai, New York. This adverse effect can lead to lung fibrosis and can become severe, life threatening, and even fatal, the authors warned.

The authors also discussed management of the event, which involves corticosteroids, and recommended that any patient who develops ILD of grade 3 or higher be hospitalized.

Close monitoring and proactive management may reduce the risk of ILD, they suggested.

Indeed, the incidence of this adverse effect was lower in a later phase 3 trial of the drug (10.5% in the DESTINY-Breast03 trial) and that the adverse events were less severe in this patient population (none of these events were of grade 4 or 5).

“Increased knowledge ... and implementation of ILD/pneumonitis monitoring, diagnosis, and management guidelines” may have resulted in this adverse effect being identified early and treated before it progressed, they commented.

ILD is highlighted in a boxed warning on the product label.

The study was published online in ESMO Open.

In their review, the investigators evaluated nine early-stage monotherapy clinical trials (phases 1 and 2) involving a total of 1,150 patients (breast cancer, 44.3%; gastric cancer, 25.6%; lung cancer, 17.7%; colorectal cancer, 9.3%, other cancers, 3.0%).

These patients had advanced cancer and had been heavily pretreated with a median of four prior lines of therapy. They received one or more doses of at least 5.4 mg/kg of T-DXd.

Nearly half of the cohort were treated for more than 6 months. A total of 276 potential ILD/pneumonitis events were sent for adjudication; of those, 85% were adjudicated as ILD/pneumonitis.

The overall incidence of adjudicated ILD/pneumonitis events was 15.4%; most were low-grade events. Some 87% of patients experienced their first ILD event within 12 months of treatment. The median time to experiencing an ILD/pneumonitis event was 5.4 months.

Some of the patients who developed grade 1 ILD/pneumonitis were treated and the adverse event resolved. These patients were then rechallenged with the drug. Only 3 of the 47 rechallenged patients experienced recurrence of ILD/pneumonitis, the authors noted.

“Rechallenge with T-DXd after complete resolution of grade 1 events is possible and warrants further investigation,” they commented. They cautioned, however, that rechallenge is not recommended for all patients, at least not for those with grade 2 or higher ILD/pneumonitis.

Overall, the authors concluded that the “benefit-risk of T-DXd treatment is positive,” but they warned that some patients may be at increased risk of developing ILD/pneumonitis

Baseline factors that increase the risk of developing an ILD/pneumonitis event include the following: being younger than 65 years, receiving a T-DXd dose of more than6.4 mg/kg, having a baseline oxygen saturation level of less than 95%, having moderate to severe renal impairment, and having lung comorbidities. In addition, patients who had initially been diagnosed with cancer more than 4 years before receiving the drug were at higher risk of developing ILD/pneumonitis.

“Using learnings from the early clinical trials experience, physician education and patient management protocols were revised and disseminated by the study sponsors [and] more recent trial data in earlier lines of therapy has demonstrated lower rates of ILD events, suggesting close monitoring and proactive management of ILD/pneumonitis is warranted for all patients,” Dr. Powell said in a statement.

The T-DXd clinical trials were sponsored by AstraZeneca and Daiichi Sankyo. Dr. Powell has received fees from Daiichi Sankyo, AstraZeneca, and Voluntis.

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

The field of radiation oncology has rapidly evolved in recent years, thanks in large part to findings from randomized clinical trials (RCTs) that have helped shift therapeutic standards, a review of the literature shows.

The authors assessed all RCTs involving radiotherapy from 2018 to 2021, with the goal of identifying the latest practice-changing data, emerging concepts, and areas that require further study.

Highlights from this research reveal how high-tech radiotherapy, such as hypofractionation and stereotactic body radiotherapy, has improved care for many patients, how personalized radiotherapy using image-based guidance has helped tailor treatments, and how endpoints that focus on quality of life and patient satisfaction are emerging.

For instance, Charles B. Simone II, MD, FACRO, who was not involved in the current work, pointed to “a proliferation of trials assessing hypofractionation in the curative setting and stereotactic body radiation therapy in the curative and poly- and oligometastatic settings that have allowed for increased patient convenience and dose intensification, respectively.”

Dr. Simone, chief medical officer, New York Proton Center, Memorial Sloan Kettering Cancer Center, also noted that the first personalized radiotherapy trials using imaging and biological markers have “the profound potential to individualize treatment and improve patient outcomes.”

The review was published in the European Journal of Cancer.
 

An evolving field

Given the fast-changing landscape for cancer therapeutics and a deluge of research studies, the authors wanted to understand the most notable advances established in recent trials as well as caveats to some approaches and emerging areas to watch.

In the review, Sophie Espenel, MD, from the department of radiation oncology, Gustave Roussy Cancer Campus, Villejuif, France, and colleagues identified 1,347 radiotherapy RCTs that were conducted from January 2018 to December 2021. Of these, the authors selected 110 large phase 2 or 3 RCTs that contained data showing practice-changing or emerging concepts.

Overall, the studies showed “great dynamism” in radiation oncology research and covered a wide range of radiotherapy practices, according to Dr. Espenel and coauthors.

A central area of research has focused on radioimmunotherapy, an approach that aims to enhance the antitumor immune response. One RCT in the preoperative setting showed, for instance, that concurrent stereotactic body radiotherapy delivered at 24 Gy over eight fractions, along with the anti–PD-L1 agent durvalumab, increased major pathologic complete response rates almost eightfold in comparison with durvalumab alone for patients with early-stage lung cancer (53.3% vs. 6.7%).

Although promising, not all trials that evaluated a concurrent chemoradiotherapy-immunotherapy strategy showed positive results. One RCT of locally advanced head and neck squamous cell carcinoma, for instance, found that median progression-free survival was not reached when adding the anti–PD-L1 avelumab to chemoradiotherapy. In addition, trials in the metastatic setting have shown conflicting results, the authors note.

Another topic of interest is that of newer radiosensitizers. A trial that evaluated high-risk locoregionally advanced head and neck squamous cell carcinoma highlighted the efficacy of xevinapant, a pro-apoptotic agent that inhibits apoptosis proteins. Xevinapant was used for the first time in conjunction with a standard high-dose cisplatin chemoradiotherapy. In this study, locoregional control at 18 months was achieved for 54% of patients who received xevinapant vs. 33% of those who received standard care. The toxicity profiles were similar.

The use of high-tech radiotherapy is gaining ground. It allows patients to receive more targeted treatments at lower doses and in shorter time frames. One trial found, for instance, that a more hypofractionated adjuvant whole breast approach, using 26 Gy in five fractions over a week, is as effective and safe as 40 Gy in 15 fractions over 3 weeks. The researchers found that there was no difference in the incidence of locoregional relapses, disease-free survival, and overall survival between the regimens.

Dr. Simone also noted that advanced treatment modalities, such as intensity-modulated radiotherapy, stereotactic radiosurgery, and proton therapy, have the potential to improve patient-reported adverse events and clinical outcomes. “I have seen this both in my clinical practice and in several recent publications,” he says.

Personalization of radiotherapy is also an emerging area that may allow for more tailored treatments with improved outcomes. The authors highlighted a study that found that PMSA PET-CT was better than conventional CT for accurately staging prostate cancer. This approach was also less expensive and led to less radiation exposure.

On the basis of this research, “PMSA PET-CT has since become the [standard of care] for prostate cancer staging,” the authors explain.

Dr. Espenel and colleagues note that as patients survive longer, quality of life and patient satisfaction are increasingly becoming endpoints in RCTs. Experts are focusing more attention on sequelae of treatments and advances in technology that can spare critical organs from radiation and reduce overall treatment time.

Shared decision-making is becoming increasingly possible in many cases as well. For example, with some clinical trials that involved different treatment modalities, outcomes were equivalent, but toxicity profiles differed, allowing patients to choose therapeutic options tailored to their preferences.

Overall, these data demonstrate “a great dynamism of radiation oncology research in most primary tumor types,” the researchers write.

The study received no outside financial support. The authors have disclosed no relevant financial relationships. Dr. Simone is chair of the American Society for Radiation Oncology Lung Resource Panel and the American Society for Radiation Oncology Veteran Affairs Radiation Oncology Quality Surveillance Blue Ribbon Lung Panel and has received honorarium from Varian Medical Systems.

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

The field of radiation oncology has rapidly evolved in recent years, thanks in large part to findings from randomized clinical trials (RCTs) that have helped shift therapeutic standards, a review of the literature shows.

The authors assessed all RCTs involving radiotherapy from 2018 to 2021, with the goal of identifying the latest practice-changing data, emerging concepts, and areas that require further study.

Highlights from this research reveal how high-tech radiotherapy, such as hypofractionation and stereotactic body radiotherapy, has improved care for many patients, how personalized radiotherapy using image-based guidance has helped tailor treatments, and how endpoints that focus on quality of life and patient satisfaction are emerging.

For instance, Charles B. Simone II, MD, FACRO, who was not involved in the current work, pointed to “a proliferation of trials assessing hypofractionation in the curative setting and stereotactic body radiation therapy in the curative and poly- and oligometastatic settings that have allowed for increased patient convenience and dose intensification, respectively.”

Dr. Simone, chief medical officer, New York Proton Center, Memorial Sloan Kettering Cancer Center, also noted that the first personalized radiotherapy trials using imaging and biological markers have “the profound potential to individualize treatment and improve patient outcomes.”

The review was published in the European Journal of Cancer.
 

An evolving field

Given the fast-changing landscape for cancer therapeutics and a deluge of research studies, the authors wanted to understand the most notable advances established in recent trials as well as caveats to some approaches and emerging areas to watch.

In the review, Sophie Espenel, MD, from the department of radiation oncology, Gustave Roussy Cancer Campus, Villejuif, France, and colleagues identified 1,347 radiotherapy RCTs that were conducted from January 2018 to December 2021. Of these, the authors selected 110 large phase 2 or 3 RCTs that contained data showing practice-changing or emerging concepts.

Overall, the studies showed “great dynamism” in radiation oncology research and covered a wide range of radiotherapy practices, according to Dr. Espenel and coauthors.

A central area of research has focused on radioimmunotherapy, an approach that aims to enhance the antitumor immune response. One RCT in the preoperative setting showed, for instance, that concurrent stereotactic body radiotherapy delivered at 24 Gy over eight fractions, along with the anti–PD-L1 agent durvalumab, increased major pathologic complete response rates almost eightfold in comparison with durvalumab alone for patients with early-stage lung cancer (53.3% vs. 6.7%).

Although promising, not all trials that evaluated a concurrent chemoradiotherapy-immunotherapy strategy showed positive results. One RCT of locally advanced head and neck squamous cell carcinoma, for instance, found that median progression-free survival was not reached when adding the anti–PD-L1 avelumab to chemoradiotherapy. In addition, trials in the metastatic setting have shown conflicting results, the authors note.

Another topic of interest is that of newer radiosensitizers. A trial that evaluated high-risk locoregionally advanced head and neck squamous cell carcinoma highlighted the efficacy of xevinapant, a pro-apoptotic agent that inhibits apoptosis proteins. Xevinapant was used for the first time in conjunction with a standard high-dose cisplatin chemoradiotherapy. In this study, locoregional control at 18 months was achieved for 54% of patients who received xevinapant vs. 33% of those who received standard care. The toxicity profiles were similar.

The use of high-tech radiotherapy is gaining ground. It allows patients to receive more targeted treatments at lower doses and in shorter time frames. One trial found, for instance, that a more hypofractionated adjuvant whole breast approach, using 26 Gy in five fractions over a week, is as effective and safe as 40 Gy in 15 fractions over 3 weeks. The researchers found that there was no difference in the incidence of locoregional relapses, disease-free survival, and overall survival between the regimens.

Dr. Simone also noted that advanced treatment modalities, such as intensity-modulated radiotherapy, stereotactic radiosurgery, and proton therapy, have the potential to improve patient-reported adverse events and clinical outcomes. “I have seen this both in my clinical practice and in several recent publications,” he says.

Personalization of radiotherapy is also an emerging area that may allow for more tailored treatments with improved outcomes. The authors highlighted a study that found that PMSA PET-CT was better than conventional CT for accurately staging prostate cancer. This approach was also less expensive and led to less radiation exposure.

On the basis of this research, “PMSA PET-CT has since become the [standard of care] for prostate cancer staging,” the authors explain.

Dr. Espenel and colleagues note that as patients survive longer, quality of life and patient satisfaction are increasingly becoming endpoints in RCTs. Experts are focusing more attention on sequelae of treatments and advances in technology that can spare critical organs from radiation and reduce overall treatment time.

Shared decision-making is becoming increasingly possible in many cases as well. For example, with some clinical trials that involved different treatment modalities, outcomes were equivalent, but toxicity profiles differed, allowing patients to choose therapeutic options tailored to their preferences.

Overall, these data demonstrate “a great dynamism of radiation oncology research in most primary tumor types,” the researchers write.

The study received no outside financial support. The authors have disclosed no relevant financial relationships. Dr. Simone is chair of the American Society for Radiation Oncology Lung Resource Panel and the American Society for Radiation Oncology Veteran Affairs Radiation Oncology Quality Surveillance Blue Ribbon Lung Panel and has received honorarium from Varian Medical Systems.

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

The field of radiation oncology has rapidly evolved in recent years, thanks in large part to findings from randomized clinical trials (RCTs) that have helped shift therapeutic standards, a review of the literature shows.

The authors assessed all RCTs involving radiotherapy from 2018 to 2021, with the goal of identifying the latest practice-changing data, emerging concepts, and areas that require further study.

Highlights from this research reveal how high-tech radiotherapy, such as hypofractionation and stereotactic body radiotherapy, has improved care for many patients, how personalized radiotherapy using image-based guidance has helped tailor treatments, and how endpoints that focus on quality of life and patient satisfaction are emerging.

For instance, Charles B. Simone II, MD, FACRO, who was not involved in the current work, pointed to “a proliferation of trials assessing hypofractionation in the curative setting and stereotactic body radiation therapy in the curative and poly- and oligometastatic settings that have allowed for increased patient convenience and dose intensification, respectively.”

Dr. Simone, chief medical officer, New York Proton Center, Memorial Sloan Kettering Cancer Center, also noted that the first personalized radiotherapy trials using imaging and biological markers have “the profound potential to individualize treatment and improve patient outcomes.”

The review was published in the European Journal of Cancer.
 

An evolving field

Given the fast-changing landscape for cancer therapeutics and a deluge of research studies, the authors wanted to understand the most notable advances established in recent trials as well as caveats to some approaches and emerging areas to watch.

In the review, Sophie Espenel, MD, from the department of radiation oncology, Gustave Roussy Cancer Campus, Villejuif, France, and colleagues identified 1,347 radiotherapy RCTs that were conducted from January 2018 to December 2021. Of these, the authors selected 110 large phase 2 or 3 RCTs that contained data showing practice-changing or emerging concepts.

Overall, the studies showed “great dynamism” in radiation oncology research and covered a wide range of radiotherapy practices, according to Dr. Espenel and coauthors.

A central area of research has focused on radioimmunotherapy, an approach that aims to enhance the antitumor immune response. One RCT in the preoperative setting showed, for instance, that concurrent stereotactic body radiotherapy delivered at 24 Gy over eight fractions, along with the anti–PD-L1 agent durvalumab, increased major pathologic complete response rates almost eightfold in comparison with durvalumab alone for patients with early-stage lung cancer (53.3% vs. 6.7%).

Although promising, not all trials that evaluated a concurrent chemoradiotherapy-immunotherapy strategy showed positive results. One RCT of locally advanced head and neck squamous cell carcinoma, for instance, found that median progression-free survival was not reached when adding the anti–PD-L1 avelumab to chemoradiotherapy. In addition, trials in the metastatic setting have shown conflicting results, the authors note.

