Armed with pediatric data from the COVID-19 pandemic, a team of researchers is suggesting that most cases of Guillain-Barré syndrome may not be connected to infectious disease, as is sometimes assumed.

While pediatric cases of various types of infections fell by 45%-95% during the early months of the pandemic, cases of acute inflammatory demyelinating polyneuropathy (AIDP), an inflammatory neuropathy belonging to the clinical spectrum of Guillain-Barré syndrome, only fell by about 32%-37%, a rate that’s similar to the 35.1% decline in overall hospital admissions over that time period, researchers found. There was also no apparent link between the appearance of COVID-19 and the number of reported AIDP cases.

“There was no clear association between respiratory or gastrointestinal infections and rates of AIDP. Further, we found that AIDP did not have the expected dramatic reduction when community-acquired infections decreased during the pandemic,” Children’s Hospital of Philadelphia neurologist Craig A. Press, MD, PhD, said in an interview.

Dr. Press and colleagues presented their findings in a poster at the 50th annual meeting of the Child Neurology Society.

According to Dr. Press, the cause of AIDP in most patients is unclear, although infections and vaccinations are often linked to cases. “However, the data supporting this link is often weak. Infections with Campylobacter jejuni [bacteria that causes food poisoning] are known to be associated with AIDP, while rates of AIDP in the general population and in those with influenza are similar.”

For the new multicenter, cross-sectional study, researchers tracked AIDP data from the 47 pediatric hospitals that provide statistics to the Pediatric Health Information System. They focused on the period from January 2017 to September 2020, which included the first months of the COVID-19 pandemic in the United States.

“Social distancing, masks, and increased hand hygiene decrease community-acquired infectious rates in a dramatic way,” Dr. Press said. “If these infections were causing AIDP, we hypothesized that the cases of AIDP would drop substantially as a result.”

But this didn’t appear to happen. Researchers found that the numbers of various types of infections declined from April to September 2020: Respiratory infections dipped by 73%-78%, gastrointestinal infections fell by 45%-61%, and influenza infections dipped by 88%-95%. But AIDP cases didn’t fall as precipitously. In fact, their levels were about the same as they were in April 2017, a month when rates of gastrointestinal, respiratory disease and influenza infections were at seasonally low – but not abnormal – ebbs.

“While we must be cautious interpreting the results,” Dr. Press said, “this makes the link between infections as the main driver of pediatric AIDP less likely.”

However, he said, “this study does not exclude the possibility that rare infections cause AIDP – the data supporting that some more rare infections like campylobacter have a connection to AIDP are more robust – or that common infections very rarely lead to AIDP. While we look for triggers causing inflammatory disorders, AIDP maybe an autoinflammatory disorder without a clear trigger.”

Going forward, Dr. Press said, “we hope to look at infectious data in a more granular way to identify if specific viral or bacterial infectious may be associated with this or other inflammatory disorders. We believe that the use of data like this and the natural experiment that COVID-19 provided may help us to explore the impact of infections on disorders thought to be postinfectious.”

No study funding is reported, and the authors report no relevant disclosures.
 

Armed with pediatric data from the COVID-19 pandemic, a team of researchers is suggesting that most cases of Guillain-Barré syndrome may not be connected to infectious disease, as is sometimes assumed.

While pediatric cases of various types of infections fell by 45%-95% during the early months of the pandemic, cases of acute inflammatory demyelinating polyneuropathy (AIDP), an inflammatory neuropathy belonging to the clinical spectrum of Guillain-Barré syndrome, only fell by about 32%-37%, a rate that’s similar to the 35.1% decline in overall hospital admissions over that time period, researchers found. There was also no apparent link between the appearance of COVID-19 and the number of reported AIDP cases.

“There was no clear association between respiratory or gastrointestinal infections and rates of AIDP. Further, we found that AIDP did not have the expected dramatic reduction when community-acquired infections decreased during the pandemic,” Children’s Hospital of Philadelphia neurologist Craig A. Press, MD, PhD, said in an interview.

Dr. Press and colleagues presented their findings in a poster at the 50th annual meeting of the Child Neurology Society.

According to Dr. Press, the cause of AIDP in most patients is unclear, although infections and vaccinations are often linked to cases. “However, the data supporting this link is often weak. Infections with Campylobacter jejuni [bacteria that causes food poisoning] are known to be associated with AIDP, while rates of AIDP in the general population and in those with influenza are similar.”

For the new multicenter, cross-sectional study, researchers tracked AIDP data from the 47 pediatric hospitals that provide statistics to the Pediatric Health Information System. They focused on the period from January 2017 to September 2020, which included the first months of the COVID-19 pandemic in the United States.

“Social distancing, masks, and increased hand hygiene decrease community-acquired infectious rates in a dramatic way,” Dr. Press said. “If these infections were causing AIDP, we hypothesized that the cases of AIDP would drop substantially as a result.”

But this didn’t appear to happen. Researchers found that the numbers of various types of infections declined from April to September 2020: Respiratory infections dipped by 73%-78%, gastrointestinal infections fell by 45%-61%, and influenza infections dipped by 88%-95%. But AIDP cases didn’t fall as precipitously. In fact, their levels were about the same as they were in April 2017, a month when rates of gastrointestinal, respiratory disease and influenza infections were at seasonally low – but not abnormal – ebbs.

“While we must be cautious interpreting the results,” Dr. Press said, “this makes the link between infections as the main driver of pediatric AIDP less likely.”

However, he said, “this study does not exclude the possibility that rare infections cause AIDP – the data supporting that some more rare infections like campylobacter have a connection to AIDP are more robust – or that common infections very rarely lead to AIDP. While we look for triggers causing inflammatory disorders, AIDP maybe an autoinflammatory disorder without a clear trigger.”

Going forward, Dr. Press said, “we hope to look at infectious data in a more granular way to identify if specific viral or bacterial infectious may be associated with this or other inflammatory disorders. We believe that the use of data like this and the natural experiment that COVID-19 provided may help us to explore the impact of infections on disorders thought to be postinfectious.”

No study funding is reported, and the authors report no relevant disclosures.
 

Armed with pediatric data from the COVID-19 pandemic, a team of researchers is suggesting that most cases of Guillain-Barré syndrome may not be connected to infectious disease, as is sometimes assumed.

While pediatric cases of various types of infections fell by 45%-95% during the early months of the pandemic, cases of acute inflammatory demyelinating polyneuropathy (AIDP), an inflammatory neuropathy belonging to the clinical spectrum of Guillain-Barré syndrome, only fell by about 32%-37%, a rate that’s similar to the 35.1% decline in overall hospital admissions over that time period, researchers found. There was also no apparent link between the appearance of COVID-19 and the number of reported AIDP cases.

“There was no clear association between respiratory or gastrointestinal infections and rates of AIDP. Further, we found that AIDP did not have the expected dramatic reduction when community-acquired infections decreased during the pandemic,” Children’s Hospital of Philadelphia neurologist Craig A. Press, MD, PhD, said in an interview.

Dr. Press and colleagues presented their findings in a poster at the 50th annual meeting of the Child Neurology Society.

According to Dr. Press, the cause of AIDP in most patients is unclear, although infections and vaccinations are often linked to cases. “However, the data supporting this link is often weak. Infections with Campylobacter jejuni [bacteria that causes food poisoning] are known to be associated with AIDP, while rates of AIDP in the general population and in those with influenza are similar.”

For the new multicenter, cross-sectional study, researchers tracked AIDP data from the 47 pediatric hospitals that provide statistics to the Pediatric Health Information System. They focused on the period from January 2017 to September 2020, which included the first months of the COVID-19 pandemic in the United States.

“Social distancing, masks, and increased hand hygiene decrease community-acquired infectious rates in a dramatic way,” Dr. Press said. “If these infections were causing AIDP, we hypothesized that the cases of AIDP would drop substantially as a result.”