Another topic of interest is that of newer radiosensitizers. A trial that evaluated high-risk locoregionally advanced head and neck squamous cell carcinoma highlighted the efficacy of xevinapant, a pro-apoptotic agent that inhibits apoptosis proteins. Xevinapant was used for the first time in conjunction with a standard high-dose cisplatin chemoradiotherapy. In this study, locoregional control at 18 months was achieved for 54% of patients who received xevinapant vs. 33% of those who received standard care. The toxicity profiles were similar.

The use of high-tech radiotherapy is gaining ground. It allows patients to receive more targeted treatments at lower doses and in shorter time frames. One trial found, for instance, that a more hypofractionated adjuvant whole breast approach, using 26 Gy in five fractions over a week, is as effective and safe as 40 Gy in 15 fractions over 3 weeks. The researchers found that there was no difference in the incidence of locoregional relapses, disease-free survival, and overall survival between the regimens.

Dr. Simone also noted that advanced treatment modalities, such as intensity-modulated radiotherapy, stereotactic radiosurgery, and proton therapy, have the potential to improve patient-reported adverse events and clinical outcomes. “I have seen this both in my clinical practice and in several recent publications,” he says.

Personalization of radiotherapy is also an emerging area that may allow for more tailored treatments with improved outcomes. The authors highlighted a study that found that PMSA PET-CT was better than conventional CT for accurately staging prostate cancer. This approach was also less expensive and led to less radiation exposure.

On the basis of this research, “PMSA PET-CT has since become the [standard of care] for prostate cancer staging,” the authors explain.

Dr. Espenel and colleagues note that as patients survive longer, quality of life and patient satisfaction are increasingly becoming endpoints in RCTs. Experts are focusing more attention on sequelae of treatments and advances in technology that can spare critical organs from radiation and reduce overall treatment time.

Shared decision-making is becoming increasingly possible in many cases as well. For example, with some clinical trials that involved different treatment modalities, outcomes were equivalent, but toxicity profiles differed, allowing patients to choose therapeutic options tailored to their preferences.

Overall, these data demonstrate “a great dynamism of radiation oncology research in most primary tumor types,” the researchers write.

The study received no outside financial support. The authors have disclosed no relevant financial relationships. Dr. Simone is chair of the American Society for Radiation Oncology Lung Resource Panel and the American Society for Radiation Oncology Veteran Affairs Radiation Oncology Quality Surveillance Blue Ribbon Lung Panel and has received honorarium from Varian Medical Systems.

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

Despite some gains, new research shows ongoing gender imbalances in hematology and oncology, as reflected in the predominantly male presenters at board review lecture series – where early career faculty are also underrepresented.

“Our study provides the first analysis of gender and early-career faculty disparities in speakers at hematology and medical oncology board review meetings,” the authors reported in research published in Blood Advances.

“We covered six major board reviews over the last 5 years that are either conducted yearly or every other year, [and] the general trend across all meetings showed skewness toward men speakers,” the authors reported.

Recent data from 2021 suggests a closing of the gender gap in oncology, with women making up 44.6% of oncologists in training. However, they still only represented 35.2% of practicing oncologists and are underrepresented in leadership positions in academic oncology, the authors reported.

With speaking roles at academic meetings potentially marking a key step in career advancement and improved opportunities, the authors sought to investigate the balance of gender, as well as early-career faculty among speakers at prominent hematology and/or oncology board review lecture series taking place in the United States between 2017 and 2021.

The five institutions and one society presenting the board review lecture series included Baylor College of Medicine/MD Anderson Cancer Center, both in Houston; Dana-Farber Brigham Cancer Center, Boston; George Washington University, Washington; Memorial Sloan Kettering Cancer Center, New York; Seattle Cancer Care Alliance; and the hematology board review series from the American Society of Hematology.

During the period in question, among 1,224 board review lectures presented, women constituted only 37.7% of the speakers. In lectures presented by American Board of Internal Medicine–certified speakers (n = 1,016, 83%), women were found to have made up fewer than 50% of speakers in five of six courses.

Men were also more likely to be recurrent speakers; across all courses, 13 men but only 2 women conducted 10 or more lectures. And while 35 men gave six or more lectures across all courses, only 12 women did so.

The lecture topics with the lowest rates of women presenters included malignant hematology (24.8%), solid tumors (38.9%), and benign hematology lectures (44.1%).

courtesy Dr. Al Hadidi

“We suspected [the imbalance in malignant hematology] since multiple recurrent roles were concentrated in the malignant hematology,” senior author Samer Al Hadidi, MD, of the Myeloma Center, Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AK, said in an interview.

He noted that “there are no regulations that such courses need to follow to ensure certain proportions of women and junior faculty are involved.”
 

Early-career faculty

In terms of early-career representation, more than 50% of lectures were given by faculty who had received their initial certifications more than 15 years earlier. The median time from initial certification was 12.5 years for hematology and 14 years for medical oncology.

The findings that more than half of the board review lectures were presented by faculty with more than 15 years’ experience since initial certification “reflects a lack of appropriate involvement of early-career faculty, who arguably may have more recent experience with board certification,” the authors wrote.

While being underrepresented in such roles is detrimental, there are no regulations that such courses follow to ensure certain proportions of women and junior faculty are involved, Dr. Al Hadidi noted.
 

Equal representation remains elusive

The study does suggest some notable gains. In a previous study of 181 academic conferences in the United States and Canada between 2007 and 2017, the rate of women speakers was only 15%, compared with 37.7% in the new study.

And an overall trend analysis in the study shows an approximately 10% increase in representation of women in all of the board reviews. However, only the ASH hematology board review achieved more than 50% women in their two courses.

“Overall, the proportion of women speakers is improving over the years, though it remains suboptimal,” Dr. Al Hadidi said.

The authors noted that oncology is clearly not the only specialty with gender disparities. They documented a lack of women speakers at conferences involving otolaryngology head and neck meetings, radiation oncology, emergency medicine, and research conferences.

They pointed to the work of ASH’s Women in Hematology Working Group as an important example of the needed effort to improve the balance of women hematologists.

courtesy Penn Medicine

Ariela Marshall, MD, director of women’s thrombosis and hemostasis at Penn Medicine in Philadelphia and a leader of ASH’s Women in Hematology Working Group, agreed that more efforts are needed to address both gender disparities as well as those of early career speakers. She asserted that the two disparities appear to be connected.

“If you broke down gender representation over time and the faculty/time since initial certification, the findings may mirror the percent of women in hematology-oncology at that given point in time,” Dr. Marshall said in an interview.

“If an institution is truly committed to taking action on gender equity, it needs to look at gender and experience equity of speakers,” she said. “Perhaps it’s the time to say ‘Dr. X has been doing this review course for 15 years. Let’s give someone else a chance.’

“This is not even just from a gender equity perspective but from a career development perspective overall,” she added. “Junior faculty need these speaking engagements a lot more than senior faculty.”

Meanwhile, the higher number of female trainees is a trend that ideally will be sustained as those trainees move into positions of leadership, Dr. Marshall noted.

“We do see that over time, we have achieved gender equity in the percent of women matriculating to medical school. And my hope is that, 20 years down the line, we will see the effects of this reflected in increased equity in leadership positions such as division/department chair, dean, and hospital CEO,” she said. “However, we have a lot of work to do because there are still huge inequities in the culture of medicine (institutional and more broadly), including gender-based discrimination, maternal discrimination, and high attrition rates for women physicians, compared to male physicians.

“It’s not enough to simply say ‘well, we have fixed the problem because our incoming medical student classes are now equitable in gender distribution,’ ”

The authors and Dr. Marshall had no disclosures to report.

Despite some gains, new research shows ongoing gender imbalances in hematology and oncology, as reflected in the predominantly male presenters at board review lecture series – where early career faculty are also underrepresented.

“Our study provides the first analysis of gender and early-career faculty disparities in speakers at hematology and medical oncology board review meetings,” the authors reported in research published in Blood Advances.

“We covered six major board reviews over the last 5 years that are either conducted yearly or every other year, [and] the general trend across all meetings showed skewness toward men speakers,” the authors reported.

Recent data from 2021 suggests a closing of the gender gap in oncology, with women making up 44.6% of oncologists in training. However, they still only represented 35.2% of practicing oncologists and are underrepresented in leadership positions in academic oncology, the authors reported.

With speaking roles at academic meetings potentially marking a key step in career advancement and improved opportunities, the authors sought to investigate the balance of gender, as well as early-career faculty among speakers at prominent hematology and/or oncology board review lecture series taking place in the United States between 2017 and 2021.

The five institutions and one society presenting the board review lecture series included Baylor College of Medicine/MD Anderson Cancer Center, both in Houston; Dana-Farber Brigham Cancer Center, Boston; George Washington University, Washington; Memorial Sloan Kettering Cancer Center, New York; Seattle Cancer Care Alliance; and the hematology board review series from the American Society of Hematology.

During the period in question, among 1,224 board review lectures presented, women constituted only 37.7% of the speakers. In lectures presented by American Board of Internal Medicine–certified speakers (n = 1,016, 83%), women were found to have made up fewer than 50% of speakers in five of six courses.

Men were also more likely to be recurrent speakers; across all courses, 13 men but only 2 women conducted 10 or more lectures. And while 35 men gave six or more lectures across all courses, only 12 women did so.

The lecture topics with the lowest rates of women presenters included malignant hematology (24.8%), solid tumors (38.9%), and benign hematology lectures (44.1%).

courtesy Dr. Al Hadidi

“We suspected [the imbalance in malignant hematology] since multiple recurrent roles were concentrated in the malignant hematology,” senior author Samer Al Hadidi, MD, of the Myeloma Center, Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AK, said in an interview.

He noted that “there are no regulations that such courses need to follow to ensure certain proportions of women and junior faculty are involved.”
 

Early-career faculty

In terms of early-career representation, more than 50% of lectures were given by faculty who had received their initial certifications more than 15 years earlier. The median time from initial certification was 12.5 years for hematology and 14 years for medical oncology.

The findings that more than half of the board review lectures were presented by faculty with more than 15 years’ experience since initial certification “reflects a lack of appropriate involvement of early-career faculty, who arguably may have more recent experience with board certification,” the authors wrote.

While being underrepresented in such roles is detrimental, there are no regulations that such courses follow to ensure certain proportions of women and junior faculty are involved, Dr. Al Hadidi noted.
 

Equal representation remains elusive

The study does suggest some notable gains. In a previous study of 181 academic conferences in the United States and Canada between 2007 and 2017, the rate of women speakers was only 15%, compared with 37.7% in the new study.

And an overall trend analysis in the study shows an approximately 10% increase in representation of women in all of the board reviews. However, only the ASH hematology board review achieved more than 50% women in their two courses.

“Overall, the proportion of women speakers is improving over the years, though it remains suboptimal,” Dr. Al Hadidi said.

The authors noted that oncology is clearly not the only specialty with gender disparities. They documented a lack of women speakers at conferences involving otolaryngology head and neck meetings, radiation oncology, emergency medicine, and research conferences.

They pointed to the work of ASH’s Women in Hematology Working Group as an important example of the needed effort to improve the balance of women hematologists.

courtesy Penn Medicine

Ariela Marshall, MD, director of women’s thrombosis and hemostasis at Penn Medicine in Philadelphia and a leader of ASH’s Women in Hematology Working Group, agreed that more efforts are needed to address both gender disparities as well as those of early career speakers. She asserted that the two disparities appear to be connected.

“If you broke down gender representation over time and the faculty/time since initial certification, the findings may mirror the percent of women in hematology-oncology at that given point in time,” Dr. Marshall said in an interview.

“If an institution is truly committed to taking action on gender equity, it needs to look at gender and experience equity of speakers,” she said. “Perhaps it’s the time to say ‘Dr. X has been doing this review course for 15 years. Let’s give someone else a chance.’

“This is not even just from a gender equity perspective but from a career development perspective overall,” she added. “Junior faculty need these speaking engagements a lot more than senior faculty.”

Meanwhile, the higher number of female trainees is a trend that ideally will be sustained as those trainees move into positions of leadership, Dr. Marshall noted.

“We do see that over time, we have achieved gender equity in the percent of women matriculating to medical school. And my hope is that, 20 years down the line, we will see the effects of this reflected in increased equity in leadership positions such as division/department chair, dean, and hospital CEO,” she said. “However, we have a lot of work to do because there are still huge inequities in the culture of medicine (institutional and more broadly), including gender-based discrimination, maternal discrimination, and high attrition rates for women physicians, compared to male physicians.

“It’s not enough to simply say ‘well, we have fixed the problem because our incoming medical student classes are now equitable in gender distribution,’ ”

The authors and Dr. Marshall had no disclosures to report.

Despite some gains, new research shows ongoing gender imbalances in hematology and oncology, as reflected in the predominantly male presenters at board review lecture series – where early career faculty are also underrepresented.

“Our study provides the first analysis of gender and early-career faculty disparities in speakers at hematology and medical oncology board review meetings,” the authors reported in research published in Blood Advances.

“We covered six major board reviews over the last 5 years that are either conducted yearly or every other year, [and] the general trend across all meetings showed skewness toward men speakers,” the authors reported.

Recent data from 2021 suggests a closing of the gender gap in oncology, with women making up 44.6% of oncologists in training. However, they still only represented 35.2% of practicing oncologists and are underrepresented in leadership positions in academic oncology, the authors reported.

With speaking roles at academic meetings potentially marking a key step in career advancement and improved opportunities, the authors sought to investigate the balance of gender, as well as early-career faculty among speakers at prominent hematology and/or oncology board review lecture series taking place in the United States between 2017 and 2021.

The five institutions and one society presenting the board review lecture series included Baylor College of Medicine/MD Anderson Cancer Center, both in Houston; Dana-Farber Brigham Cancer Center, Boston; George Washington University, Washington; Memorial Sloan Kettering Cancer Center, New York; Seattle Cancer Care Alliance; and the hematology board review series from the American Society of Hematology.

During the period in question, among 1,224 board review lectures presented, women constituted only 37.7% of the speakers. In lectures presented by American Board of Internal Medicine–certified speakers (n = 1,016, 83%), women were found to have made up fewer than 50% of speakers in five of six courses.

Men were also more likely to be recurrent speakers; across all courses, 13 men but only 2 women conducted 10 or more lectures. And while 35 men gave six or more lectures across all courses, only 12 women did so.

The lecture topics with the lowest rates of women presenters included malignant hematology (24.8%), solid tumors (38.9%), and benign hematology lectures (44.1%).

courtesy Dr. Al Hadidi

“We suspected [the imbalance in malignant hematology] since multiple recurrent roles were concentrated in the malignant hematology,” senior author Samer Al Hadidi, MD, of the Myeloma Center, Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AK, said in an interview.

He noted that “there are no regulations that such courses need to follow to ensure certain proportions of women and junior faculty are involved.”
 

Early-career faculty

In terms of early-career representation, more than 50% of lectures were given by faculty who had received their initial certifications more than 15 years earlier. The median time from initial certification was 12.5 years for hematology and 14 years for medical oncology.

The findings that more than half of the board review lectures were presented by faculty with more than 15 years’ experience since initial certification “reflects a lack of appropriate involvement of early-career faculty, who arguably may have more recent experience with board certification,” the authors wrote.

While being underrepresented in such roles is detrimental, there are no regulations that such courses follow to ensure certain proportions of women and junior faculty are involved, Dr. Al Hadidi noted.
 

Equal representation remains elusive

The study does suggest some notable gains. In a previous study of 181 academic conferences in the United States and Canada between 2007 and 2017, the rate of women speakers was only 15%, compared with 37.7% in the new study.