But this didn’t appear to happen. Researchers found that the numbers of various types of infections declined from April to September 2020: Respiratory infections dipped by 73%-78%, gastrointestinal infections fell by 45%-61%, and influenza infections dipped by 88%-95%. But AIDP cases didn’t fall as precipitously. In fact, their levels were about the same as they were in April 2017, a month when rates of gastrointestinal, respiratory disease and influenza infections were at seasonally low – but not abnormal – ebbs.

“While we must be cautious interpreting the results,” Dr. Press said, “this makes the link between infections as the main driver of pediatric AIDP less likely.”

However, he said, “this study does not exclude the possibility that rare infections cause AIDP – the data supporting that some more rare infections like campylobacter have a connection to AIDP are more robust – or that common infections very rarely lead to AIDP. While we look for triggers causing inflammatory disorders, AIDP maybe an autoinflammatory disorder without a clear trigger.”

Going forward, Dr. Press said, “we hope to look at infectious data in a more granular way to identify if specific viral or bacterial infectious may be associated with this or other inflammatory disorders. We believe that the use of data like this and the natural experiment that COVID-19 provided may help us to explore the impact of infections on disorders thought to be postinfectious.”

No study funding is reported, and the authors report no relevant disclosures.
 

Children and young adults with epilepsy had fewer seizures after combination treatment with the drug Epidiolex, which contains the cannabidiol (CBD), and various doses of tetrahydrocannabinol (THC), the component of cannabis that makes people high in larger quantities, researchers reported.

“THC can contribute to seizure control and mitigation some of the side effects of CBD,” said study coauthor and Austin, Tex., child neurologist Karen Keough, MD, in an interview. Dr. Keough and colleagues presented their findings at the 50th annual meeting of the Child Neurology Society.

In a landmark move, the Food and Drug Administration approved Epidiolex in 2018 for the treatment of seizures in two rare forms of epilepsy, Lennox-Gastaut syndrome and Dravet syndrome. The agency had never before approved a drug with a purified ingredient derived from marijuana.

CBD, the active ingredient in Epidiolex, is nonpsychoactive. The use in medicine of THC, the main driver of marijuana’s ability to make people stoned, is much more controversial.

Dr. Keough said she had treated 60-70 children with CBD, at the same strength as in Epidiolex (100 mg), and 5 mg of THC before the drug was approved. “I was seeing some very impressive results, and some became seizure free who’d always been refractory,” she said.

When the Epidiolex became available, she said, some patients transitioned to it and stopped taking THC. According to her, some patients fared well. But others immediately experienced worse seizures, she said, and some developed side effects to Epidiolex in the absence of THC, such as agitation and appetite suppression.
 

Combination therapy

For the new study, a retrospective, unblinded cohort analysis, Dr. Keough and colleagues tracked patients who received various doses of CBD, in some cases as Epidiolex, and various doses of THC prescribed by the Texas Original Compassionate Cultivation dispensary, where she serves as chief medical officer.

The initial number of patients was 212; 135 consented to review and 10 were excluded for various reasons leaving a total of 74 subjects in the study. The subjects, whose median age at the start of the study was 12 years (range, 2-25 years), were tracked from 2018 to2021. Just over half (55%) were male, and they remained on the regimen for a median of 805 days (range, 400-1,141).

Of the 74 subjects, 45.9% had a reduction of seizures of more than 75%, and 20.3% had a reduction of 50%-75%. Only 4.1% saw their seizures worsen.

The THC doses varied from none to more than 12 mg/day; CBD doses varied from none to more than 26 mg/kg per day. O the 74 patients, 18 saw their greatest seizure reduction from baseline when they received no THC; 12 saw their greatest seizure reduction from baseline when they received 0-2 mg/kg per day of CBD.
 

Still controversial

Did the patients get high? In some cases they did, Dr. Keough said. However, “a lot of these patients are either too young or too cognitively limited to describe whether they’re feeling intoxicated. That’s one of the many reasons why this is so controversial. You have to go into this with eyes wide open. We’re working in an environment with limited information as to what an intoxicating dose is for a small kid.”

However, she said, it seems clear that “THC can enhance the effect of CBD in children with epilepsy” and reduce CBD side effects. It’s not surprising that the substances work differently since they interact with brain cells in different ways, she said.

For neurologists, she said, “the challenge is to find a reliable source of THC that you can count on and verify so you aren’t overdosing the patients.”

University of Saskatchewan, Saskatoon, child neurologist and cannabinoid researcher Richard Huntsman, MD, who’s familiar with the study findings, said in an interview that they “provide another strong signal that the addition of THC provides benefit, at least in some patients.”

But it’s still unclear “why some children respond best in regards to seizure reduction and side effect profile with combination CBD:THC therapy, and others seemed to do better with CBD alone,” he said. Also unknown: “the ideal THC:CBD ratio that allows optimal seizure control while preventing the potential harmful effects of THC.”

As for the future, he said, “as we are just scratching the surface of our knowledge about the use of cannabis-based therapies in children with neurological disorders, I suspect that the use of these therapies will expand over time.”

No study funding is reported. Dr. Keough disclosed serving as chief medical officer of Texas Original Compassionate Cultivation. Dr. Huntsman disclosed serving as lead investigator of the Cannabidiol in Children with Refractory Epileptic Encephalopathy study and serving on the boards of the Cannabinoid Research Initiative of Saskatchewan (University of Saskatchewan) and Canadian Childhood Cannabinoid Clinical Trials Consortium. He is also cochair of Health Canada’s Scientific Advisory Committee on Cannabinoids for Health Purposes.
 

Children and young adults with epilepsy had fewer seizures after combination treatment with the drug Epidiolex, which contains the cannabidiol (CBD), and various doses of tetrahydrocannabinol (THC), the component of cannabis that makes people high in larger quantities, researchers reported.

“THC can contribute to seizure control and mitigation some of the side effects of CBD,” said study coauthor and Austin, Tex., child neurologist Karen Keough, MD, in an interview. Dr. Keough and colleagues presented their findings at the 50th annual meeting of the Child Neurology Society.

In a landmark move, the Food and Drug Administration approved Epidiolex in 2018 for the treatment of seizures in two rare forms of epilepsy, Lennox-Gastaut syndrome and Dravet syndrome. The agency had never before approved a drug with a purified ingredient derived from marijuana.

CBD, the active ingredient in Epidiolex, is nonpsychoactive. The use in medicine of THC, the main driver of marijuana’s ability to make people stoned, is much more controversial.

Dr. Keough said she had treated 60-70 children with CBD, at the same strength as in Epidiolex (100 mg), and 5 mg of THC before the drug was approved. “I was seeing some very impressive results, and some became seizure free who’d always been refractory,” she said.

When the Epidiolex became available, she said, some patients transitioned to it and stopped taking THC. According to her, some patients fared well. But others immediately experienced worse seizures, she said, and some developed side effects to Epidiolex in the absence of THC, such as agitation and appetite suppression.
 

Combination therapy

For the new study, a retrospective, unblinded cohort analysis, Dr. Keough and colleagues tracked patients who received various doses of CBD, in some cases as Epidiolex, and various doses of THC prescribed by the Texas Original Compassionate Cultivation dispensary, where she serves as chief medical officer.

The initial number of patients was 212; 135 consented to review and 10 were excluded for various reasons leaving a total of 74 subjects in the study. The subjects, whose median age at the start of the study was 12 years (range, 2-25 years), were tracked from 2018 to2021. Just over half (55%) were male, and they remained on the regimen for a median of 805 days (range, 400-1,141).

Of the 74 subjects, 45.9% had a reduction of seizures of more than 75%, and 20.3% had a reduction of 50%-75%. Only 4.1% saw their seizures worsen.

The THC doses varied from none to more than 12 mg/day; CBD doses varied from none to more than 26 mg/kg per day. O the 74 patients, 18 saw their greatest seizure reduction from baseline when they received no THC; 12 saw their greatest seizure reduction from baseline when they received 0-2 mg/kg per day of CBD.
 

Still controversial

Did the patients get high? In some cases they did, Dr. Keough said. However, “a lot of these patients are either too young or too cognitively limited to describe whether they’re feeling intoxicated. That’s one of the many reasons why this is so controversial. You have to go into this with eyes wide open. We’re working in an environment with limited information as to what an intoxicating dose is for a small kid.”

However, she said, it seems clear that “THC can enhance the effect of CBD in children with epilepsy” and reduce CBD side effects. It’s not surprising that the substances work differently since they interact with brain cells in different ways, she said.

For neurologists, she said, “the challenge is to find a reliable source of THC that you can count on and verify so you aren’t overdosing the patients.”

University of Saskatchewan, Saskatoon, child neurologist and cannabinoid researcher Richard Huntsman, MD, who’s familiar with the study findings, said in an interview that they “provide another strong signal that the addition of THC provides benefit, at least in some patients.”

But it’s still unclear “why some children respond best in regards to seizure reduction and side effect profile with combination CBD:THC therapy, and others seemed to do better with CBD alone,” he said. Also unknown: “the ideal THC:CBD ratio that allows optimal seizure control while preventing the potential harmful effects of THC.”

As for the future, he said, “as we are just scratching the surface of our knowledge about the use of cannabis-based therapies in children with neurological disorders, I suspect that the use of these therapies will expand over time.”

No study funding is reported. Dr. Keough disclosed serving as chief medical officer of Texas Original Compassionate Cultivation. Dr. Huntsman disclosed serving as lead investigator of the Cannabidiol in Children with Refractory Epileptic Encephalopathy study and serving on the boards of the Cannabinoid Research Initiative of Saskatchewan (University of Saskatchewan) and Canadian Childhood Cannabinoid Clinical Trials Consortium. He is also cochair of Health Canada’s Scientific Advisory Committee on Cannabinoids for Health Purposes.
 

Children and young adults with epilepsy had fewer seizures after combination treatment with the drug Epidiolex, which contains the cannabidiol (CBD), and various doses of tetrahydrocannabinol (THC), the component of cannabis that makes people high in larger quantities, researchers reported.

“THC can contribute to seizure control and mitigation some of the side effects of CBD,” said study coauthor and Austin, Tex., child neurologist Karen Keough, MD, in an interview. Dr. Keough and colleagues presented their findings at the 50th annual meeting of the Child Neurology Society.

In a landmark move, the Food and Drug Administration approved Epidiolex in 2018 for the treatment of seizures in two rare forms of epilepsy, Lennox-Gastaut syndrome and Dravet syndrome. The agency had never before approved a drug with a purified ingredient derived from marijuana.

CBD, the active ingredient in Epidiolex, is nonpsychoactive. The use in medicine of THC, the main driver of marijuana’s ability to make people stoned, is much more controversial.

Dr. Keough said she had treated 60-70 children with CBD, at the same strength as in Epidiolex (100 mg), and 5 mg of THC before the drug was approved. “I was seeing some very impressive results, and some became seizure free who’d always been refractory,” she said.

When the Epidiolex became available, she said, some patients transitioned to it and stopped taking THC. According to her, some patients fared well. But others immediately experienced worse seizures, she said, and some developed side effects to Epidiolex in the absence of THC, such as agitation and appetite suppression.
 

Combination therapy

For the new study, a retrospective, unblinded cohort analysis, Dr. Keough and colleagues tracked patients who received various doses of CBD, in some cases as Epidiolex, and various doses of THC prescribed by the Texas Original Compassionate Cultivation dispensary, where she serves as chief medical officer.

The initial number of patients was 212; 135 consented to review and 10 were excluded for various reasons leaving a total of 74 subjects in the study. The subjects, whose median age at the start of the study was 12 years (range, 2-25 years), were tracked from 2018 to2021. Just over half (55%) were male, and they remained on the regimen for a median of 805 days (range, 400-1,141).

Of the 74 subjects, 45.9% had a reduction of seizures of more than 75%, and 20.3% had a reduction of 50%-75%. Only 4.1% saw their seizures worsen.

The THC doses varied from none to more than 12 mg/day; CBD doses varied from none to more than 26 mg/kg per day. O the 74 patients, 18 saw their greatest seizure reduction from baseline when they received no THC; 12 saw their greatest seizure reduction from baseline when they received 0-2 mg/kg per day of CBD.
 

Still controversial

Did the patients get high? In some cases they did, Dr. Keough said. However, “a lot of these patients are either too young or too cognitively limited to describe whether they’re feeling intoxicated. That’s one of the many reasons why this is so controversial. You have to go into this with eyes wide open. We’re working in an environment with limited information as to what an intoxicating dose is for a small kid.”

However, she said, it seems clear that “THC can enhance the effect of CBD in children with epilepsy” and reduce CBD side effects. It’s not surprising that the substances work differently since they interact with brain cells in different ways, she said.

For neurologists, she said, “the challenge is to find a reliable source of THC that you can count on and verify so you aren’t overdosing the patients.”

University of Saskatchewan, Saskatoon, child neurologist and cannabinoid researcher Richard Huntsman, MD, who’s familiar with the study findings, said in an interview that they “provide another strong signal that the addition of THC provides benefit, at least in some patients.”

But it’s still unclear “why some children respond best in regards to seizure reduction and side effect profile with combination CBD:THC therapy, and others seemed to do better with CBD alone,” he said. Also unknown: “the ideal THC:CBD ratio that allows optimal seizure control while preventing the potential harmful effects of THC.”

As for the future, he said, “as we are just scratching the surface of our knowledge about the use of cannabis-based therapies in children with neurological disorders, I suspect that the use of these therapies will expand over time.”

No study funding is reported. Dr. Keough disclosed serving as chief medical officer of Texas Original Compassionate Cultivation. Dr. Huntsman disclosed serving as lead investigator of the Cannabidiol in Children with Refractory Epileptic Encephalopathy study and serving on the boards of the Cannabinoid Research Initiative of Saskatchewan (University of Saskatchewan) and Canadian Childhood Cannabinoid Clinical Trials Consortium. He is also cochair of Health Canada’s Scientific Advisory Committee on Cannabinoids for Health Purposes.
 

Which of the following statements about breast density is TRUE?

_{Text copyright DenseBreast-info.org.}

Answer

D. The risks associated with dense breast tissue are 2-fold: Dense tissue can mask cancer on a mammogram, and having dense breasts also increases the risk of developing breast cancer. As breast density increases, the sensitivity of mammography decreases, and the risk of developing breast cancer increases.

A woman’s breast density is usually determined by a radiologist’s visual evaluation of the mammogram. Breast density also can be measured quantitatively by computer software or estimated on computed tomography scan or magnetic resonance imaging. Breast density cannot be determined by the way a breast looks or feels.

Breast density and mammographic sensitivity

Cancers can be hidden or “masked” by dense tissue. On a mammogram, cancer is white. Normal dense tissue also appears white. If a cancer develops in an area of normal dense tissue, it can be harder or sometimes impossible to see it on the mammogram, like trying to see a snowman in a blizzard. As breast density increases, the ability to see cancer on mammography decreases (FIGURE 1).

Standard 2D mammography has been shown to miss about 40% of cancers present in women with extremely dense breasts and 25% of cancers present in women with heterogeneously dense breasts.^1-6 A cancer still can be masked on tomosynthesis (3D mammography) if it occurs in an area of dense tissue (where breast cancers more commonly occur), and tomosynthesis does not improve cancer detection appreciably in women with extremely dense breasts. To find cancer in a woman with dense breasts, additional screening beyond mammography should be considered.

Breast density and breast cancer risk

Dense breast tissue not only reduces mammography effectiveness, it also is a risk factor for the development of breast cancer: the denser the breast, the higher the risk.⁷ A meta-analysis across many studies concluded that magnitude of risk increases with each increase in density category, and women with extremely dense breasts (category D) have a 4-fold greater risk of developing breast cancer than do women with fatty breasts (category A), with upper limit of nearly 6-fold greater risk (FIGURE 2).⁸

Most women do not have fatty breasts, however. More women have breasts with scattered fibroglandular density.⁹ Women with heterogeneously dense breasts (category C) have about a 1.5-fold greater risk of developing breast cancer than those with scattered fibroglandular density (category B), while women with extremely dense breasts (category D) have about a 2-fold greater risk.