And an overall trend analysis in the study shows an approximately 10% increase in representation of women in all of the board reviews. However, only the ASH hematology board review achieved more than 50% women in their two courses.

“Overall, the proportion of women speakers is improving over the years, though it remains suboptimal,” Dr. Al Hadidi said.

The authors noted that oncology is clearly not the only specialty with gender disparities. They documented a lack of women speakers at conferences involving otolaryngology head and neck meetings, radiation oncology, emergency medicine, and research conferences.

They pointed to the work of ASH’s Women in Hematology Working Group as an important example of the needed effort to improve the balance of women hematologists.

courtesy Penn Medicine

Ariela Marshall, MD, director of women’s thrombosis and hemostasis at Penn Medicine in Philadelphia and a leader of ASH’s Women in Hematology Working Group, agreed that more efforts are needed to address both gender disparities as well as those of early career speakers. She asserted that the two disparities appear to be connected.

“If you broke down gender representation over time and the faculty/time since initial certification, the findings may mirror the percent of women in hematology-oncology at that given point in time,” Dr. Marshall said in an interview.

“If an institution is truly committed to taking action on gender equity, it needs to look at gender and experience equity of speakers,” she said. “Perhaps it’s the time to say ‘Dr. X has been doing this review course for 15 years. Let’s give someone else a chance.’

“This is not even just from a gender equity perspective but from a career development perspective overall,” she added. “Junior faculty need these speaking engagements a lot more than senior faculty.”

Meanwhile, the higher number of female trainees is a trend that ideally will be sustained as those trainees move into positions of leadership, Dr. Marshall noted.

“We do see that over time, we have achieved gender equity in the percent of women matriculating to medical school. And my hope is that, 20 years down the line, we will see the effects of this reflected in increased equity in leadership positions such as division/department chair, dean, and hospital CEO,” she said. “However, we have a lot of work to do because there are still huge inequities in the culture of medicine (institutional and more broadly), including gender-based discrimination, maternal discrimination, and high attrition rates for women physicians, compared to male physicians.

“It’s not enough to simply say ‘well, we have fixed the problem because our incoming medical student classes are now equitable in gender distribution,’ ”

The authors and Dr. Marshall had no disclosures to report.

Most diagnoses of acute myeloid leukemia (AML) are made during January. This finding strongly implies that seasonal factors, such as infectious agents or environmental triggers, influence the development or proliferation of the disease, which points to prevention opportunities. This was the conclusion of an international study led by a team from the Jiménez Díaz Foundation University Hospital Health Research Institute (IIS-FJD) in Madrid, in collaboration with colleagues from the University of Bristol, England. Their work was published in the British Journal of Haematology.

The study’s aim was to investigate the potential seasonal and long-term trends in AML diagnosis in an overall population and in subgroups according to sex and age. To do so, the researchers examined 26,472 cases of AML diagnosed in Spain between 2004 and 2015. They found seasonality in the diagnosis of this type of leukemia. This “could point to there being an underlying seasonal etiology at play,” noted one of the main authors of the study, Juan Manuel Alonso, MD, a physician in the IIS-FJD’s department of hematology and hemotherapy.

“The environmental triggers involved could be radiation, pollution, allergens, or infectious agents like viruses. We’re leaning toward viruses, because there are already distinct solid tumor and hematologic cancers that are caused by them and because, in the winter months, there’s an increased incidence of cancers due to viral infections,” Dr. Alonso said in an interview. “The etiological mechanism should be different from that exerted by chronic viral pressure, because here we’re dealing with an acute and aggressive disease that probably needs a short incubation period.”
 

Various hypotheses

In an interview, David Martínez, MD, a hematologist at La Fe University Hospital in Valencia, Spain, described the research as “an extremely well done and much-discussed study on AML, a disease that appears to be diagnosed more frequently at a certain time of year – namely, January.

“There’s no clear explanation for this finding,” Dr. Martínez said. “Several possible reasons have been put forward and are being talked about. The one that seems to hold the most water is the hypothesis that infectious agents and environmental factors may have a greater influence. This is because the idea that they’re involved in neoplastic diseases is nothing new. In fact, there are a lot of publications and a good amount of scientific evidence that link viral infections and environmental factors with the development of oncologic diseases.”

AML is a rare disease yet is responsible for many cancer-related deaths. Mutations that cause AML can occur due to an inherited mutant gene or exposure to certain carcinogens, such as chemotherapy, radiotherapy, ionizing radiation, tobacco, and benzene. These findings are broadly similar to those of a large U.S.-based study by Calip et al., who found a peak of adult AML diagnoses during December and January from 1992 to 2008. Previous smaller studies have provided conflicting evidence, likely due to lower power or to the use of less advanced statistical approaches.
 

Seasonal factors involved?

Demonstration of seasonal variation in the occurrence of AML would, firstly, provide supportive evidence of etiology by seasonal factors, such as infectious agents or environmental factors, and, secondly, focus research onto the etiologic role of such factors.

The current study used population-based data on cases of AML occurring in Spain from a nationwide hospital discharge registry for the years 2004 to 2015. “This is, to our knowledge, the largest study aimed at investigating the potential seasonal and long-term trends in AML incidence in an overall population and in subgroups according to sex and age while employing novel statistical models with serial dependence for discrete-valued time series,” wrote the researchers.

They extracted information from the register of each case about the date of admission, discharge date, the anonymous identifier for each patient, International Classification of Diseases (ICD)–9 codes, sex, and date of birth, from which they derived age groups as described for the at-risk population. For patients hospitalized on more than one occasion, only the record corresponding to their first diagnosis of AML was selected.

AML cases per month were standardized to months of equal length.

Age/sex-standardized monthly incidence rates of AML were calculated using the census of Spanish population in 2010 as a “standard” population. Age-standardized and sex-standardized monthly incidence rates of AML were calculated.

Nine separate time-series decompositions were performed as an initial exploratory analysis on the monthly incidence rates of AML using data for all cases and data for each sex and age group. Nine separate Poisson generalized linear autoregressive moving average (GLARMA) models were fitted to evaluate the temporal dynamics in AML incidence using data for all cases, and data for each sex and age group.
 

Long-term trend

A total of 26,472 patients with a first diagnosis of active AML were hospitalized in Spain and registered at the country’s Minimum Basic Data Set (CMBD) during 2004-2015. In the end, there were 26,475 patients in the study population; a greater proportion of cases were male (56.0%), and the median age at diagnosis was 67 years.

Seasonal and trend decomposition using Loess decomposition of the incidence rates observed in the overall population exhibited seasonal fluctuation with a peak in January. A slight upward trend was apparent from visual inspection with an upturn in early 2005 and a downturn at the end of 2013. As for the differences by sex groups and age groups, Dr. Alonso said, “For both sexes and in age groups 5-19, 20-49, and 50-64 years, we found that the results were identical to those found in the overall population.”

The final model included an upward linear long-term trend, as well as the variables monthly seasonality and December 2015. The estimated monthly long-term trend implies that the monthly incidence rates of AML diagnoses annually increased by 0.4% (95% confidence interval [CI], 0.2%-0.6%; P = .0011), given that the other covariates are held constant.

January displayed the highest incidence rate of AML, with a minimum average difference of 7%, when compared with February (95% CI, 2%-12%; P = .0143) and a maximum average difference of 16%, compared with November (95% CI, 11%-21%; P < .0001) and August (95% CI, 10%-21%; P < .0001).

The incidence rate of AML for December 2015 was 0.43 (95% CI, 0.34-0.54; P < .0001) times the average incidence rate for the rest of the study period.
 

Potential role of viruses

“We have to keep in mind that infectious agents (viral infections) and environmental factors (allergens) don’t disappear in the warmer months,” Dr. Martínez added. “There are just other viruses and different factors. We don’t know the role or the weight that each one of the factors has, either individually or specifically, in the development of AML. In addition, we know that AML is a very heterogeneous disease and that various factors, including genetic ones, can be involved in its etiopathogenesis.”

With respect to the stem cell theory in this leukemia, Dr. Alonso emphasized that, “in theory, the virus could fit into it with no problem. That said, any other environmental agent could also produce the described phenomenon where the rapid proliferation of quiescent leukemic stem cells is stimulated, thereby hastening the diagnosis.”

“Should the etiological factor be found,” Dr. Martínez noted, “we can try to reduce exposure and thereby decrease the incidence of AML. On the other hand, discovering how the environmental factor stimulates the proliferation of quiescent leukemic [stem] cells could enhance our knowledge about the regulation of that.”

As to whether there is evidence for the involvement of infections in other hematologic malignancies, Dr. Martínez reported, “This has already been seen. And this study shows other examples (Epstein-Barr virus and human T-cell lymphotropic virus type 1 with lymphomas), and there could also be Helicobacter pylori  and lymphomas.”

Outside of hematology, human papillomavirus has been associated with cervical cancer, tobacco with lung cancer, sun with skin cancer, and diet with the development of some solid neoplasms.

“The study speaks about the concept of a latency period. To accept the idea that a factor or virus that’s more prevalent in winter produces, on its own, AML in a few weeks or months means accepting the idea of a very short latency period – something that’s not usually the case. For that, another explanation is given: An abnormal immune response or that a seasonal infectious agent can be capable of promoting leukemogenesis. These are also hypotheses to be explored in the future,” suggested Dr. Martínez.
 

New research network

Several potential limitations of this study should be considered. One limitation is that AML cases were obtained from the CMBD registry as defined by ICD-9, and no other AML classifications were available. Another limitation is that information on the date of onset of clinical symptoms was not available for analysis. In addition, a further limitation related to the source of their data may have led the researchers to underestimate the incidence rates of AML in older patients, as only hospitalized patients were captured in their study.

As for continuing the research, the results make it necessary to carry out complementary epidemiologic studies that will examine the association between seasonal risk factors and the increased diagnosis of AML during winter months.

To go forward, the first step would be to secure funding. For this purpose, a network is being put together featuring collaborators from other world-renowned research groups that are at the top of their respective disciplines. Through this network, they hope to be able to apply together for public research grants from countries in Europe and elsewhere as well as to establish collaborations with various companies in the private sector.

“This could open up new therapeutic avenues in the future, as we could try to force leukemic stem cells to divide, thereby reducing the resistance that the standard treatments usually demonstrate,” Dr. Alonso concluded.

Dr. Alonso received research funding from Incyte, Pfizer International, and Astellas Pharma outside the present work. Dr. Martínez disclosed no relevant financial relationships.

This article was translated from the Medscape Spanish edition. A version of the article appeared on Medscape.com.

Most diagnoses of acute myeloid leukemia (AML) are made during January. This finding strongly implies that seasonal factors, such as infectious agents or environmental triggers, influence the development or proliferation of the disease, which points to prevention opportunities. This was the conclusion of an international study led by a team from the Jiménez Díaz Foundation University Hospital Health Research Institute (IIS-FJD) in Madrid, in collaboration with colleagues from the University of Bristol, England. Their work was published in the British Journal of Haematology.

The study’s aim was to investigate the potential seasonal and long-term trends in AML diagnosis in an overall population and in subgroups according to sex and age. To do so, the researchers examined 26,472 cases of AML diagnosed in Spain between 2004 and 2015. They found seasonality in the diagnosis of this type of leukemia. This “could point to there being an underlying seasonal etiology at play,” noted one of the main authors of the study, Juan Manuel Alonso, MD, a physician in the IIS-FJD’s department of hematology and hemotherapy.

“The environmental triggers involved could be radiation, pollution, allergens, or infectious agents like viruses. We’re leaning toward viruses, because there are already distinct solid tumor and hematologic cancers that are caused by them and because, in the winter months, there’s an increased incidence of cancers due to viral infections,” Dr. Alonso said in an interview. “The etiological mechanism should be different from that exerted by chronic viral pressure, because here we’re dealing with an acute and aggressive disease that probably needs a short incubation period.”
 

Various hypotheses

In an interview, David Martínez, MD, a hematologist at La Fe University Hospital in Valencia, Spain, described the research as “an extremely well done and much-discussed study on AML, a disease that appears to be diagnosed more frequently at a certain time of year – namely, January.

“There’s no clear explanation for this finding,” Dr. Martínez said. “Several possible reasons have been put forward and are being talked about. The one that seems to hold the most water is the hypothesis that infectious agents and environmental factors may have a greater influence. This is because the idea that they’re involved in neoplastic diseases is nothing new. In fact, there are a lot of publications and a good amount of scientific evidence that link viral infections and environmental factors with the development of oncologic diseases.”

AML is a rare disease yet is responsible for many cancer-related deaths. Mutations that cause AML can occur due to an inherited mutant gene or exposure to certain carcinogens, such as chemotherapy, radiotherapy, ionizing radiation, tobacco, and benzene. These findings are broadly similar to those of a large U.S.-based study by Calip et al., who found a peak of adult AML diagnoses during December and January from 1992 to 2008. Previous smaller studies have provided conflicting evidence, likely due to lower power or to the use of less advanced statistical approaches.
 

Seasonal factors involved?

Demonstration of seasonal variation in the occurrence of AML would, firstly, provide supportive evidence of etiology by seasonal factors, such as infectious agents or environmental factors, and, secondly, focus research onto the etiologic role of such factors.

The current study used population-based data on cases of AML occurring in Spain from a nationwide hospital discharge registry for the years 2004 to 2015. “This is, to our knowledge, the largest study aimed at investigating the potential seasonal and long-term trends in AML incidence in an overall population and in subgroups according to sex and age while employing novel statistical models with serial dependence for discrete-valued time series,” wrote the researchers.

They extracted information from the register of each case about the date of admission, discharge date, the anonymous identifier for each patient, International Classification of Diseases (ICD)–9 codes, sex, and date of birth, from which they derived age groups as described for the at-risk population. For patients hospitalized on more than one occasion, only the record corresponding to their first diagnosis of AML was selected.

AML cases per month were standardized to months of equal length.

Age/sex-standardized monthly incidence rates of AML were calculated using the census of Spanish population in 2010 as a “standard” population. Age-standardized and sex-standardized monthly incidence rates of AML were calculated.

Nine separate time-series decompositions were performed as an initial exploratory analysis on the monthly incidence rates of AML using data for all cases and data for each sex and age group. Nine separate Poisson generalized linear autoregressive moving average (GLARMA) models were fitted to evaluate the temporal dynamics in AML incidence using data for all cases, and data for each sex and age group.
 

Long-term trend

A total of 26,472 patients with a first diagnosis of active AML were hospitalized in Spain and registered at the country’s Minimum Basic Data Set (CMBD) during 2004-2015. In the end, there were 26,475 patients in the study population; a greater proportion of cases were male (56.0%), and the median age at diagnosis was 67 years.

Seasonal and trend decomposition using Loess decomposition of the incidence rates observed in the overall population exhibited seasonal fluctuation with a peak in January. A slight upward trend was apparent from visual inspection with an upturn in early 2005 and a downturn at the end of 2013. As for the differences by sex groups and age groups, Dr. Alonso said, “For both sexes and in age groups 5-19, 20-49, and 50-64 years, we found that the results were identical to those found in the overall population.”

The final model included an upward linear long-term trend, as well as the variables monthly seasonality and December 2015. The estimated monthly long-term trend implies that the monthly incidence rates of AML diagnoses annually increased by 0.4% (95% confidence interval [CI], 0.2%-0.6%; P = .0011), given that the other covariates are held constant.

January displayed the highest incidence rate of AML, with a minimum average difference of 7%, when compared with February (95% CI, 2%-12%; P = .0143) and a maximum average difference of 16%, compared with November (95% CI, 11%-21%; P < .0001) and August (95% CI, 10%-21%; P < .0001).