There are probably several reasons that dense tissue increases breast cancer risk. One is that cancers arise microscopically in the glandular tissue. The more glandular tissue, the more susceptible tissue where cancer can develop. Glandular cells divide with hormonal stimulation throughout a woman’s lifetime, and each time a cell divides, “mistakes” can be made. An accumulation of mistakes can result in cancer. The more glandular the tissue, the greater the breast cancer risk. Women who have had breast reduction experience a reduced risk for breast cancer: thus, even a reduced absolute amount of glandular tissue reduces the risk for breast cancer. The second is that the local environment around the glands may produce certain growth hormones that stimulate cells to divide, and this is observed with fibrous breast tissue more than fatty breast tissue. ●

Which of the following statements about breast density is TRUE?

_{Text copyright DenseBreast-info.org.}

Answer

D. The risks associated with dense breast tissue are 2-fold: Dense tissue can mask cancer on a mammogram, and having dense breasts also increases the risk of developing breast cancer. As breast density increases, the sensitivity of mammography decreases, and the risk of developing breast cancer increases.

A woman’s breast density is usually determined by a radiologist’s visual evaluation of the mammogram. Breast density also can be measured quantitatively by computer software or estimated on computed tomography scan or magnetic resonance imaging. Breast density cannot be determined by the way a breast looks or feels.

Breast density and mammographic sensitivity

Cancers can be hidden or “masked” by dense tissue. On a mammogram, cancer is white. Normal dense tissue also appears white. If a cancer develops in an area of normal dense tissue, it can be harder or sometimes impossible to see it on the mammogram, like trying to see a snowman in a blizzard. As breast density increases, the ability to see cancer on mammography decreases (FIGURE 1).

Standard 2D mammography has been shown to miss about 40% of cancers present in women with extremely dense breasts and 25% of cancers present in women with heterogeneously dense breasts.^1-6 A cancer still can be masked on tomosynthesis (3D mammography) if it occurs in an area of dense tissue (where breast cancers more commonly occur), and tomosynthesis does not improve cancer detection appreciably in women with extremely dense breasts. To find cancer in a woman with dense breasts, additional screening beyond mammography should be considered.

Breast density and breast cancer risk

Dense breast tissue not only reduces mammography effectiveness, it also is a risk factor for the development of breast cancer: the denser the breast, the higher the risk.⁷ A meta-analysis across many studies concluded that magnitude of risk increases with each increase in density category, and women with extremely dense breasts (category D) have a 4-fold greater risk of developing breast cancer than do women with fatty breasts (category A), with upper limit of nearly 6-fold greater risk (FIGURE 2).⁸

Most women do not have fatty breasts, however. More women have breasts with scattered fibroglandular density.⁹ Women with heterogeneously dense breasts (category C) have about a 1.5-fold greater risk of developing breast cancer than those with scattered fibroglandular density (category B), while women with extremely dense breasts (category D) have about a 2-fold greater risk.

There are probably several reasons that dense tissue increases breast cancer risk. One is that cancers arise microscopically in the glandular tissue. The more glandular tissue, the more susceptible tissue where cancer can develop. Glandular cells divide with hormonal stimulation throughout a woman’s lifetime, and each time a cell divides, “mistakes” can be made. An accumulation of mistakes can result in cancer. The more glandular the tissue, the greater the breast cancer risk. Women who have had breast reduction experience a reduced risk for breast cancer: thus, even a reduced absolute amount of glandular tissue reduces the risk for breast cancer. The second is that the local environment around the glands may produce certain growth hormones that stimulate cells to divide, and this is observed with fibrous breast tissue more than fatty breast tissue. ●

Which of the following statements about breast density is TRUE?

_{Text copyright DenseBreast-info.org.}

Answer

D. The risks associated with dense breast tissue are 2-fold: Dense tissue can mask cancer on a mammogram, and having dense breasts also increases the risk of developing breast cancer. As breast density increases, the sensitivity of mammography decreases, and the risk of developing breast cancer increases.

A woman’s breast density is usually determined by a radiologist’s visual evaluation of the mammogram. Breast density also can be measured quantitatively by computer software or estimated on computed tomography scan or magnetic resonance imaging. Breast density cannot be determined by the way a breast looks or feels.

Breast density and mammographic sensitivity

Cancers can be hidden or “masked” by dense tissue. On a mammogram, cancer is white. Normal dense tissue also appears white. If a cancer develops in an area of normal dense tissue, it can be harder or sometimes impossible to see it on the mammogram, like trying to see a snowman in a blizzard. As breast density increases, the ability to see cancer on mammography decreases (FIGURE 1).

Standard 2D mammography has been shown to miss about 40% of cancers present in women with extremely dense breasts and 25% of cancers present in women with heterogeneously dense breasts.^1-6 A cancer still can be masked on tomosynthesis (3D mammography) if it occurs in an area of dense tissue (where breast cancers more commonly occur), and tomosynthesis does not improve cancer detection appreciably in women with extremely dense breasts. To find cancer in a woman with dense breasts, additional screening beyond mammography should be considered.

Breast density and breast cancer risk

Dense breast tissue not only reduces mammography effectiveness, it also is a risk factor for the development of breast cancer: the denser the breast, the higher the risk.⁷ A meta-analysis across many studies concluded that magnitude of risk increases with each increase in density category, and women with extremely dense breasts (category D) have a 4-fold greater risk of developing breast cancer than do women with fatty breasts (category A), with upper limit of nearly 6-fold greater risk (FIGURE 2).⁸

Most women do not have fatty breasts, however. More women have breasts with scattered fibroglandular density.⁹ Women with heterogeneously dense breasts (category C) have about a 1.5-fold greater risk of developing breast cancer than those with scattered fibroglandular density (category B), while women with extremely dense breasts (category D) have about a 2-fold greater risk.

There are probably several reasons that dense tissue increases breast cancer risk. One is that cancers arise microscopically in the glandular tissue. The more glandular tissue, the more susceptible tissue where cancer can develop. Glandular cells divide with hormonal stimulation throughout a woman’s lifetime, and each time a cell divides, “mistakes” can be made. An accumulation of mistakes can result in cancer. The more glandular the tissue, the greater the breast cancer risk. Women who have had breast reduction experience a reduced risk for breast cancer: thus, even a reduced absolute amount of glandular tissue reduces the risk for breast cancer. The second is that the local environment around the glands may produce certain growth hormones that stimulate cells to divide, and this is observed with fibrous breast tissue more than fatty breast tissue. ●

There is a significantly increased risk for acute respiratory distress syndrome (ARDS)–related death from COVID-19 among people with systemic lupus erythematous (SLE), compared with the general population, according to data collected in Brazil in 2020.

“Special care is therefore necessary for these patients, as well as reinforcement of the importance of preventive measures during a pandemic for this population,” said Eloisa Bonfá, MD, PhD, at the 14th International Congress on Systemic Lupus Erythematosus, which was held together with the 6th International Congress on Controversies in Rheumatology and Autoimmunity.

“We know that lupus patients have an increased susceptibility to infections due to autoimmune dysregulation and use of immunosuppressive therapy,” explained Dr. Bonfá, who is clinical director of the largest tertiary referral center for autoimmune rheumatic diseases in Latin America, the University of São Paulo Faculty of Medicine Hospital Clinics.

“Our study demonstrates for the first time that lupus patients have an increased ARDS severity,” she added.

Prior to the meeting, the study was published in ACR Open Rheumatology.
 

Collating the evidence

Since the COVID-19 pandemic began, there have been more than 20 million confirmed cases of SARS-CoV-2 infection in Brazil and more than half a million deaths.

Dr. Bonfá presented the results of a cross-sectional study that was part of the country’s national Influenza Epidemiological Reporting Surveillance System. Data from 2020 were used, which included just over 252,000 individuals who had polymerase chain reaction–confirmed SARS-CoV-2 infection. Of these individuals, there were 319 consecutively recruited patients with SLE.

The aim was to look at the effect of being hospitalized for COVID-19–related ARDS on outcomes in people with SLE versus the general population.

ARDS was defined as a positive polymerase chain reaction test and accompanying flu-like symptoms with dyspnea, respiratory discomfort, persistent pressure in the chest, or desaturation less than 95% in room air or having a bluish tinge to the lips or face.

Other telling signs of a serious respiratory infection that were evaluated, but not mandatory for study eligibility, were loss of smell, impaired taste, typical CT findings, or having had contact with a confirmed COVID-19 case in the preceding 2 weeks.
 

Key findings

The risk for death from COVID-19–related ARDS was “more than double” in patients with SLE, compared with the general population, Dr. Bonfá reported. The relative risk in the fully adjusted, propensity-scored analysis was approximately 2.25.

That analysis did not account for other comorbidities but was fully adjusted for individuals’ age, sex, and region of Brazil where they lived. The latter was important, Dr. Bonfá said, because “we have a high disparity regarding health access and treatment among regions.”

Comorbidities considered as part of the analyses included arterial hypertension, diabetes, malignancies, neurologic disease, and diseases affecting the heart, lung, liver, and kidneys. Researchers also adjusted for smoking, alcohol intake, body weight, pregnancy, and transplantation.

SLE had a greater impact on individuals’ outcomes than all other comorbidities considered.

“We evaluated lupus as one comorbidity compared to all other comorbidities,” Dr. Bonfá explained.

SLE “more than doubled the chances” of dying from ARDS, she said. “This is [a] very impressive finding.”

They found that SLE was associated with an RR for death of 1.73, compared with non-SLE patients, when propensity-score matching without adjustment for comorbidities was used. The RR for death dropped to 1.40 but was still significant when researchers included comorbidities.

Dr. Bonfá and her team also looked at a combined endpoint of death, ICU admission, and need for mechanical ventilation. They found an increased risk in patients with SLE versus the general population in all their analyses, ranging from 1.70 if comorbidities were included in the model to 1.27 if they weren’t to 1.39 if propensity-score matching alone was used.  
 

Got lupus? ‘Get vaccinated’

“The data we have are in nonvaccinated patients,” Dr. Bonfá said. “We didn’t have vaccines in 2020.”

Whether being vaccinated might make a different to the risks found in this study is an “interesting question,” and one that may be examined in the future.

Certainly, other work Dr. Bonfá has been involved in seems to point to a likely benefit of vaccination in patients with autoimmune diseases in terms of reducing mortality from COVID-19, even when rates of infection may be on the rise.  

“There’s considerable vaccine hesitancy in SLE patients,” Chi-Chiu Mok, MD, of Tuen Mun Hospital in Hong Kong, observed in a separate presentation at the congress.

This may be for several reasons, such as worry that their disease may flare or the vaccine might compromise their drug treatment or result in uncommon complications.

However, “we should encourage our SLE patients to receive COVID-19 vaccination at a time of clinical remission or low disease activity state,” Dr. Mok advised.

“Physical distancing, protective masks, and personal hygiene [measures]” should also continue.

The bottom line for those with SLE is to get vaccinated, stressed Sandra Navarra, MD, of the University of Santo Tomas Hospital in Manila, the Philippines, during the discussion.

“There’s still so much out there that we do not know about,” she said. “Just get yourself vaccinated.”

The study had no outside funding. Dr. Bonfá, Dr. Mok, and Dr. Navarra reported no relevant financial relationships.

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

There is a significantly increased risk for acute respiratory distress syndrome (ARDS)–related death from COVID-19 among people with systemic lupus erythematous (SLE), compared with the general population, according to data collected in Brazil in 2020.

“Special care is therefore necessary for these patients, as well as reinforcement of the importance of preventive measures during a pandemic for this population,” said Eloisa Bonfá, MD, PhD, at the 14th International Congress on Systemic Lupus Erythematosus, which was held together with the 6th International Congress on Controversies in Rheumatology and Autoimmunity.

“We know that lupus patients have an increased susceptibility to infections due to autoimmune dysregulation and use of immunosuppressive therapy,” explained Dr. Bonfá, who is clinical director of the largest tertiary referral center for autoimmune rheumatic diseases in Latin America, the University of São Paulo Faculty of Medicine Hospital Clinics.

“Our study demonstrates for the first time that lupus patients have an increased ARDS severity,” she added.

Prior to the meeting, the study was published in ACR Open Rheumatology.
 

Collating the evidence

Since the COVID-19 pandemic began, there have been more than 20 million confirmed cases of SARS-CoV-2 infection in Brazil and more than half a million deaths.

Dr. Bonfá presented the results of a cross-sectional study that was part of the country’s national Influenza Epidemiological Reporting Surveillance System. Data from 2020 were used, which included just over 252,000 individuals who had polymerase chain reaction–confirmed SARS-CoV-2 infection. Of these individuals, there were 319 consecutively recruited patients with SLE.

The aim was to look at the effect of being hospitalized for COVID-19–related ARDS on outcomes in people with SLE versus the general population.

ARDS was defined as a positive polymerase chain reaction test and accompanying flu-like symptoms with dyspnea, respiratory discomfort, persistent pressure in the chest, or desaturation less than 95% in room air or having a bluish tinge to the lips or face.

Other telling signs of a serious respiratory infection that were evaluated, but not mandatory for study eligibility, were loss of smell, impaired taste, typical CT findings, or having had contact with a confirmed COVID-19 case in the preceding 2 weeks.
 

Key findings

The risk for death from COVID-19–related ARDS was “more than double” in patients with SLE, compared with the general population, Dr. Bonfá reported. The relative risk in the fully adjusted, propensity-scored analysis was approximately 2.25.

That analysis did not account for other comorbidities but was fully adjusted for individuals’ age, sex, and region of Brazil where they lived. The latter was important, Dr. Bonfá said, because “we have a high disparity regarding health access and treatment among regions.”

Comorbidities considered as part of the analyses included arterial hypertension, diabetes, malignancies, neurologic disease, and diseases affecting the heart, lung, liver, and kidneys. Researchers also adjusted for smoking, alcohol intake, body weight, pregnancy, and transplantation.

SLE had a greater impact on individuals’ outcomes than all other comorbidities considered.

“We evaluated lupus as one comorbidity compared to all other comorbidities,” Dr. Bonfá explained.

SLE “more than doubled the chances” of dying from ARDS, she said. “This is [a] very impressive finding.”

They found that SLE was associated with an RR for death of 1.73, compared with non-SLE patients, when propensity-score matching without adjustment for comorbidities was used. The RR for death dropped to 1.40 but was still significant when researchers included comorbidities.

Dr. Bonfá and her team also looked at a combined endpoint of death, ICU admission, and need for mechanical ventilation. They found an increased risk in patients with SLE versus the general population in all their analyses, ranging from 1.70 if comorbidities were included in the model to 1.27 if they weren’t to 1.39 if propensity-score matching alone was used.  
 

Got lupus? ‘Get vaccinated’

“The data we have are in nonvaccinated patients,” Dr. Bonfá said. “We didn’t have vaccines in 2020.”

Whether being vaccinated might make a different to the risks found in this study is an “interesting question,” and one that may be examined in the future.

Certainly, other work Dr. Bonfá has been involved in seems to point to a likely benefit of vaccination in patients with autoimmune diseases in terms of reducing mortality from COVID-19, even when rates of infection may be on the rise.  

“There’s considerable vaccine hesitancy in SLE patients,” Chi-Chiu Mok, MD, of Tuen Mun Hospital in Hong Kong, observed in a separate presentation at the congress.

This may be for several reasons, such as worry that their disease may flare or the vaccine might compromise their drug treatment or result in uncommon complications.

However, “we should encourage our SLE patients to receive COVID-19 vaccination at a time of clinical remission or low disease activity state,” Dr. Mok advised.

“Physical distancing, protective masks, and personal hygiene [measures]” should also continue.

The bottom line for those with SLE is to get vaccinated, stressed Sandra Navarra, MD, of the University of Santo Tomas Hospital in Manila, the Philippines, during the discussion.

“There’s still so much out there that we do not know about,” she said. “Just get yourself vaccinated.”