The incidence rate of AML for December 2015 was 0.43 (95% CI, 0.34-0.54; P < .0001) times the average incidence rate for the rest of the study period.
 

Potential role of viruses

“We have to keep in mind that infectious agents (viral infections) and environmental factors (allergens) don’t disappear in the warmer months,” Dr. Martínez added. “There are just other viruses and different factors. We don’t know the role or the weight that each one of the factors has, either individually or specifically, in the development of AML. In addition, we know that AML is a very heterogeneous disease and that various factors, including genetic ones, can be involved in its etiopathogenesis.”

With respect to the stem cell theory in this leukemia, Dr. Alonso emphasized that, “in theory, the virus could fit into it with no problem. That said, any other environmental agent could also produce the described phenomenon where the rapid proliferation of quiescent leukemic stem cells is stimulated, thereby hastening the diagnosis.”

“Should the etiological factor be found,” Dr. Martínez noted, “we can try to reduce exposure and thereby decrease the incidence of AML. On the other hand, discovering how the environmental factor stimulates the proliferation of quiescent leukemic [stem] cells could enhance our knowledge about the regulation of that.”

As to whether there is evidence for the involvement of infections in other hematologic malignancies, Dr. Martínez reported, “This has already been seen. And this study shows other examples (Epstein-Barr virus and human T-cell lymphotropic virus type 1 with lymphomas), and there could also be Helicobacter pylori  and lymphomas.”

Outside of hematology, human papillomavirus has been associated with cervical cancer, tobacco with lung cancer, sun with skin cancer, and diet with the development of some solid neoplasms.

“The study speaks about the concept of a latency period. To accept the idea that a factor or virus that’s more prevalent in winter produces, on its own, AML in a few weeks or months means accepting the idea of a very short latency period – something that’s not usually the case. For that, another explanation is given: An abnormal immune response or that a seasonal infectious agent can be capable of promoting leukemogenesis. These are also hypotheses to be explored in the future,” suggested Dr. Martínez.
 

New research network

Several potential limitations of this study should be considered. One limitation is that AML cases were obtained from the CMBD registry as defined by ICD-9, and no other AML classifications were available. Another limitation is that information on the date of onset of clinical symptoms was not available for analysis. In addition, a further limitation related to the source of their data may have led the researchers to underestimate the incidence rates of AML in older patients, as only hospitalized patients were captured in their study.

As for continuing the research, the results make it necessary to carry out complementary epidemiologic studies that will examine the association between seasonal risk factors and the increased diagnosis of AML during winter months.

To go forward, the first step would be to secure funding. For this purpose, a network is being put together featuring collaborators from other world-renowned research groups that are at the top of their respective disciplines. Through this network, they hope to be able to apply together for public research grants from countries in Europe and elsewhere as well as to establish collaborations with various companies in the private sector.

“This could open up new therapeutic avenues in the future, as we could try to force leukemic stem cells to divide, thereby reducing the resistance that the standard treatments usually demonstrate,” Dr. Alonso concluded.

Dr. Alonso received research funding from Incyte, Pfizer International, and Astellas Pharma outside the present work. Dr. Martínez disclosed no relevant financial relationships.

This article was translated from the Medscape Spanish edition. A version of the article appeared on Medscape.com.

Most diagnoses of acute myeloid leukemia (AML) are made during January. This finding strongly implies that seasonal factors, such as infectious agents or environmental triggers, influence the development or proliferation of the disease, which points to prevention opportunities. This was the conclusion of an international study led by a team from the Jiménez Díaz Foundation University Hospital Health Research Institute (IIS-FJD) in Madrid, in collaboration with colleagues from the University of Bristol, England. Their work was published in the British Journal of Haematology.

The study’s aim was to investigate the potential seasonal and long-term trends in AML diagnosis in an overall population and in subgroups according to sex and age. To do so, the researchers examined 26,472 cases of AML diagnosed in Spain between 2004 and 2015. They found seasonality in the diagnosis of this type of leukemia. This “could point to there being an underlying seasonal etiology at play,” noted one of the main authors of the study, Juan Manuel Alonso, MD, a physician in the IIS-FJD’s department of hematology and hemotherapy.

“The environmental triggers involved could be radiation, pollution, allergens, or infectious agents like viruses. We’re leaning toward viruses, because there are already distinct solid tumor and hematologic cancers that are caused by them and because, in the winter months, there’s an increased incidence of cancers due to viral infections,” Dr. Alonso said in an interview. “The etiological mechanism should be different from that exerted by chronic viral pressure, because here we’re dealing with an acute and aggressive disease that probably needs a short incubation period.”
 

Various hypotheses

In an interview, David Martínez, MD, a hematologist at La Fe University Hospital in Valencia, Spain, described the research as “an extremely well done and much-discussed study on AML, a disease that appears to be diagnosed more frequently at a certain time of year – namely, January.

“There’s no clear explanation for this finding,” Dr. Martínez said. “Several possible reasons have been put forward and are being talked about. The one that seems to hold the most water is the hypothesis that infectious agents and environmental factors may have a greater influence. This is because the idea that they’re involved in neoplastic diseases is nothing new. In fact, there are a lot of publications and a good amount of scientific evidence that link viral infections and environmental factors with the development of oncologic diseases.”

AML is a rare disease yet is responsible for many cancer-related deaths. Mutations that cause AML can occur due to an inherited mutant gene or exposure to certain carcinogens, such as chemotherapy, radiotherapy, ionizing radiation, tobacco, and benzene. These findings are broadly similar to those of a large U.S.-based study by Calip et al., who found a peak of adult AML diagnoses during December and January from 1992 to 2008. Previous smaller studies have provided conflicting evidence, likely due to lower power or to the use of less advanced statistical approaches.
 

Seasonal factors involved?

Demonstration of seasonal variation in the occurrence of AML would, firstly, provide supportive evidence of etiology by seasonal factors, such as infectious agents or environmental factors, and, secondly, focus research onto the etiologic role of such factors.

The current study used population-based data on cases of AML occurring in Spain from a nationwide hospital discharge registry for the years 2004 to 2015. “This is, to our knowledge, the largest study aimed at investigating the potential seasonal and long-term trends in AML incidence in an overall population and in subgroups according to sex and age while employing novel statistical models with serial dependence for discrete-valued time series,” wrote the researchers.

They extracted information from the register of each case about the date of admission, discharge date, the anonymous identifier for each patient, International Classification of Diseases (ICD)–9 codes, sex, and date of birth, from which they derived age groups as described for the at-risk population. For patients hospitalized on more than one occasion, only the record corresponding to their first diagnosis of AML was selected.

AML cases per month were standardized to months of equal length.

Age/sex-standardized monthly incidence rates of AML were calculated using the census of Spanish population in 2010 as a “standard” population. Age-standardized and sex-standardized monthly incidence rates of AML were calculated.

Nine separate time-series decompositions were performed as an initial exploratory analysis on the monthly incidence rates of AML using data for all cases and data for each sex and age group. Nine separate Poisson generalized linear autoregressive moving average (GLARMA) models were fitted to evaluate the temporal dynamics in AML incidence using data for all cases, and data for each sex and age group.
 

Long-term trend

A total of 26,472 patients with a first diagnosis of active AML were hospitalized in Spain and registered at the country’s Minimum Basic Data Set (CMBD) during 2004-2015. In the end, there were 26,475 patients in the study population; a greater proportion of cases were male (56.0%), and the median age at diagnosis was 67 years.

Seasonal and trend decomposition using Loess decomposition of the incidence rates observed in the overall population exhibited seasonal fluctuation with a peak in January. A slight upward trend was apparent from visual inspection with an upturn in early 2005 and a downturn at the end of 2013. As for the differences by sex groups and age groups, Dr. Alonso said, “For both sexes and in age groups 5-19, 20-49, and 50-64 years, we found that the results were identical to those found in the overall population.”

The final model included an upward linear long-term trend, as well as the variables monthly seasonality and December 2015. The estimated monthly long-term trend implies that the monthly incidence rates of AML diagnoses annually increased by 0.4% (95% confidence interval [CI], 0.2%-0.6%; P = .0011), given that the other covariates are held constant.

January displayed the highest incidence rate of AML, with a minimum average difference of 7%, when compared with February (95% CI, 2%-12%; P = .0143) and a maximum average difference of 16%, compared with November (95% CI, 11%-21%; P < .0001) and August (95% CI, 10%-21%; P < .0001).

The incidence rate of AML for December 2015 was 0.43 (95% CI, 0.34-0.54; P < .0001) times the average incidence rate for the rest of the study period.
 

Potential role of viruses

“We have to keep in mind that infectious agents (viral infections) and environmental factors (allergens) don’t disappear in the warmer months,” Dr. Martínez added. “There are just other viruses and different factors. We don’t know the role or the weight that each one of the factors has, either individually or specifically, in the development of AML. In addition, we know that AML is a very heterogeneous disease and that various factors, including genetic ones, can be involved in its etiopathogenesis.”

With respect to the stem cell theory in this leukemia, Dr. Alonso emphasized that, “in theory, the virus could fit into it with no problem. That said, any other environmental agent could also produce the described phenomenon where the rapid proliferation of quiescent leukemic stem cells is stimulated, thereby hastening the diagnosis.”

“Should the etiological factor be found,” Dr. Martínez noted, “we can try to reduce exposure and thereby decrease the incidence of AML. On the other hand, discovering how the environmental factor stimulates the proliferation of quiescent leukemic [stem] cells could enhance our knowledge about the regulation of that.”

As to whether there is evidence for the involvement of infections in other hematologic malignancies, Dr. Martínez reported, “This has already been seen. And this study shows other examples (Epstein-Barr virus and human T-cell lymphotropic virus type 1 with lymphomas), and there could also be Helicobacter pylori  and lymphomas.”

Outside of hematology, human papillomavirus has been associated with cervical cancer, tobacco with lung cancer, sun with skin cancer, and diet with the development of some solid neoplasms.

“The study speaks about the concept of a latency period. To accept the idea that a factor or virus that’s more prevalent in winter produces, on its own, AML in a few weeks or months means accepting the idea of a very short latency period – something that’s not usually the case. For that, another explanation is given: An abnormal immune response or that a seasonal infectious agent can be capable of promoting leukemogenesis. These are also hypotheses to be explored in the future,” suggested Dr. Martínez.
 

New research network

Several potential limitations of this study should be considered. One limitation is that AML cases were obtained from the CMBD registry as defined by ICD-9, and no other AML classifications were available. Another limitation is that information on the date of onset of clinical symptoms was not available for analysis. In addition, a further limitation related to the source of their data may have led the researchers to underestimate the incidence rates of AML in older patients, as only hospitalized patients were captured in their study.

As for continuing the research, the results make it necessary to carry out complementary epidemiologic studies that will examine the association between seasonal risk factors and the increased diagnosis of AML during winter months.

To go forward, the first step would be to secure funding. For this purpose, a network is being put together featuring collaborators from other world-renowned research groups that are at the top of their respective disciplines. Through this network, they hope to be able to apply together for public research grants from countries in Europe and elsewhere as well as to establish collaborations with various companies in the private sector.

“This could open up new therapeutic avenues in the future, as we could try to force leukemic stem cells to divide, thereby reducing the resistance that the standard treatments usually demonstrate,” Dr. Alonso concluded.

Dr. Alonso received research funding from Incyte, Pfizer International, and Astellas Pharma outside the present work. Dr. Martínez disclosed no relevant financial relationships.

This article was translated from the Medscape Spanish edition. A version of the article appeared on Medscape.com.

In the United States, uterine cancer is the fourth most common cancer among women, behind breast, lung/bronchus, and colorectal cancer. There are expected to be almost 66,000 new cases of uterine cancer in 2022.¹ The majority of uterine cancers are endometrioid in histology and tend to be low grade, diagnosed at an early stage, and have a good prognosis. While our molecular understanding of endometrial cancers (EC) has changed significantly in recent years, low-grade endometrioid adenocarcinomas have historically been described as type 1 ECs. Type 1 ECs are typically caused by excess estrogen exposure (often unopposed or lacking progesterone protection) and are preceded by endometrial hyperplasia. Excess estrogen can come from exogenous sources (such as unopposed estrogen replacement therapy or tamoxifen, a commonly used treatment in estrogen receptor–positive breast cancer that acts as an estrogen agonist in the endometrium in postmenopausal patients) or endogenous ones (such as obesity).

Peripheral adipose tissue converts androgens into estrogens; paired with the decreased levels of sex hormone–binding globulin seen in obesity, there is more unbound or free serum estrogen (specifically estradiol) in obese women. Estrogen acts on the endometrium to cause proliferation and, if unopposed or imbalanced in relation to progesterone exposure, can ultimately lead to hyperplasia and malignancy.

Footnote: vaginal estrogen therapy

There are no randomized trials assessing the safety of vaginal estrogen preparations or their effect on oncologic outcomes in EC survivors. Observational data from the Women’s Health Initiative showed no increased risk of endometrial cancer in patients who used vaginal estrogen with an intact uterus.⁴ A recently published retrospective study among 244 gynecologic cancer survivors found low rates of disease recurrence and adverse outcomes among women who used vaginal estrogen for genitourinary symptoms.⁵ Among EC survivors, the incidence of recurrence was 2.4% for patients with stage I/II disease and 4.3% for stage III/IV disease, with a median follow-up of 80.2 months. While there appears to be some systemic absorption with vaginal estrogen use, this can be quite challenging to measure because of the current sensitivity of serum estradiol and estrone assays. Given the significantly lower serum levels with vaginal estrogen preparations compared with ERT, vaginal estrogen use appears to be safe in EC survivors.

Dr. Tucker is assistant professor of gynecologic oncology at the University of North Carolina at Chapel Hill.

References

1. Cancer Stat Facts: Uterine Cancer. National Cancer Institute: Surveillance, Epidemiology, and End Results Program. Accessed 12 Aug. 2022. https://seer.cancer.gov/statfacts/html/corp.html.

2. Barakat RR et al. J Clin Oncol. 2006;24(4):587-92.

3. Shim SH et al. Eur J Cancer. 2014;50(9):1628-37.

4. Crandall CJ et al. Menopause. 2018 Jan;25(1):11-20.

5. Chambers LM et al. Int J Gynecol Cancer. 2020 Apr;30(4):515-24.

In the United States, uterine cancer is the fourth most common cancer among women, behind breast, lung/bronchus, and colorectal cancer. There are expected to be almost 66,000 new cases of uterine cancer in 2022.¹ The majority of uterine cancers are endometrioid in histology and tend to be low grade, diagnosed at an early stage, and have a good prognosis. While our molecular understanding of endometrial cancers (EC) has changed significantly in recent years, low-grade endometrioid adenocarcinomas have historically been described as type 1 ECs. Type 1 ECs are typically caused by excess estrogen exposure (often unopposed or lacking progesterone protection) and are preceded by endometrial hyperplasia. Excess estrogen can come from exogenous sources (such as unopposed estrogen replacement therapy or tamoxifen, a commonly used treatment in estrogen receptor–positive breast cancer that acts as an estrogen agonist in the endometrium in postmenopausal patients) or endogenous ones (such as obesity).

Peripheral adipose tissue converts androgens into estrogens; paired with the decreased levels of sex hormone–binding globulin seen in obesity, there is more unbound or free serum estrogen (specifically estradiol) in obese women. Estrogen acts on the endometrium to cause proliferation and, if unopposed or imbalanced in relation to progesterone exposure, can ultimately lead to hyperplasia and malignancy.