The study had no outside funding. Dr. Bonfá, Dr. Mok, and Dr. Navarra reported no relevant financial relationships.

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

There is a significantly increased risk for acute respiratory distress syndrome (ARDS)–related death from COVID-19 among people with systemic lupus erythematous (SLE), compared with the general population, according to data collected in Brazil in 2020.

“Special care is therefore necessary for these patients, as well as reinforcement of the importance of preventive measures during a pandemic for this population,” said Eloisa Bonfá, MD, PhD, at the 14th International Congress on Systemic Lupus Erythematosus, which was held together with the 6th International Congress on Controversies in Rheumatology and Autoimmunity.

“We know that lupus patients have an increased susceptibility to infections due to autoimmune dysregulation and use of immunosuppressive therapy,” explained Dr. Bonfá, who is clinical director of the largest tertiary referral center for autoimmune rheumatic diseases in Latin America, the University of São Paulo Faculty of Medicine Hospital Clinics.

“Our study demonstrates for the first time that lupus patients have an increased ARDS severity,” she added.

Prior to the meeting, the study was published in ACR Open Rheumatology.
 

Collating the evidence

Since the COVID-19 pandemic began, there have been more than 20 million confirmed cases of SARS-CoV-2 infection in Brazil and more than half a million deaths.

Dr. Bonfá presented the results of a cross-sectional study that was part of the country’s national Influenza Epidemiological Reporting Surveillance System. Data from 2020 were used, which included just over 252,000 individuals who had polymerase chain reaction–confirmed SARS-CoV-2 infection. Of these individuals, there were 319 consecutively recruited patients with SLE.

The aim was to look at the effect of being hospitalized for COVID-19–related ARDS on outcomes in people with SLE versus the general population.

ARDS was defined as a positive polymerase chain reaction test and accompanying flu-like symptoms with dyspnea, respiratory discomfort, persistent pressure in the chest, or desaturation less than 95% in room air or having a bluish tinge to the lips or face.

Other telling signs of a serious respiratory infection that were evaluated, but not mandatory for study eligibility, were loss of smell, impaired taste, typical CT findings, or having had contact with a confirmed COVID-19 case in the preceding 2 weeks.
 

Key findings

The risk for death from COVID-19–related ARDS was “more than double” in patients with SLE, compared with the general population, Dr. Bonfá reported. The relative risk in the fully adjusted, propensity-scored analysis was approximately 2.25.

That analysis did not account for other comorbidities but was fully adjusted for individuals’ age, sex, and region of Brazil where they lived. The latter was important, Dr. Bonfá said, because “we have a high disparity regarding health access and treatment among regions.”

Comorbidities considered as part of the analyses included arterial hypertension, diabetes, malignancies, neurologic disease, and diseases affecting the heart, lung, liver, and kidneys. Researchers also adjusted for smoking, alcohol intake, body weight, pregnancy, and transplantation.

SLE had a greater impact on individuals’ outcomes than all other comorbidities considered.

“We evaluated lupus as one comorbidity compared to all other comorbidities,” Dr. Bonfá explained.

SLE “more than doubled the chances” of dying from ARDS, she said. “This is [a] very impressive finding.”

They found that SLE was associated with an RR for death of 1.73, compared with non-SLE patients, when propensity-score matching without adjustment for comorbidities was used. The RR for death dropped to 1.40 but was still significant when researchers included comorbidities.

Dr. Bonfá and her team also looked at a combined endpoint of death, ICU admission, and need for mechanical ventilation. They found an increased risk in patients with SLE versus the general population in all their analyses, ranging from 1.70 if comorbidities were included in the model to 1.27 if they weren’t to 1.39 if propensity-score matching alone was used.  
 

Got lupus? ‘Get vaccinated’

“The data we have are in nonvaccinated patients,” Dr. Bonfá said. “We didn’t have vaccines in 2020.”

Whether being vaccinated might make a different to the risks found in this study is an “interesting question,” and one that may be examined in the future.

Certainly, other work Dr. Bonfá has been involved in seems to point to a likely benefit of vaccination in patients with autoimmune diseases in terms of reducing mortality from COVID-19, even when rates of infection may be on the rise.  

“There’s considerable vaccine hesitancy in SLE patients,” Chi-Chiu Mok, MD, of Tuen Mun Hospital in Hong Kong, observed in a separate presentation at the congress.

This may be for several reasons, such as worry that their disease may flare or the vaccine might compromise their drug treatment or result in uncommon complications.

However, “we should encourage our SLE patients to receive COVID-19 vaccination at a time of clinical remission or low disease activity state,” Dr. Mok advised.

“Physical distancing, protective masks, and personal hygiene [measures]” should also continue.

The bottom line for those with SLE is to get vaccinated, stressed Sandra Navarra, MD, of the University of Santo Tomas Hospital in Manila, the Philippines, during the discussion.

“There’s still so much out there that we do not know about,” she said. “Just get yourself vaccinated.”

The study had no outside funding. Dr. Bonfá, Dr. Mok, and Dr. Navarra reported no relevant financial relationships.

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

Combinations of abnormal pH-impedance metrics better predicted nonresponse to proton pump inhibitor therapy, as well as benefit of treatment escalation, than individual metrics in patients with gastroesophageal reflux disease (GERD) on twice-daily PPI.

The researchers found a higher proportion of nonresponders to PPI in a group of patients that had combinations of abnormal reflux burden, characterized as acid exposure time greater than 4%, more than 80 reflux episodes, and/or mean nocturnal baseline impedance (MNBI) less than 1,500 ohms, with 85% of these patients improving following initiation of invasive GERD management such as antireflux surgery or magnetic sphincter augmentation.

Not only does the combination of metrics offer more value in identifying responders to PPI than individual metrics, but the combination also offer greater value in “subsequently predicting response to escalation of antireflux management,” study authors C. Prakash Gyawali, MD, of Washington University, St. Louis, and colleagues wrote in Gastroenterology.

Currently in question is the applicability of thresholds for metrics from pH impedance monitoring for studies performed on PPI. According to Dr. Gyawali and colleagues, thresholds from the Lyon Consensus may be too high and likewise lack optimal sensitivity for detecting refractory acid burden in patients on PPI, while thresholds based on pH-metry alone, as reported in other publications, may also lack specificity.

To determine which metrics from “on PPI” pH impedance studies predict escalation therapy needs, the researchers analyzed deidentified pH impedance studies performed in healthy volunteers (n=66; median age, 37.5 years) and patients with GERD (n = 43; median age, 57.0 years); both groups were on twice-daily PPI. The investigators compared median values for pH impedance metrics between healthy volunteers and patients with proven GERD using validated measures.

Data were included from a total of three groups: tracings from European and North American healthy volunteers who received twice-daily PPI for 5-7 days; tracings from European patients with heartburn-predominant proven GERD with prior abnormal reflux monitoring off PPI who subsequently received twice-daily PPI; and tracings from a cohort of patients with regurgitation-predominant, proven GERD and prior abnormal reflux monitoring off PPI who subsequently received twice-daily PPI.

A improvement in heartburn of at least 50%, as recorded on 4-point Likert-type scales, defined PPI responders and improvements following antireflux surgery in the European comparison group. Additionally, an improvement of at least 50% on the GERD Health-Related Quality of Life scale also characterized PPI responders and improvements following magnetic sphincter augmentation in the North American comparison group.

There was no significant difference between PPI responders and nonresponders in terms of individual conventional and novel reflux metrics. The combinations of metrics associated with abnormal reflux burden and abnormal mucosal integrity (acid exposure time >4%, >80 reflux episodes, and MNBI <1,500 ohms) were observed in 32.6% of patients with heartburn and 40.5% of patients with regurgitation-predominant GERD, but no healthy volunteers. The combinations were also observed in 57.1% and 82.4% of nonresponders, respectively.

The authors defined a borderline category (acid exposure time, >0.5% but <4%; >40 but <80 reflux episodes), which accounted for 32.6% of patients with heartburn-predominant GERD and 50% of those regurgitation-predominant GERD. Nonresponse among these borderline cases was identified in 28.6% and 81%, respectively.