Footnote: vaginal estrogen therapy

There are no randomized trials assessing the safety of vaginal estrogen preparations or their effect on oncologic outcomes in EC survivors. Observational data from the Women’s Health Initiative showed no increased risk of endometrial cancer in patients who used vaginal estrogen with an intact uterus.⁴ A recently published retrospective study among 244 gynecologic cancer survivors found low rates of disease recurrence and adverse outcomes among women who used vaginal estrogen for genitourinary symptoms.⁵ Among EC survivors, the incidence of recurrence was 2.4% for patients with stage I/II disease and 4.3% for stage III/IV disease, with a median follow-up of 80.2 months. While there appears to be some systemic absorption with vaginal estrogen use, this can be quite challenging to measure because of the current sensitivity of serum estradiol and estrone assays. Given the significantly lower serum levels with vaginal estrogen preparations compared with ERT, vaginal estrogen use appears to be safe in EC survivors.

Dr. Tucker is assistant professor of gynecologic oncology at the University of North Carolina at Chapel Hill.

References

1. Cancer Stat Facts: Uterine Cancer. National Cancer Institute: Surveillance, Epidemiology, and End Results Program. Accessed 12 Aug. 2022. https://seer.cancer.gov/statfacts/html/corp.html.

2. Barakat RR et al. J Clin Oncol. 2006;24(4):587-92.

3. Shim SH et al. Eur J Cancer. 2014;50(9):1628-37.

4. Crandall CJ et al. Menopause. 2018 Jan;25(1):11-20.

5. Chambers LM et al. Int J Gynecol Cancer. 2020 Apr;30(4):515-24.

In the United States, uterine cancer is the fourth most common cancer among women, behind breast, lung/bronchus, and colorectal cancer. There are expected to be almost 66,000 new cases of uterine cancer in 2022.¹ The majority of uterine cancers are endometrioid in histology and tend to be low grade, diagnosed at an early stage, and have a good prognosis. While our molecular understanding of endometrial cancers (EC) has changed significantly in recent years, low-grade endometrioid adenocarcinomas have historically been described as type 1 ECs. Type 1 ECs are typically caused by excess estrogen exposure (often unopposed or lacking progesterone protection) and are preceded by endometrial hyperplasia. Excess estrogen can come from exogenous sources (such as unopposed estrogen replacement therapy or tamoxifen, a commonly used treatment in estrogen receptor–positive breast cancer that acts as an estrogen agonist in the endometrium in postmenopausal patients) or endogenous ones (such as obesity).

Peripheral adipose tissue converts androgens into estrogens; paired with the decreased levels of sex hormone–binding globulin seen in obesity, there is more unbound or free serum estrogen (specifically estradiol) in obese women. Estrogen acts on the endometrium to cause proliferation and, if unopposed or imbalanced in relation to progesterone exposure, can ultimately lead to hyperplasia and malignancy.

Footnote: vaginal estrogen therapy

There are no randomized trials assessing the safety of vaginal estrogen preparations or their effect on oncologic outcomes in EC survivors. Observational data from the Women’s Health Initiative showed no increased risk of endometrial cancer in patients who used vaginal estrogen with an intact uterus.⁴ A recently published retrospective study among 244 gynecologic cancer survivors found low rates of disease recurrence and adverse outcomes among women who used vaginal estrogen for genitourinary symptoms.⁵ Among EC survivors, the incidence of recurrence was 2.4% for patients with stage I/II disease and 4.3% for stage III/IV disease, with a median follow-up of 80.2 months. While there appears to be some systemic absorption with vaginal estrogen use, this can be quite challenging to measure because of the current sensitivity of serum estradiol and estrone assays. Given the significantly lower serum levels with vaginal estrogen preparations compared with ERT, vaginal estrogen use appears to be safe in EC survivors.

Dr. Tucker is assistant professor of gynecologic oncology at the University of North Carolina at Chapel Hill.

References

1. Cancer Stat Facts: Uterine Cancer. National Cancer Institute: Surveillance, Epidemiology, and End Results Program. Accessed 12 Aug. 2022. https://seer.cancer.gov/statfacts/html/corp.html.

2. Barakat RR et al. J Clin Oncol. 2006;24(4):587-92.

3. Shim SH et al. Eur J Cancer. 2014;50(9):1628-37.

4. Crandall CJ et al. Menopause. 2018 Jan;25(1):11-20.

5. Chambers LM et al. Int J Gynecol Cancer. 2020 Apr;30(4):515-24.

Annual prostate cancer screening may be particularly important for Black men, new data suggest.

The data come from a review of 45,834 veterans (aged 55-69 years) who had been diagnosed with prostate cancer. About one-third of these men self-identified as non-Hispanic Black, and the rest were White.

During the study period (2004-2017), 2,465 men (5.4%) died of the disease.

The review found that annual prostate-specific antigen (PSA) screening significantly reduced the risk of dying from prostate cancer among Black men but not White men.

The study was published online in JAMA Oncology.

“These results may be biologically plausible because a shorter screening interval may be valuable for detecting aggressive disease, which is more common in Black men,” say investigators, led by University of California, San Diego, radiation oncology resident Michael Sherer, MD.

“Given that Black men are younger at diagnosis and have worse prostate cancer survival compared with White men,” more intensive screening recommendations “may benefit Black patients,” they write.

The study “conclusions are reasonable,” said Christopher Wallis, MD, PhD, a urologic oncologist at Mount Sinai Hospital in Toronto, when asked for comment.

Annual screening may well have “a greater potential to benefit” Black men, he said. “While we would ideally see randomized data supporting this, those data are unlikely to ever be forthcoming. Thus, this study provides a strong rationale to support the recommendations from many guideline panels (including those from the American Urological Association) that Black men, in the context of shared decision-making, may benefit more from PSA-based prostate cancer screening than the population at large,” he added.

Overall, the findings could help inform screening discussions with Black men, the investigators comments. In its most recent guidance, the U.S. Preventive Services Task Force recommends shared decision-making regarding PSA screening for men aged 55-69 years.
 

Similar screening frequency

For their study, the team reviewed Veterans Health Administration data to assess PSA screening patterns – which they categorized as no screening, less than annual screening, or annual screening – in the 5 years leading up to diagnosis.

They then correlated screening behaviors with the subsequent risk of dying from prostate cancer.

Overall, the reduction in risk of prostate cancer–specific mortality (PCSM) associated with screening was similar among Black men (subdistribution hazard ratio, 0.56; P = .001) and White men (sHR, 0.58; P = .001).

However, on multivariable regression, annual screening, in comparison with some screening, was associated with a significant reduction in the risk of dying from prostate cancer only among Black men (sHR, 0.65; P = .02), not among White men (sHR, 0.91; P = .35).

The cumulative incidence of PCSM among Black men was 4.7% with annual screening but 7.3% with only some screening.

Among White men, the cumulative incidence of PCSM with annual screening was 5.9% vs. 6.9% with less than annual screening.

Screening frequency was similar between Black men and White men. Black men were younger on average (61.8 vs. 63.1 years) and had slightly higher PSA levels at diagnosis but were not more likely to have regional or metastatic disease.

No funding was reported for this study. The investigators have disclosed no relevant financial relationships. Dr. Wallis has received personal fees from Janssen Canada.

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

Annual prostate cancer screening may be particularly important for Black men, new data suggest.

The data come from a review of 45,834 veterans (aged 55-69 years) who had been diagnosed with prostate cancer. About one-third of these men self-identified as non-Hispanic Black, and the rest were White.

During the study period (2004-2017), 2,465 men (5.4%) died of the disease.

The review found that annual prostate-specific antigen (PSA) screening significantly reduced the risk of dying from prostate cancer among Black men but not White men.

The study was published online in JAMA Oncology.

“These results may be biologically plausible because a shorter screening interval may be valuable for detecting aggressive disease, which is more common in Black men,” say investigators, led by University of California, San Diego, radiation oncology resident Michael Sherer, MD.

“Given that Black men are younger at diagnosis and have worse prostate cancer survival compared with White men,” more intensive screening recommendations “may benefit Black patients,” they write.

The study “conclusions are reasonable,” said Christopher Wallis, MD, PhD, a urologic oncologist at Mount Sinai Hospital in Toronto, when asked for comment.

Annual screening may well have “a greater potential to benefit” Black men, he said. “While we would ideally see randomized data supporting this, those data are unlikely to ever be forthcoming. Thus, this study provides a strong rationale to support the recommendations from many guideline panels (including those from the American Urological Association) that Black men, in the context of shared decision-making, may benefit more from PSA-based prostate cancer screening than the population at large,” he added.

Overall, the findings could help inform screening discussions with Black men, the investigators comments. In its most recent guidance, the U.S. Preventive Services Task Force recommends shared decision-making regarding PSA screening for men aged 55-69 years.
 

Similar screening frequency

For their study, the team reviewed Veterans Health Administration data to assess PSA screening patterns – which they categorized as no screening, less than annual screening, or annual screening – in the 5 years leading up to diagnosis.

They then correlated screening behaviors with the subsequent risk of dying from prostate cancer.

Overall, the reduction in risk of prostate cancer–specific mortality (PCSM) associated with screening was similar among Black men (subdistribution hazard ratio, 0.56; P = .001) and White men (sHR, 0.58; P = .001).

However, on multivariable regression, annual screening, in comparison with some screening, was associated with a significant reduction in the risk of dying from prostate cancer only among Black men (sHR, 0.65; P = .02), not among White men (sHR, 0.91; P = .35).

The cumulative incidence of PCSM among Black men was 4.7% with annual screening but 7.3% with only some screening.

Among White men, the cumulative incidence of PCSM with annual screening was 5.9% vs. 6.9% with less than annual screening.

Screening frequency was similar between Black men and White men. Black men were younger on average (61.8 vs. 63.1 years) and had slightly higher PSA levels at diagnosis but were not more likely to have regional or metastatic disease.

No funding was reported for this study. The investigators have disclosed no relevant financial relationships. Dr. Wallis has received personal fees from Janssen Canada.

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

Annual prostate cancer screening may be particularly important for Black men, new data suggest.

The data come from a review of 45,834 veterans (aged 55-69 years) who had been diagnosed with prostate cancer. About one-third of these men self-identified as non-Hispanic Black, and the rest were White.

During the study period (2004-2017), 2,465 men (5.4%) died of the disease.

The review found that annual prostate-specific antigen (PSA) screening significantly reduced the risk of dying from prostate cancer among Black men but not White men.

The study was published online in JAMA Oncology.

“These results may be biologically plausible because a shorter screening interval may be valuable for detecting aggressive disease, which is more common in Black men,” say investigators, led by University of California, San Diego, radiation oncology resident Michael Sherer, MD.

“Given that Black men are younger at diagnosis and have worse prostate cancer survival compared with White men,” more intensive screening recommendations “may benefit Black patients,” they write.

The study “conclusions are reasonable,” said Christopher Wallis, MD, PhD, a urologic oncologist at Mount Sinai Hospital in Toronto, when asked for comment.

Annual screening may well have “a greater potential to benefit” Black men, he said. “While we would ideally see randomized data supporting this, those data are unlikely to ever be forthcoming. Thus, this study provides a strong rationale to support the recommendations from many guideline panels (including those from the American Urological Association) that Black men, in the context of shared decision-making, may benefit more from PSA-based prostate cancer screening than the population at large,” he added.

Overall, the findings could help inform screening discussions with Black men, the investigators comments. In its most recent guidance, the U.S. Preventive Services Task Force recommends shared decision-making regarding PSA screening for men aged 55-69 years.
 

Similar screening frequency

For their study, the team reviewed Veterans Health Administration data to assess PSA screening patterns – which they categorized as no screening, less than annual screening, or annual screening – in the 5 years leading up to diagnosis.

They then correlated screening behaviors with the subsequent risk of dying from prostate cancer.

Overall, the reduction in risk of prostate cancer–specific mortality (PCSM) associated with screening was similar among Black men (subdistribution hazard ratio, 0.56; P = .001) and White men (sHR, 0.58; P = .001).

However, on multivariable regression, annual screening, in comparison with some screening, was associated with a significant reduction in the risk of dying from prostate cancer only among Black men (sHR, 0.65; P = .02), not among White men (sHR, 0.91; P = .35).

The cumulative incidence of PCSM among Black men was 4.7% with annual screening but 7.3% with only some screening.

Among White men, the cumulative incidence of PCSM with annual screening was 5.9% vs. 6.9% with less than annual screening.

Screening frequency was similar between Black men and White men. Black men were younger on average (61.8 vs. 63.1 years) and had slightly higher PSA levels at diagnosis but were not more likely to have regional or metastatic disease.

No funding was reported for this study. The investigators have disclosed no relevant financial relationships. Dr. Wallis has received personal fees from Janssen Canada.

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

2021 bought welcome relief to oncologists, whose incomes generally rose as practices reopened after COVID-19 restrictions were lifted and patients ventured out again, concludes the latest Medscape Oncologist Wealth & Debt Report 2022.

Comparing the findings with those in the larger Medscape Physician Wealth & Debt Report 2022, which surveyed more than 13,000 physicians in 29 specialties, the findings for oncologists show how they compare with those who chose other paths in medicine.

Oncologists’ income rose, on average, by 2% in the past year and now stands at an average of $411,000 annually, up from $403,000 in the 2021 report.

This puts oncologists in the top third of specialties, with plastic surgeons again in the top slot (with average income of $576,000 in 2022).

One-fifth (20%) of oncologists surveyed reported a family worth of more than $5 million, which represents substantial family wealth, the report comments.

However, 22% of oncologists reported that their family net worth was less than $500,000, and another 10% estimated that it to fall between $500,000 and $1 million.

For comparison, the average U.S. family net worth is about $749,000, according to data from the Federal Reserve.
 

Most live ‘within their means’

Most oncologists (94%) and also most (94%) of all of the physicians surveyed said that they live within or below their means.

How does one do this? Just paying off credit cards each month and contributing enough to a 401(k) account to receive an employer match does not meet this standard, said Joel Greenwald MD, CFP, a wealth management advisor for physicians. To live within or below your means, you also need to be saving at least 20% toward retirement, pay down student loans, contribute to your kids’ college savings, and set aside rainy day cash, he explained.

When physicians were asked about their favorite cost-cutting tactics, replies included bringing lunch to work, keeping a car for 15 years, and carrying out their own household maintenance and repairs. One doctor described a “24-hour rule” when it comes to shopping: “Revisit the desired purchase after 24 hours to see if it’s still desired.”

But how well do these tactics go down with ‘the other half’ and the rest of the household? Two-thirds (66%) of oncologists, and a similar proportion of all physicians, said that they argue with their significant other about spending. This appears to be high in comparison with the finding from a recent survey that across the United States, about one in four couples (25%) argue about money at least once a month.

Regarding spending, the top expense among oncologists was for childcare (16%), private tuition for offspring (14%), mortgage on a second home (14%), college tuition for offspring (14%), and a car lease (12%).

Around 17% of oncologists reported that they are still paying off their own college or medical school loans. For this statistic, they are about in the middle of all specialties.

The report notes that freeing oneself from medical school debt is very costly. Physicians in the United States pay an average of $356,000-$440,000, about half of which is interest.
 

Little change over 2021

The COVID pandemic had much less of an impact on physicians than it had on the general population when it comes to keeping up with payments, and most physicians were not affected. Only 3% of oncologists said they fell behind with payments for mortgage; 6% fell behind with payments for other bills.

In comparison, nearly half (46%) of Americans missed one or more payments of rent or mortgage because of COVID, according to a 2021 industry survey.

Over the past year, most oncologists (70%) did not change their spending habits, and only 11% cut expenses by deferring or refinancing loans. Also, most oncologists (75%) avoided major financial loses. Only 8% reported financial losses because of problems at their medical practice.

However, a slightly higher percentage of oncologists reported a stock or company investment that had turned sour in 2022 (37%) in comparison with 2021 (28%).

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

2021 bought welcome relief to oncologists, whose incomes generally rose as practices reopened after COVID-19 restrictions were lifted and patients ventured out again, concludes the latest Medscape Oncologist Wealth & Debt Report 2022.

Comparing the findings with those in the larger Medscape Physician Wealth & Debt Report 2022, which surveyed more than 13,000 physicians in 29 specialties, the findings for oncologists show how they compare with those who chose other paths in medicine.

Oncologists’ income rose, on average, by 2% in the past year and now stands at an average of $411,000 annually, up from $403,000 in the 2021 report.

This puts oncologists in the top third of specialties, with plastic surgeons again in the top slot (with average income of $576,000 in 2022).

One-fifth (20%) of oncologists surveyed reported a family worth of more than $5 million, which represents substantial family wealth, the report comments.

However, 22% of oncologists reported that their family net worth was less than $500,000, and another 10% estimated that it to fall between $500,000 and $1 million.

For comparison, the average U.S. family net worth is about $749,000, according to data from the Federal Reserve.
 

Most live ‘within their means’

Most oncologists (94%) and also most (94%) of all of the physicians surveyed said that they live within or below their means.

How does one do this? Just paying off credit cards each month and contributing enough to a 401(k) account to receive an employer match does not meet this standard, said Joel Greenwald MD, CFP, a wealth management advisor for physicians. To live within or below your means, you also need to be saving at least 20% toward retirement, pay down student loans, contribute to your kids’ college savings, and set aside rainy day cash, he explained.

When physicians were asked about their favorite cost-cutting tactics, replies included bringing lunch to work, keeping a car for 15 years, and carrying out their own household maintenance and repairs. One doctor described a “24-hour rule” when it comes to shopping: “Revisit the desired purchase after 24 hours to see if it’s still desired.”

But how well do these tactics go down with ‘the other half’ and the rest of the household? Two-thirds (66%) of oncologists, and a similar proportion of all physicians, said that they argue with their significant other about spending. This appears to be high in comparison with the finding from a recent survey that across the United States, about one in four couples (25%) argue about money at least once a month.

Regarding spending, the top expense among oncologists was for childcare (16%), private tuition for offspring (14%), mortgage on a second home (14%), college tuition for offspring (14%), and a car lease (12%).

Around 17% of oncologists reported that they are still paying off their own college or medical school loans. For this statistic, they are about in the middle of all specialties.

The report notes that freeing oneself from medical school debt is very costly. Physicians in the United States pay an average of $356,000-$440,000, about half of which is interest.
 

Little change over 2021

The COVID pandemic had much less of an impact on physicians than it had on the general population when it comes to keeping up with payments, and most physicians were not affected. Only 3% of oncologists said they fell behind with payments for mortgage; 6% fell behind with payments for other bills.

In comparison, nearly half (46%) of Americans missed one or more payments of rent or mortgage because of COVID, according to a 2021 industry survey.

Over the past year, most oncologists (70%) did not change their spending habits, and only 11% cut expenses by deferring or refinancing loans. Also, most oncologists (75%) avoided major financial loses. Only 8% reported financial losses because of problems at their medical practice.

However, a slightly higher percentage of oncologists reported a stock or company investment that had turned sour in 2022 (37%) in comparison with 2021 (28%).

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

2021 bought welcome relief to oncologists, whose incomes generally rose as practices reopened after COVID-19 restrictions were lifted and patients ventured out again, concludes the latest Medscape Oncologist Wealth & Debt Report 2022.

Comparing the findings with those in the larger Medscape Physician Wealth & Debt Report 2022, which surveyed more than 13,000 physicians in 29 specialties, the findings for oncologists show how they compare with those who chose other paths in medicine.

Oncologists’ income rose, on average, by 2% in the past year and now stands at an average of $411,000 annually, up from $403,000 in the 2021 report.

This puts oncologists in the top third of specialties, with plastic surgeons again in the top slot (with average income of $576,000 in 2022).

One-fifth (20%) of oncologists surveyed reported a family worth of more than $5 million, which represents substantial family wealth, the report comments.

However, 22% of oncologists reported that their family net worth was less than $500,000, and another 10% estimated that it to fall between $500,000 and $1 million.

For comparison, the average U.S. family net worth is about $749,000, according to data from the Federal Reserve.
 

Most live ‘within their means’

Most oncologists (94%) and also most (94%) of all of the physicians surveyed said that they live within or below their means.

How does one do this? Just paying off credit cards each month and contributing enough to a 401(k) account to receive an employer match does not meet this standard, said Joel Greenwald MD, CFP, a wealth management advisor for physicians. To live within or below your means, you also need to be saving at least 20% toward retirement, pay down student loans, contribute to your kids’ college savings, and set aside rainy day cash, he explained.

When physicians were asked about their favorite cost-cutting tactics, replies included bringing lunch to work, keeping a car for 15 years, and carrying out their own household maintenance and repairs. One doctor described a “24-hour rule” when it comes to shopping: “Revisit the desired purchase after 24 hours to see if it’s still desired.”

But how well do these tactics go down with ‘the other half’ and the rest of the household? Two-thirds (66%) of oncologists, and a similar proportion of all physicians, said that they argue with their significant other about spending. This appears to be high in comparison with the finding from a recent survey that across the United States, about one in four couples (25%) argue about money at least once a month.

Regarding spending, the top expense among oncologists was for childcare (16%), private tuition for offspring (14%), mortgage on a second home (14%), college tuition for offspring (14%), and a car lease (12%).

Around 17% of oncologists reported that they are still paying off their own college or medical school loans. For this statistic, they are about in the middle of all specialties.

The report notes that freeing oneself from medical school debt is very costly. Physicians in the United States pay an average of $356,000-$440,000, about half of which is interest.
 

Little change over 2021

The COVID pandemic had much less of an impact on physicians than it had on the general population when it comes to keeping up with payments, and most physicians were not affected. Only 3% of oncologists said they fell behind with payments for mortgage; 6% fell behind with payments for other bills.

In comparison, nearly half (46%) of Americans missed one or more payments of rent or mortgage because of COVID, according to a 2021 industry survey.

Over the past year, most oncologists (70%) did not change their spending habits, and only 11% cut expenses by deferring or refinancing loans. Also, most oncologists (75%) avoided major financial loses. Only 8% reported financial losses because of problems at their medical practice.

However, a slightly higher percentage of oncologists reported a stock or company investment that had turned sour in 2022 (37%) in comparison with 2021 (28%).

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

The PREDICT score does not seem to be particularly accurate when it comes to estimating overall survival (OS) in patients with HER2-positive early breast cancer who are treated with modern chemotherapy and anti-HER2 targeted therapies. This is the conclusion of an international study published in the journal npj Breast Cancer. The work was supervised by Matteo Lambertini, MD, PhD, an oncologist at the IRCCS San Martino Polyclinic Hospital in Genoa, Italy.

As the authors explain, “PREDICT is a publicly available online tool that helps to predict the individual prognosis of patients with early breast cancer and to show the impact of adjuvant treatments administered after breast cancer surgery.” The tool uses traditional clinical-pathological factors. The authors also point out that the original version of this tool was validated in several datasets of patients with breast cancer. In 2011, it was updated to include HER2 status.

The investigators noted that, although the use of PREDICT is recommended to aid decision-making in the adjuvant setting, its prognostic role in patients with HER2-positive early breast cancer who are treated with modern chemotherapy and anti-HER2 therapies – even trastuzumab-based ones – remains unclear.

Therefore, they decided to analyze PREDICT’s prognostic performance using data extracted from the ALTTO trial, the largest adjuvant study ever conducted in the field of HER2-positive early breast cancer. That trial “represented a unique opportunity to investigate the reliability and prognostic performance of PREDICT in women with HER2-positive disease,” according to the investigators. They went on to specify that ALTTO evaluated adjuvant lapatinib plus trastuzumab vs. trastuzumab alone in 8,381 patients – 2,794 of whom were included in their own analysis.

What the analysis found was that, overall, PREDICT underestimated 5-year OS by 6.7%. The observed 5-year OS was 94.7%, and the predicted 5-year OS was 88.0%.

“The underestimation was consistent across all subgroups, including those according to the type of anti-HER2 therapy. The highest absolute differences were observed for patients with hormone receptor–negative disease, nodal involvement, and large tumor size (13.0%, 15.8%, and 15.3%, respectively),” they wrote. Furthermore, they reported that “the suboptimal performance of this prognostic tool was observed irrespective of type of anti-HER2 treatment, type of chemotherapy regimen, age of the patients at the time of diagnosis, central hormone receptor status, pathological nodal status, and pathological tumor size.”

To potentially explain the reasons for the underestimation of patients’ OS, the authors questioned whether the population used to validate PREDICT accurately mirrored the real-world population of patients with HER2-positive disease treated in the modern era with effective chemotherapy and anti-HER2 targeted therapies. “Moreover, the current standard of care for early breast cancer is even superior to the treatment received by many patients in the ALTTO study. … As such, the discordance between OS estimated by PREDICT and the current real-world OS is expected to be even higher. Therefore,” the researchers concluded, “our results suggest that the current version of PREDICT should be used with caution for prognostication in HER2-positive early breast cancer patients treated in the modern era with effective chemotherapy and anti-HER2 targeted therapies.”

A version of this article first appeared on Medscape.com. This article was translated from Univadis Italy.

The PREDICT score does not seem to be particularly accurate when it comes to estimating overall survival (OS) in patients with HER2-positive early breast cancer who are treated with modern chemotherapy and anti-HER2 targeted therapies. This is the conclusion of an international study published in the journal npj Breast Cancer. The work was supervised by Matteo Lambertini, MD, PhD, an oncologist at the IRCCS San Martino Polyclinic Hospital in Genoa, Italy.

As the authors explain, “PREDICT is a publicly available online tool that helps to predict the individual prognosis of patients with early breast cancer and to show the impact of adjuvant treatments administered after breast cancer surgery.” The tool uses traditional clinical-pathological factors. The authors also point out that the original version of this tool was validated in several datasets of patients with breast cancer. In 2011, it was updated to include HER2 status.

The investigators noted that, although the use of PREDICT is recommended to aid decision-making in the adjuvant setting, its prognostic role in patients with HER2-positive early breast cancer who are treated with modern chemotherapy and anti-HER2 therapies – even trastuzumab-based ones – remains unclear.

Therefore, they decided to analyze PREDICT’s prognostic performance using data extracted from the ALTTO trial, the largest adjuvant study ever conducted in the field of HER2-positive early breast cancer. That trial “represented a unique opportunity to investigate the reliability and prognostic performance of PREDICT in women with HER2-positive disease,” according to the investigators. They went on to specify that ALTTO evaluated adjuvant lapatinib plus trastuzumab vs. trastuzumab alone in 8,381 patients – 2,794 of whom were included in their own analysis.

What the analysis found was that, overall, PREDICT underestimated 5-year OS by 6.7%. The observed 5-year OS was 94.7%, and the predicted 5-year OS was 88.0%.

“The underestimation was consistent across all subgroups, including those according to the type of anti-HER2 therapy. The highest absolute differences were observed for patients with hormone receptor–negative disease, nodal involvement, and large tumor size (13.0%, 15.8%, and 15.3%, respectively),” they wrote. Furthermore, they reported that “the suboptimal performance of this prognostic tool was observed irrespective of type of anti-HER2 treatment, type of chemotherapy regimen, age of the patients at the time of diagnosis, central hormone receptor status, pathological nodal status, and pathological tumor size.”

To potentially explain the reasons for the underestimation of patients’ OS, the authors questioned whether the population used to validate PREDICT accurately mirrored the real-world population of patients with HER2-positive disease treated in the modern era with effective chemotherapy and anti-HER2 targeted therapies. “Moreover, the current standard of care for early breast cancer is even superior to the treatment received by many patients in the ALTTO study. … As such, the discordance between OS estimated by PREDICT and the current real-world OS is expected to be even higher. Therefore,” the researchers concluded, “our results suggest that the current version of PREDICT should be used with caution for prognostication in HER2-positive early breast cancer patients treated in the modern era with effective chemotherapy and anti-HER2 targeted therapies.”

A version of this article first appeared on Medscape.com. This article was translated from Univadis Italy.

The PREDICT score does not seem to be particularly accurate when it comes to estimating overall survival (OS) in patients with HER2-positive early breast cancer who are treated with modern chemotherapy and anti-HER2 targeted therapies. This is the conclusion of an international study published in the journal npj Breast Cancer. The work was supervised by Matteo Lambertini, MD, PhD, an oncologist at the IRCCS San Martino Polyclinic Hospital in Genoa, Italy.

As the authors explain, “PREDICT is a publicly available online tool that helps to predict the individual prognosis of patients with early breast cancer and to show the impact of adjuvant treatments administered after breast cancer surgery.” The tool uses traditional clinical-pathological factors. The authors also point out that the original version of this tool was validated in several datasets of patients with breast cancer. In 2011, it was updated to include HER2 status.

The investigators noted that, although the use of PREDICT is recommended to aid decision-making in the adjuvant setting, its prognostic role in patients with HER2-positive early breast cancer who are treated with modern chemotherapy and anti-HER2 therapies – even trastuzumab-based ones – remains unclear.

Therefore, they decided to analyze PREDICT’s prognostic performance using data extracted from the ALTTO trial, the largest adjuvant study ever conducted in the field of HER2-positive early breast cancer. That trial “represented a unique opportunity to investigate the reliability and prognostic performance of PREDICT in women with HER2-positive disease,” according to the investigators. They went on to specify that ALTTO evaluated adjuvant lapatinib plus trastuzumab vs. trastuzumab alone in 8,381 patients – 2,794 of whom were included in their own analysis.

What the analysis found was that, overall, PREDICT underestimated 5-year OS by 6.7%. The observed 5-year OS was 94.7%, and the predicted 5-year OS was 88.0%.

“The underestimation was consistent across all subgroups, including those according to the type of anti-HER2 therapy. The highest absolute differences were observed for patients with hormone receptor–negative disease, nodal involvement, and large tumor size (13.0%, 15.8%, and 15.3%, respectively),” they wrote. Furthermore, they reported that “the suboptimal performance of this prognostic tool was observed irrespective of type of anti-HER2 treatment, type of chemotherapy regimen, age of the patients at the time of diagnosis, central hormone receptor status, pathological nodal status, and pathological tumor size.”

To potentially explain the reasons for the underestimation of patients’ OS, the authors questioned whether the population used to validate PREDICT accurately mirrored the real-world population of patients with HER2-positive disease treated in the modern era with effective chemotherapy and anti-HER2 targeted therapies. “Moreover, the current standard of care for early breast cancer is even superior to the treatment received by many patients in the ALTTO study. … As such, the discordance between OS estimated by PREDICT and the current real-world OS is expected to be even higher. Therefore,” the researchers concluded, “our results suggest that the current version of PREDICT should be used with caution for prognostication in HER2-positive early breast cancer patients treated in the modern era with effective chemotherapy and anti-HER2 targeted therapies.”

A version of this article first appeared on Medscape.com. This article was translated from Univadis Italy.