“Performance characteristics of the presence of abnormal reflux burden and/or abnormal mucosal integrity in predicting PPI nonresponse consisted of sensitivity, 0.50; specificity, 0.71; and AUC, 0.59 (P = .15),” the authors explained. “Performance characteristics of abnormal and borderline reflux burden categories together in predicting PPI nonresponse consisted of sensitivity, 0.86; specificity, 0.36; and AUC, 0.62 (P = .07).”

Limitations of this study included its retrospective nature, small sample sizes for the healthy volunteer and GERD populations, and the lack of data on relevant clinical information, including body mass index, dietary patterns, and PPI types and doses. Additionally, the findings may lack generalizability because of the inclusion of only patients with GERD who underwent surgical management.

Despite these limitations, the researchers wrote that the findings and identified “thresholds will be useful in planning prospective outcome studies to conclusively determine when to escalate antireflux therapy when GERD symptoms persist despite bid PPI therapy.”

The study researchers reported conflicts of interest with several pharmaceutical companies. No funding was reported for the study.

Combinations of abnormal pH-impedance metrics better predicted nonresponse to proton pump inhibitor therapy, as well as benefit of treatment escalation, than individual metrics in patients with gastroesophageal reflux disease (GERD) on twice-daily PPI.

The researchers found a higher proportion of nonresponders to PPI in a group of patients that had combinations of abnormal reflux burden, characterized as acid exposure time greater than 4%, more than 80 reflux episodes, and/or mean nocturnal baseline impedance (MNBI) less than 1,500 ohms, with 85% of these patients improving following initiation of invasive GERD management such as antireflux surgery or magnetic sphincter augmentation.

Not only does the combination of metrics offer more value in identifying responders to PPI than individual metrics, but the combination also offer greater value in “subsequently predicting response to escalation of antireflux management,” study authors C. Prakash Gyawali, MD, of Washington University, St. Louis, and colleagues wrote in Gastroenterology.

Currently in question is the applicability of thresholds for metrics from pH impedance monitoring for studies performed on PPI. According to Dr. Gyawali and colleagues, thresholds from the Lyon Consensus may be too high and likewise lack optimal sensitivity for detecting refractory acid burden in patients on PPI, while thresholds based on pH-metry alone, as reported in other publications, may also lack specificity.

To determine which metrics from “on PPI” pH impedance studies predict escalation therapy needs, the researchers analyzed deidentified pH impedance studies performed in healthy volunteers (n=66; median age, 37.5 years) and patients with GERD (n = 43; median age, 57.0 years); both groups were on twice-daily PPI. The investigators compared median values for pH impedance metrics between healthy volunteers and patients with proven GERD using validated measures.

Data were included from a total of three groups: tracings from European and North American healthy volunteers who received twice-daily PPI for 5-7 days; tracings from European patients with heartburn-predominant proven GERD with prior abnormal reflux monitoring off PPI who subsequently received twice-daily PPI; and tracings from a cohort of patients with regurgitation-predominant, proven GERD and prior abnormal reflux monitoring off PPI who subsequently received twice-daily PPI.

A improvement in heartburn of at least 50%, as recorded on 4-point Likert-type scales, defined PPI responders and improvements following antireflux surgery in the European comparison group. Additionally, an improvement of at least 50% on the GERD Health-Related Quality of Life scale also characterized PPI responders and improvements following magnetic sphincter augmentation in the North American comparison group.

There was no significant difference between PPI responders and nonresponders in terms of individual conventional and novel reflux metrics. The combinations of metrics associated with abnormal reflux burden and abnormal mucosal integrity (acid exposure time >4%, >80 reflux episodes, and MNBI <1,500 ohms) were observed in 32.6% of patients with heartburn and 40.5% of patients with regurgitation-predominant GERD, but no healthy volunteers. The combinations were also observed in 57.1% and 82.4% of nonresponders, respectively.

The authors defined a borderline category (acid exposure time, >0.5% but <4%; >40 but <80 reflux episodes), which accounted for 32.6% of patients with heartburn-predominant GERD and 50% of those regurgitation-predominant GERD. Nonresponse among these borderline cases was identified in 28.6% and 81%, respectively.

“Performance characteristics of the presence of abnormal reflux burden and/or abnormal mucosal integrity in predicting PPI nonresponse consisted of sensitivity, 0.50; specificity, 0.71; and AUC, 0.59 (P = .15),” the authors explained. “Performance characteristics of abnormal and borderline reflux burden categories together in predicting PPI nonresponse consisted of sensitivity, 0.86; specificity, 0.36; and AUC, 0.62 (P = .07).”

Limitations of this study included its retrospective nature, small sample sizes for the healthy volunteer and GERD populations, and the lack of data on relevant clinical information, including body mass index, dietary patterns, and PPI types and doses. Additionally, the findings may lack generalizability because of the inclusion of only patients with GERD who underwent surgical management.

Despite these limitations, the researchers wrote that the findings and identified “thresholds will be useful in planning prospective outcome studies to conclusively determine when to escalate antireflux therapy when GERD symptoms persist despite bid PPI therapy.”

The study researchers reported conflicts of interest with several pharmaceutical companies. No funding was reported for the study.

Combinations of abnormal pH-impedance metrics better predicted nonresponse to proton pump inhibitor therapy, as well as benefit of treatment escalation, than individual metrics in patients with gastroesophageal reflux disease (GERD) on twice-daily PPI.

The researchers found a higher proportion of nonresponders to PPI in a group of patients that had combinations of abnormal reflux burden, characterized as acid exposure time greater than 4%, more than 80 reflux episodes, and/or mean nocturnal baseline impedance (MNBI) less than 1,500 ohms, with 85% of these patients improving following initiation of invasive GERD management such as antireflux surgery or magnetic sphincter augmentation.

Not only does the combination of metrics offer more value in identifying responders to PPI than individual metrics, but the combination also offer greater value in “subsequently predicting response to escalation of antireflux management,” study authors C. Prakash Gyawali, MD, of Washington University, St. Louis, and colleagues wrote in Gastroenterology.

Currently in question is the applicability of thresholds for metrics from pH impedance monitoring for studies performed on PPI. According to Dr. Gyawali and colleagues, thresholds from the Lyon Consensus may be too high and likewise lack optimal sensitivity for detecting refractory acid burden in patients on PPI, while thresholds based on pH-metry alone, as reported in other publications, may also lack specificity.

To determine which metrics from “on PPI” pH impedance studies predict escalation therapy needs, the researchers analyzed deidentified pH impedance studies performed in healthy volunteers (n=66; median age, 37.5 years) and patients with GERD (n = 43; median age, 57.0 years); both groups were on twice-daily PPI. The investigators compared median values for pH impedance metrics between healthy volunteers and patients with proven GERD using validated measures.

Data were included from a total of three groups: tracings from European and North American healthy volunteers who received twice-daily PPI for 5-7 days; tracings from European patients with heartburn-predominant proven GERD with prior abnormal reflux monitoring off PPI who subsequently received twice-daily PPI; and tracings from a cohort of patients with regurgitation-predominant, proven GERD and prior abnormal reflux monitoring off PPI who subsequently received twice-daily PPI.

A improvement in heartburn of at least 50%, as recorded on 4-point Likert-type scales, defined PPI responders and improvements following antireflux surgery in the European comparison group. Additionally, an improvement of at least 50% on the GERD Health-Related Quality of Life scale also characterized PPI responders and improvements following magnetic sphincter augmentation in the North American comparison group.

There was no significant difference between PPI responders and nonresponders in terms of individual conventional and novel reflux metrics. The combinations of metrics associated with abnormal reflux burden and abnormal mucosal integrity (acid exposure time >4%, >80 reflux episodes, and MNBI <1,500 ohms) were observed in 32.6% of patients with heartburn and 40.5% of patients with regurgitation-predominant GERD, but no healthy volunteers. The combinations were also observed in 57.1% and 82.4% of nonresponders, respectively.