Lung cancer has been the leading cause of cancer-related mortality for decades. It is also predicted to remain as the leading cause of cancer-related mortality through 2030.¹ Platinum-based chemotherapy, including carboplatin and paclitaxel, was introduced 3 decades ago and revolutionized the management of advanced non–small cell lung cancer (NSCLC). A more recent advancement has been mutant epidermal growth factor receptor–tyrosine kinase (EGFR-TK) inhibitors.¹ EGFR is a transmembrane protein that functions by transducing essential growth factor signaling from the extracellular milieu to the cell. As 60% of the advanced NSCLC expresses this receptor, blocking the mutant EGFR receptor was a groundbreaking development in the management of advanced NSCLC.² Development of mutant EGFR-TK inhibitors has revolutionized the management of advanced NSCLC. This study was conducted to determine the safety profile of mutant EGFR-TK inhibitors in the management of advanced NSCLC.

Methods 

This meta-analysis was conducted according to Cochrane Collaboration guidelines and reported as per Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The findings are summarized in the PRISMA flow diagram (Figure 1). Two authors (MZ and MM) performed a systematic literature search using databases such as MEDLINE (via PubMed), Embase, and Cochrane Library using the medical search terms and their respective entry words with the following search strategy: safety, “mutant EGFR-TK inhibitors,” advanced, “non–small cell,” “lung cancer,” “adverse effect,” and literature. Additionally, unpublished trials were identified from clinicaltrials.gov, and references of all pertinent articles were also scrutinized to ensure the inclusion of all relevant studies. The search was completed on June 1, 2021, and we only included studies available in English. Two authors (MM and MZ) independently screened the search results in a 2-step process based on predetermined inclusion/exclusion criteria. First, 890 articles were evaluated for relevance on title and abstract level, followed by full-text screening of the final list of 140 articles. Any disagreements were resolved by discussion or third-party review, and a total of 9 articles were included in the study.

The following eligibility criteria were used: original articles reporting adverse effects (AEs) of mutant EGFR-TK inhibitors in patients with advanced NSCLC compared with control groups receiving platinum-based chemotherapy. All the patients included in the study had an EGFR mutation but randomly assigned to either treatment or control group. All articles with subjective data on mutant EGFR-TK inhibitors AEs in patients with advanced NSCLC compared with control groups receiving platinum-based chemotherapy were included in the analysis. Only 9 articles qualified the aforementioned selection criteria for eligibility. All qualifying studies were nationwide inpatient or pooled clinical trials data. The reasons for exclusion of the other 71 articles were irrelevant (n = 31), duplicate (n = 13), reviews (n = 14), and poor data reporting (n = 12). Out of the 9 included studies, 9 studies showed correlation of AEs, including rash, diarrhea, nausea, and fatigue. Seven studies showed correlation of AEs including neutropenia, anorexia, and vomiting. Six studies showed correlation of anemia, cough, and stomatitis. Five studies showed correlation of elevated aspartate aminotransferase (AST), alanine aminotransferase (ALT), and leucopenia. Four studies showed correlation of fever between mutant EGFR-TK inhibitors and platinum-based chemotherapy.

The primary endpoints were reported AEs including rash, diarrhea, elevated ALT, elevated AST, stomatitis, nausea, leucopenia, fatigue, neutropenia, anorexia, anemia, cough, vomiting, and fever, respectively. Data on baseline characteristics and clinical outcomes were then extracted, and summary tables were created. Summary estimates of the clinical endpoints were then calculated with risk ratio (RR) and 95% confidence intervals (CIs) using the random-effects model. Heterogeneity between studies was examined with the Cochran Q I² statistic which can be defined as low (25% to 50%), moderate (50% to 75%), or high (> 75%). Statistical analysis was performed using Comprehensive Meta-Analysis Software CMA Version 3.0.

Results

A total of 9 studies including 3415 patients (1775 in EGFR-TK inhibitor treatment group while 1640 patients in platinum-based chemotherapy control group) were included in the study. All 9 studies were phase III randomized control clinical trials conducted to compare the safety profile of mutant EGFR-TK inhibitors in patients with advanced NSCLC. Mean age was 61 years in both treatment and control groups. Further details on study and participant characteristics and safety profile including AEs are summarized in Tables 1 and 2. No evidence of publication bias was found.

Rash developed in 45.8% of patients in the treatment group receiving mutant EGFR-TK inhibitors vs only 5.6% of patients in the control group receiving platinum-based chemotherapy. Overall RR of 7.38 with the 95% CI noted, which was statistically significant, confirming higher rash event rates in patients receiving EGFR-TK inhibitors for their advanced NSCLC (Figure 2).

Diarrhea occurred in 33.6% of patients in the mutant EGFR-TK inhibitors treatment group vs 13.5% of patients in the control group receiving platinum-based chemotherapy. Overall RR of 2.63 and 95% CI was noted, which was statistically significant, confirming higher diarrheal rates in patients receiving EGFR-TK inhibitors for their advanced NSCLC (Figure 3).

Discussion

Despite the advancement in the treatment of metastatic NSCLC, lung cancer stays as most common cause of cancer-related death in North America and European countries, as patients usually have an advanced disease at the time of diagnosis.³ In the past, platinum-based chemotherapy remained the standard of care for most of the patients affected with advanced NSCLC, but the higher recurrence rate and increase in frequency and intensity of AEs with platinum-based chemotherapy led to the development of targeted therapy for NSCLC, one of which includes mutant EGFR-TK inhibitors, including erlotinib, gefitinib, dacomitinib, lapatinib, and osimertinib.⁴

Smoking is the most common reversible risk factor associated with lung cancer. The EURTAC trial was the first perspective study in this regard, which compared safety and efficacy of mutant EGFR-TK inhibitors with platinum-based chemotherapy. Results analyzed in this study were in favor of mutant EGFR-TK inhibitors except in the group of former smokers.⁵ On the contrary, the OPTIMAL trial showed results in favor of mutant EGFR-TK inhibitors both in active and former smokers; this trial also confirmed the efficacy of mutant EGFR-TK inhibitors in European and Asian populations, confirming the rationale for routine testing of EGFR mutation in all the patients being diagnosed with advanced NSCLC.⁶ Similarly, osimertinib is one of the most recent mutant EGFR-TK inhibitors developed for the treatment of advanced NSCLC in patients with EGFR-positive receptors.

According to the FLAURA trial, patients receiving osimertinib showed significantly longer progression-free survival compared with platinum-based chemotherapy and early mutant EGFR-TK inhibitors. Median progression-free survival was noted to be 18.9 months, which showed 54% lower risk of disease progression in the treatment group receiving osimertinib.⁷ The ARCHER study emphasized a significant improvement in overall survival as well as progression-free survival among a patient population receiving dacomitinib compared with platinum-based chemotherapy.^8,9

Being a potent targeted therapy, mutant EGFR-TK inhibitors do come with some AEs including diarrhea, which was seen in 33.6% of the patients receiving mutant EGFR-TK inhibitors in our study vs 53% in the chemotherapy group, as was observed in the study conducted by Pless and colleagues.¹⁰ Similarly, only 16.5% of patients receiving mutant EGFR-TK inhibitors developed nausea compared with 66% being observed in patients receiving chemotherapy. Correspondingly, only a small fraction of patients (9.7%) receiving mutant EGFR-TK inhibitors developed leucopenia, which was 10 times less reported in mutant EGFR-TK inhibitors compared with patients receiving chemotherapy having a percentage of 100%. A similar trend was reported for neutropenia and anemia in mutant EGFR-TK inhibitors with an incidence of 6.1% and 8.7%, compared with the platinum-based chemotherapy group in which the incidence was found to be 80% and 100%, respectively. It was concluded that platinum-based chemotherapy had played a vital role in the treatment of advanced NSCLC but at an expense of serious and severe AEs which led to discontinuation or withdrawal of treatment, leading to relapse and recurrence of lung cancer.^10,11

Zhong and colleagues conducted a phase 2 randomized clinical trial comparing mutant EGFR-TK inhibitors with platinum-based chemotherapy. They concluded that in patients receiving platinum-based chemotherapy, incidence of rash, vomiting, anorexia, neutropenia, and nausea were 29.4%, 47%, 41.2%, 55.8%, and 32.4% compared with 45.8%, 11%, 21.3%, 6.1%, and 16.5%, respectively, reported in patients receiving mutant EGFR-TK inhibitors for their advanced NSCLC.¹²

Another study was conducted in 2019 by Noronha and colleagues to determine the impact of platinum-based chemotherapy combined with gefitinib on patients with advanced NSCLC.¹³ They concluded that 70% of the patients receiving combination treatment developed rash, which was significantly higher compared with 45.8% patients receiving the mutant EGFR-TK inhibitors alone in our study. Also, 56% of patients receiving combination therapy developed diarrhea vs 33.6% of patients receiving mutant EGFR-TK inhibitors only. Similarly, 96% of patients in the combination therapy group developed some degree of anemia compared with only 8.7% patients in the mutant EGFR-TK inhibitors group included in our study. In the same way, neutropenia was observed in 55% of patients receiving combination therapy vs 6.1% in patients receiving mutant EGFR-TK inhibitors solely. They concluded that mutant EGFR-TK inhibitors when combined with platinum-based chemotherapy increase the incidence of AEs of chemotherapy by many folds.^13,14

Kato and colleagues conducted a study to determine the impact on AEs when erlotinib was combined with anti–vascular endothelial growth factor (VEGF) inhibitors like bevacizumab, they stated that 98.7% of patient in combination therapy developed rash, the incidence of which was only 45.8% in patients receiving mutant EGFR-TK inhibitors as was observed in our study. Similar trends were noticed with other AEs, including diarrhea, fatigue, nausea, and elevated liver enzymes.¹⁵

Conclusions

Our study focused on the safety profile of mutant EGFR-TK inhibitors vs platinum-based chemotherapy in the treatment of advanced NSCLC. Mutant EGFR-TK inhibitors are safer than platinum-based chemotherapy when compared for nausea, leucopenia, fatigue, neutropenia, anorexia, anemia, cough, vomiting, and fever. On the other end, mutant EGFR-TK inhibitors cause slightly higher AEs, including rash, diarrhea, elevated AST and ALT levels, and stomatitis. However, considering that the development of mutant EGFR-TK inhibitors laid a foundation of targeted therapy, we recommend continuing using mutant EGFR-TK inhibitors in patients with advanced NSCLC especially in patients having mutant EGFR receptors. AEs caused by mutant EGFR-TK inhibitors are significant but are usually tolerable and can be avoided by reducing the dosage of it with each cycle or by skipping or delaying the dose until the patient is symptomatic.

Lung cancer has been the leading cause of cancer-related mortality for decades. It is also predicted to remain as the leading cause of cancer-related mortality through 2030.¹ Platinum-based chemotherapy, including carboplatin and paclitaxel, was introduced 3 decades ago and revolutionized the management of advanced non–small cell lung cancer (NSCLC). A more recent advancement has been mutant epidermal growth factor receptor–tyrosine kinase (EGFR-TK) inhibitors.¹ EGFR is a transmembrane protein that functions by transducing essential growth factor signaling from the extracellular milieu to the cell. As 60% of the advanced NSCLC expresses this receptor, blocking the mutant EGFR receptor was a groundbreaking development in the management of advanced NSCLC.² Development of mutant EGFR-TK inhibitors has revolutionized the management of advanced NSCLC. This study was conducted to determine the safety profile of mutant EGFR-TK inhibitors in the management of advanced NSCLC.

Methods 

This meta-analysis was conducted according to Cochrane Collaboration guidelines and reported as per Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The findings are summarized in the PRISMA flow diagram (Figure 1). Two authors (MZ and MM) performed a systematic literature search using databases such as MEDLINE (via PubMed), Embase, and Cochrane Library using the medical search terms and their respective entry words with the following search strategy: safety, “mutant EGFR-TK inhibitors,” advanced, “non–small cell,” “lung cancer,” “adverse effect,” and literature. Additionally, unpublished trials were identified from clinicaltrials.gov, and references of all pertinent articles were also scrutinized to ensure the inclusion of all relevant studies. The search was completed on June 1, 2021, and we only included studies available in English. Two authors (MM and MZ) independently screened the search results in a 2-step process based on predetermined inclusion/exclusion criteria. First, 890 articles were evaluated for relevance on title and abstract level, followed by full-text screening of the final list of 140 articles. Any disagreements were resolved by discussion or third-party review, and a total of 9 articles were included in the study.

The following eligibility criteria were used: original articles reporting adverse effects (AEs) of mutant EGFR-TK inhibitors in patients with advanced NSCLC compared with control groups receiving platinum-based chemotherapy. All the patients included in the study had an EGFR mutation but randomly assigned to either treatment or control group. All articles with subjective data on mutant EGFR-TK inhibitors AEs in patients with advanced NSCLC compared with control groups receiving platinum-based chemotherapy were included in the analysis. Only 9 articles qualified the aforementioned selection criteria for eligibility. All qualifying studies were nationwide inpatient or pooled clinical trials data. The reasons for exclusion of the other 71 articles were irrelevant (n = 31), duplicate (n = 13), reviews (n = 14), and poor data reporting (n = 12). Out of the 9 included studies, 9 studies showed correlation of AEs, including rash, diarrhea, nausea, and fatigue. Seven studies showed correlation of AEs including neutropenia, anorexia, and vomiting. Six studies showed correlation of anemia, cough, and stomatitis. Five studies showed correlation of elevated aspartate aminotransferase (AST), alanine aminotransferase (ALT), and leucopenia. Four studies showed correlation of fever between mutant EGFR-TK inhibitors and platinum-based chemotherapy.

The primary endpoints were reported AEs including rash, diarrhea, elevated ALT, elevated AST, stomatitis, nausea, leucopenia, fatigue, neutropenia, anorexia, anemia, cough, vomiting, and fever, respectively. Data on baseline characteristics and clinical outcomes were then extracted, and summary tables were created. Summary estimates of the clinical endpoints were then calculated with risk ratio (RR) and 95% confidence intervals (CIs) using the random-effects model. Heterogeneity between studies was examined with the Cochran Q I² statistic which can be defined as low (25% to 50%), moderate (50% to 75%), or high (> 75%). Statistical analysis was performed using Comprehensive Meta-Analysis Software CMA Version 3.0.

Results

A total of 9 studies including 3415 patients (1775 in EGFR-TK inhibitor treatment group while 1640 patients in platinum-based chemotherapy control group) were included in the study. All 9 studies were phase III randomized control clinical trials conducted to compare the safety profile of mutant EGFR-TK inhibitors in patients with advanced NSCLC. Mean age was 61 years in both treatment and control groups. Further details on study and participant characteristics and safety profile including AEs are summarized in Tables 1 and 2. No evidence of publication bias was found.

Rash developed in 45.8% of patients in the treatment group receiving mutant EGFR-TK inhibitors vs only 5.6% of patients in the control group receiving platinum-based chemotherapy. Overall RR of 7.38 with the 95% CI noted, which was statistically significant, confirming higher rash event rates in patients receiving EGFR-TK inhibitors for their advanced NSCLC (Figure 2).

Diarrhea occurred in 33.6% of patients in the mutant EGFR-TK inhibitors treatment group vs 13.5% of patients in the control group receiving platinum-based chemotherapy. Overall RR of 2.63 and 95% CI was noted, which was statistically significant, confirming higher diarrheal rates in patients receiving EGFR-TK inhibitors for their advanced NSCLC (Figure 3).

Discussion

Despite the advancement in the treatment of metastatic NSCLC, lung cancer stays as most common cause of cancer-related death in North America and European countries, as patients usually have an advanced disease at the time of diagnosis.³ In the past, platinum-based chemotherapy remained the standard of care for most of the patients affected with advanced NSCLC, but the higher recurrence rate and increase in frequency and intensity of AEs with platinum-based chemotherapy led to the development of targeted therapy for NSCLC, one of which includes mutant EGFR-TK inhibitors, including erlotinib, gefitinib, dacomitinib, lapatinib, and osimertinib.⁴

Smoking is the most common reversible risk factor associated with lung cancer. The EURTAC trial was the first perspective study in this regard, which compared safety and efficacy of mutant EGFR-TK inhibitors with platinum-based chemotherapy. Results analyzed in this study were in favor of mutant EGFR-TK inhibitors except in the group of former smokers.⁵ On the contrary, the OPTIMAL trial showed results in favor of mutant EGFR-TK inhibitors both in active and former smokers; this trial also confirmed the efficacy of mutant EGFR-TK inhibitors in European and Asian populations, confirming the rationale for routine testing of EGFR mutation in all the patients being diagnosed with advanced NSCLC.⁶ Similarly, osimertinib is one of the most recent mutant EGFR-TK inhibitors developed for the treatment of advanced NSCLC in patients with EGFR-positive receptors.

According to the FLAURA trial, patients receiving osimertinib showed significantly longer progression-free survival compared with platinum-based chemotherapy and early mutant EGFR-TK inhibitors. Median progression-free survival was noted to be 18.9 months, which showed 54% lower risk of disease progression in the treatment group receiving osimertinib.⁷ The ARCHER study emphasized a significant improvement in overall survival as well as progression-free survival among a patient population receiving dacomitinib compared with platinum-based chemotherapy.^8,9

Being a potent targeted therapy, mutant EGFR-TK inhibitors do come with some AEs including diarrhea, which was seen in 33.6% of the patients receiving mutant EGFR-TK inhibitors in our study vs 53% in the chemotherapy group, as was observed in the study conducted by Pless and colleagues.¹⁰ Similarly, only 16.5% of patients receiving mutant EGFR-TK inhibitors developed nausea compared with 66% being observed in patients receiving chemotherapy. Correspondingly, only a small fraction of patients (9.7%) receiving mutant EGFR-TK inhibitors developed leucopenia, which was 10 times less reported in mutant EGFR-TK inhibitors compared with patients receiving chemotherapy having a percentage of 100%. A similar trend was reported for neutropenia and anemia in mutant EGFR-TK inhibitors with an incidence of 6.1% and 8.7%, compared with the platinum-based chemotherapy group in which the incidence was found to be 80% and 100%, respectively. It was concluded that platinum-based chemotherapy had played a vital role in the treatment of advanced NSCLC but at an expense of serious and severe AEs which led to discontinuation or withdrawal of treatment, leading to relapse and recurrence of lung cancer.^10,11

Zhong and colleagues conducted a phase 2 randomized clinical trial comparing mutant EGFR-TK inhibitors with platinum-based chemotherapy. They concluded that in patients receiving platinum-based chemotherapy, incidence of rash, vomiting, anorexia, neutropenia, and nausea were 29.4%, 47%, 41.2%, 55.8%, and 32.4% compared with 45.8%, 11%, 21.3%, 6.1%, and 16.5%, respectively, reported in patients receiving mutant EGFR-TK inhibitors for their advanced NSCLC.¹²

Another study was conducted in 2019 by Noronha and colleagues to determine the impact of platinum-based chemotherapy combined with gefitinib on patients with advanced NSCLC.¹³ They concluded that 70% of the patients receiving combination treatment developed rash, which was significantly higher compared with 45.8% patients receiving the mutant EGFR-TK inhibitors alone in our study. Also, 56% of patients receiving combination therapy developed diarrhea vs 33.6% of patients receiving mutant EGFR-TK inhibitors only. Similarly, 96% of patients in the combination therapy group developed some degree of anemia compared with only 8.7% patients in the mutant EGFR-TK inhibitors group included in our study. In the same way, neutropenia was observed in 55% of patients receiving combination therapy vs 6.1% in patients receiving mutant EGFR-TK inhibitors solely. They concluded that mutant EGFR-TK inhibitors when combined with platinum-based chemotherapy increase the incidence of AEs of chemotherapy by many folds.^13,14

Kato and colleagues conducted a study to determine the impact on AEs when erlotinib was combined with anti–vascular endothelial growth factor (VEGF) inhibitors like bevacizumab, they stated that 98.7% of patient in combination therapy developed rash, the incidence of which was only 45.8% in patients receiving mutant EGFR-TK inhibitors as was observed in our study. Similar trends were noticed with other AEs, including diarrhea, fatigue, nausea, and elevated liver enzymes.¹⁵

Conclusions

Our study focused on the safety profile of mutant EGFR-TK inhibitors vs platinum-based chemotherapy in the treatment of advanced NSCLC. Mutant EGFR-TK inhibitors are safer than platinum-based chemotherapy when compared for nausea, leucopenia, fatigue, neutropenia, anorexia, anemia, cough, vomiting, and fever. On the other end, mutant EGFR-TK inhibitors cause slightly higher AEs, including rash, diarrhea, elevated AST and ALT levels, and stomatitis. However, considering that the development of mutant EGFR-TK inhibitors laid a foundation of targeted therapy, we recommend continuing using mutant EGFR-TK inhibitors in patients with advanced NSCLC especially in patients having mutant EGFR receptors. AEs caused by mutant EGFR-TK inhibitors are significant but are usually tolerable and can be avoided by reducing the dosage of it with each cycle or by skipping or delaying the dose until the patient is symptomatic.

Lung cancer has been the leading cause of cancer-related mortality for decades. It is also predicted to remain as the leading cause of cancer-related mortality through 2030.¹ Platinum-based chemotherapy, including carboplatin and paclitaxel, was introduced 3 decades ago and revolutionized the management of advanced non–small cell lung cancer (NSCLC). A more recent advancement has been mutant epidermal growth factor receptor–tyrosine kinase (EGFR-TK) inhibitors.¹ EGFR is a transmembrane protein that functions by transducing essential growth factor signaling from the extracellular milieu to the cell. As 60% of the advanced NSCLC expresses this receptor, blocking the mutant EGFR receptor was a groundbreaking development in the management of advanced NSCLC.² Development of mutant EGFR-TK inhibitors has revolutionized the management of advanced NSCLC. This study was conducted to determine the safety profile of mutant EGFR-TK inhibitors in the management of advanced NSCLC.

Methods 

This meta-analysis was conducted according to Cochrane Collaboration guidelines and reported as per Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The findings are summarized in the PRISMA flow diagram (Figure 1). Two authors (MZ and MM) performed a systematic literature search using databases such as MEDLINE (via PubMed), Embase, and Cochrane Library using the medical search terms and their respective entry words with the following search strategy: safety, “mutant EGFR-TK inhibitors,” advanced, “non–small cell,” “lung cancer,” “adverse effect,” and literature. Additionally, unpublished trials were identified from clinicaltrials.gov, and references of all pertinent articles were also scrutinized to ensure the inclusion of all relevant studies. The search was completed on June 1, 2021, and we only included studies available in English. Two authors (MM and MZ) independently screened the search results in a 2-step process based on predetermined inclusion/exclusion criteria. First, 890 articles were evaluated for relevance on title and abstract level, followed by full-text screening of the final list of 140 articles. Any disagreements were resolved by discussion or third-party review, and a total of 9 articles were included in the study.

The following eligibility criteria were used: original articles reporting adverse effects (AEs) of mutant EGFR-TK inhibitors in patients with advanced NSCLC compared with control groups receiving platinum-based chemotherapy. All the patients included in the study had an EGFR mutation but randomly assigned to either treatment or control group. All articles with subjective data on mutant EGFR-TK inhibitors AEs in patients with advanced NSCLC compared with control groups receiving platinum-based chemotherapy were included in the analysis. Only 9 articles qualified the aforementioned selection criteria for eligibility. All qualifying studies were nationwide inpatient or pooled clinical trials data. The reasons for exclusion of the other 71 articles were irrelevant (n = 31), duplicate (n = 13), reviews (n = 14), and poor data reporting (n = 12). Out of the 9 included studies, 9 studies showed correlation of AEs, including rash, diarrhea, nausea, and fatigue. Seven studies showed correlation of AEs including neutropenia, anorexia, and vomiting. Six studies showed correlation of anemia, cough, and stomatitis. Five studies showed correlation of elevated aspartate aminotransferase (AST), alanine aminotransferase (ALT), and leucopenia. Four studies showed correlation of fever between mutant EGFR-TK inhibitors and platinum-based chemotherapy.

The primary endpoints were reported AEs including rash, diarrhea, elevated ALT, elevated AST, stomatitis, nausea, leucopenia, fatigue, neutropenia, anorexia, anemia, cough, vomiting, and fever, respectively. Data on baseline characteristics and clinical outcomes were then extracted, and summary tables were created. Summary estimates of the clinical endpoints were then calculated with risk ratio (RR) and 95% confidence intervals (CIs) using the random-effects model. Heterogeneity between studies was examined with the Cochran Q I² statistic which can be defined as low (25% to 50%), moderate (50% to 75%), or high (> 75%). Statistical analysis was performed using Comprehensive Meta-Analysis Software CMA Version 3.0.

Results

A total of 9 studies including 3415 patients (1775 in EGFR-TK inhibitor treatment group while 1640 patients in platinum-based chemotherapy control group) were included in the study. All 9 studies were phase III randomized control clinical trials conducted to compare the safety profile of mutant EGFR-TK inhibitors in patients with advanced NSCLC. Mean age was 61 years in both treatment and control groups. Further details on study and participant characteristics and safety profile including AEs are summarized in Tables 1 and 2. No evidence of publication bias was found.

Rash developed in 45.8% of patients in the treatment group receiving mutant EGFR-TK inhibitors vs only 5.6% of patients in the control group receiving platinum-based chemotherapy. Overall RR of 7.38 with the 95% CI noted, which was statistically significant, confirming higher rash event rates in patients receiving EGFR-TK inhibitors for their advanced NSCLC (Figure 2).

Diarrhea occurred in 33.6% of patients in the mutant EGFR-TK inhibitors treatment group vs 13.5% of patients in the control group receiving platinum-based chemotherapy. Overall RR of 2.63 and 95% CI was noted, which was statistically significant, confirming higher diarrheal rates in patients receiving EGFR-TK inhibitors for their advanced NSCLC (Figure 3).

Discussion

Despite the advancement in the treatment of metastatic NSCLC, lung cancer stays as most common cause of cancer-related death in North America and European countries, as patients usually have an advanced disease at the time of diagnosis.³ In the past, platinum-based chemotherapy remained the standard of care for most of the patients affected with advanced NSCLC, but the higher recurrence rate and increase in frequency and intensity of AEs with platinum-based chemotherapy led to the development of targeted therapy for NSCLC, one of which includes mutant EGFR-TK inhibitors, including erlotinib, gefitinib, dacomitinib, lapatinib, and osimertinib.⁴

Smoking is the most common reversible risk factor associated with lung cancer. The EURTAC trial was the first perspective study in this regard, which compared safety and efficacy of mutant EGFR-TK inhibitors with platinum-based chemotherapy. Results analyzed in this study were in favor of mutant EGFR-TK inhibitors except in the group of former smokers.⁵ On the contrary, the OPTIMAL trial showed results in favor of mutant EGFR-TK inhibitors both in active and former smokers; this trial also confirmed the efficacy of mutant EGFR-TK inhibitors in European and Asian populations, confirming the rationale for routine testing of EGFR mutation in all the patients being diagnosed with advanced NSCLC.⁶ Similarly, osimertinib is one of the most recent mutant EGFR-TK inhibitors developed for the treatment of advanced NSCLC in patients with EGFR-positive receptors.

According to the FLAURA trial, patients receiving osimertinib showed significantly longer progression-free survival compared with platinum-based chemotherapy and early mutant EGFR-TK inhibitors. Median progression-free survival was noted to be 18.9 months, which showed 54% lower risk of disease progression in the treatment group receiving osimertinib.⁷ The ARCHER study emphasized a significant improvement in overall survival as well as progression-free survival among a patient population receiving dacomitinib compared with platinum-based chemotherapy.^8,9

Being a potent targeted therapy, mutant EGFR-TK inhibitors do come with some AEs including diarrhea, which was seen in 33.6% of the patients receiving mutant EGFR-TK inhibitors in our study vs 53% in the chemotherapy group, as was observed in the study conducted by Pless and colleagues.¹⁰ Similarly, only 16.5% of patients receiving mutant EGFR-TK inhibitors developed nausea compared with 66% being observed in patients receiving chemotherapy. Correspondingly, only a small fraction of patients (9.7%) receiving mutant EGFR-TK inhibitors developed leucopenia, which was 10 times less reported in mutant EGFR-TK inhibitors compared with patients receiving chemotherapy having a percentage of 100%. A similar trend was reported for neutropenia and anemia in mutant EGFR-TK inhibitors with an incidence of 6.1% and 8.7%, compared with the platinum-based chemotherapy group in which the incidence was found to be 80% and 100%, respectively. It was concluded that platinum-based chemotherapy had played a vital role in the treatment of advanced NSCLC but at an expense of serious and severe AEs which led to discontinuation or withdrawal of treatment, leading to relapse and recurrence of lung cancer.^10,11

Zhong and colleagues conducted a phase 2 randomized clinical trial comparing mutant EGFR-TK inhibitors with platinum-based chemotherapy. They concluded that in patients receiving platinum-based chemotherapy, incidence of rash, vomiting, anorexia, neutropenia, and nausea were 29.4%, 47%, 41.2%, 55.8%, and 32.4% compared with 45.8%, 11%, 21.3%, 6.1%, and 16.5%, respectively, reported in patients receiving mutant EGFR-TK inhibitors for their advanced NSCLC.¹²

Another study was conducted in 2019 by Noronha and colleagues to determine the impact of platinum-based chemotherapy combined with gefitinib on patients with advanced NSCLC.¹³ They concluded that 70% of the patients receiving combination treatment developed rash, which was significantly higher compared with 45.8% patients receiving the mutant EGFR-TK inhibitors alone in our study. Also, 56% of patients receiving combination therapy developed diarrhea vs 33.6% of patients receiving mutant EGFR-TK inhibitors only. Similarly, 96% of patients in the combination therapy group developed some degree of anemia compared with only 8.7% patients in the mutant EGFR-TK inhibitors group included in our study. In the same way, neutropenia was observed in 55% of patients receiving combination therapy vs 6.1% in patients receiving mutant EGFR-TK inhibitors solely. They concluded that mutant EGFR-TK inhibitors when combined with platinum-based chemotherapy increase the incidence of AEs of chemotherapy by many folds.^13,14

Kato and colleagues conducted a study to determine the impact on AEs when erlotinib was combined with anti–vascular endothelial growth factor (VEGF) inhibitors like bevacizumab, they stated that 98.7% of patient in combination therapy developed rash, the incidence of which was only 45.8% in patients receiving mutant EGFR-TK inhibitors as was observed in our study. Similar trends were noticed with other AEs, including diarrhea, fatigue, nausea, and elevated liver enzymes.¹⁵

Conclusions

Our study focused on the safety profile of mutant EGFR-TK inhibitors vs platinum-based chemotherapy in the treatment of advanced NSCLC. Mutant EGFR-TK inhibitors are safer than platinum-based chemotherapy when compared for nausea, leucopenia, fatigue, neutropenia, anorexia, anemia, cough, vomiting, and fever. On the other end, mutant EGFR-TK inhibitors cause slightly higher AEs, including rash, diarrhea, elevated AST and ALT levels, and stomatitis. However, considering that the development of mutant EGFR-TK inhibitors laid a foundation of targeted therapy, we recommend continuing using mutant EGFR-TK inhibitors in patients with advanced NSCLC especially in patients having mutant EGFR receptors. AEs caused by mutant EGFR-TK inhibitors are significant but are usually tolerable and can be avoided by reducing the dosage of it with each cycle or by skipping or delaying the dose until the patient is symptomatic.