The authors defined a borderline category (acid exposure time, >0.5% but <4%; >40 but <80 reflux episodes), which accounted for 32.6% of patients with heartburn-predominant GERD and 50% of those regurgitation-predominant GERD. Nonresponse among these borderline cases was identified in 28.6% and 81%, respectively.

“Performance characteristics of the presence of abnormal reflux burden and/or abnormal mucosal integrity in predicting PPI nonresponse consisted of sensitivity, 0.50; specificity, 0.71; and AUC, 0.59 (P = .15),” the authors explained. “Performance characteristics of abnormal and borderline reflux burden categories together in predicting PPI nonresponse consisted of sensitivity, 0.86; specificity, 0.36; and AUC, 0.62 (P = .07).”

Limitations of this study included its retrospective nature, small sample sizes for the healthy volunteer and GERD populations, and the lack of data on relevant clinical information, including body mass index, dietary patterns, and PPI types and doses. Additionally, the findings may lack generalizability because of the inclusion of only patients with GERD who underwent surgical management.

Despite these limitations, the researchers wrote that the findings and identified “thresholds will be useful in planning prospective outcome studies to conclusively determine when to escalate antireflux therapy when GERD symptoms persist despite bid PPI therapy.”

The study researchers reported conflicts of interest with several pharmaceutical companies. No funding was reported for the study.

Sustained, intensive therapy with two antiglutamatergic drugs is superior to standard aggressive treatment for postanoxic super-refractory status epilepticus (SRSE), new research suggests.

In a retrospective cohort study of survivors of cardiac arrest with postanoxic sustained SRSE, resolution of the condition was achieved by 81% of those who received intensive treatment of ketamine plus perampanel, versus 41% of those who received standard care.

The novelty of the new treatment approach is the duration of therapy as well as the dual antiglutamate drugs, researchers note.

“So the logic is to continue treatment until resolution of refractory status epilepticus under continuous EEG [electroencephalographic] monitoring,” reported lead investigator Simone Beretta, MD, San Gerardo University Hospital, Monza, Italy.

Therapy was guided by data on brainstem reflexes, N20 cortical responses, neuronal serum enolase levels, and neuroimaging.

If all or most of these indicators are favorable, “we continue to treat without any time limit,” Dr. Beretta said. However, if the indicators become unfavorable, clinicians should consider lowering the intensity of care, he added.

The findings were presented at the 2021 World Congress of Neurology (WCN).
 

SUPER-CAT trial

In SRSE, epileptic seizures occur one after another without patients recovering consciousness in between. Standard aggressive therapy for the condition does not include antiglutamatergic drugs, the researchers noted.

In the Super-Refractory Status Epilepticus After Cardiac Arrest: Aggressive Treatment Guided by Multimodal Prognostic Indicators (SUPER-CAT) study, researchers assessed the combination of two such medications.

The first was the anti-NMDA receptor drug ketamine, which was given by intravenous bolus and then continuous infusion for 3 days guided by continuous EEG to reach a ketamine EEG pattern, as evidenced by alpha and beta waves. It was combined with the anti-AMPA receptor antiepileptic perampanel via nasogastric tube for 5 days, followed by slow tapering.

Dr. Beretta noted that in the ongoing TELSTAR trial, which involved a similar patient population, a different drug combination is being used. A major difference between the two trials is that in the TELSTAR trial, aggressive therapy continues for only 2 days if there is no response.

“In the SUPER-CAT study, we continue far beyond 2 days in the majority of patients,” he said. In addition, ketamine and perampanel were not assessed in TELSTAR.

In SUPER-CAT, 489 survivors of cardiac arrest were recruited over 10 years. Of these, 101 had refractory status epilepticus. After excluding those with more than two indicators of poor prognosis (n = 31) or whose status epilepticus resolved (n = 14), 56 patients were determined to have SRSE. All had experienced relapse after undergoing one cycle of anesthetic.

The 56 participants received one of three treatment regimens: double antiglutamate (DAG) therapy of ketamine and perampanel (n = 26), single antiglutamate therapy with either agent (n = 8), or aggressive nonantiglutamate (NAG) therapy with antiepilepsy drugs and anesthetics other than ketamine or perampanel (n = 22).

The single-antiglutamate group was not included in the analysis of patient outcomes.

The DAG and NAG groups were well balanced at baseline. There were no significant differences in median age (60 years vs. 66 years), gender, low cerebral blood flow, presence of bilateral pupillary or corneal reflexes, neuron-specific enolase levels, cortical N20 somatosenory evoked potentials, moderate to severe postanoxic brain injury, and hypothermia/targeted temperature management.
 

Primary outcome met

More patients in the DAG group (42%) had moderate to severe postanoxic brain injury than in the NAG group (28%). However, the difference was not statistically significant (P = .08), possibly because of the small sample sizes. The number of antiepileptic drugs and the number of cycles of anesthetics did not differ between the groups.

Results showed that efficacy and safety outcomes favored DAG therapy.

The primary efficacy outcome was resolution of status epilepticus within 3 days after initiation of treatments. Status epilepticus resolved for 21 of 26 patients in the DAG group (81%), versus 9 of 22 patients in the NAG group (41%; odds ratio, 6.06; 95% confidence interval, 1.66-22.12; P = .005).

For secondary efficacy outcomes, there was a trend in favor of DAG, but differences from the NAG group were not statistically significant. In the groups, 46% versus 32% awakened and responded to commands before discharge from the intensive care unit, and 32% versus 23% showed good neurologic outcome at 6 months.

The primary safety outcome of all-cause mortality risk in the ICU was 90% lower for patients treated with DAG than for those treated with NAG (15% vs. 64%; OR, 0.1; 95% CI, 0.02-0.41; P < .01). Dr. Beretta explained that the high mortality rate in the NAG group was presumably a result of unresolved status epilepticus.

The secondary safety outcome of a transitory rise of gamma-glutamyl transferase greater than three times the upper limit of normal in the DAG group was expected with high-dose perampanel, the investigators noted. This outcome occurred in 77% of the DAG group versus 27% of the NAG group (OR, 9.88; 95% CI, 2.4-32.9; P < .001).

There was no statistically significant difference in incidence of recurrent cardiac arrest during therapy. This occurred in one member of the DAG group and in none in the NAG group.

Dr. Beretta reported that their investigations are still in a retrospective phase, but the researchers plan to move the work into a prospective phase and possibly a randomized trial soon.
 

Fascinating, promising

Commenting on the findings, Jaysingh Singh, MD, co-director of the Epilepsy Surgery Center at the Ohio State University Wexner Medical Center, Columbus, said the study provides “fascinating, very helpful data” about a condition that has responded well to current treatment options.

He added that his center has used “the innovative treatments” discussed in the study for a few patients.

“More concrete evidence will push us to use it more uniformly across all our patient population [that] has refractory status. So I’m very optimistic, and the data were very promising,” said Dr. Singh, who was not involved with the research.

He cautioned that the study was retrospective, not randomized or controlled, and that it involved a small number of patients but said that the data were “heading in the right direction.”

Although resolution of status epilepticus was better among patients in the DAG group than in the NAG group, the awakenings and neurologic outcomes were “pretty much same as standard medical therapy, which we commonly give to our patients,” said Dr. Singh. “We see this phenomenon all the time in our patients.”

He noted that other factors can determine how patients respond, such as conditions of the heart or kidneys, the presence of sepsis, and multiorgan dysfunction. These factors were not controlled for in the study.

Nonetheless, he said the study achieved its primary endpoint of better resolution of status epilepticus “because that’s the first thing you want to see: whether the treatment is taking care of that.”

The study received no outside funding. Dr. Beretta and Dr. Singh have disclosed no relevant financial relationships.

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

Sustained, intensive therapy with two antiglutamatergic drugs is superior to standard aggressive treatment for postanoxic super-refractory status epilepticus (SRSE), new research suggests.

In a retrospective cohort study of survivors of cardiac arrest with postanoxic sustained SRSE, resolution of the condition was achieved by 81% of those who received intensive treatment of ketamine plus perampanel, versus 41% of those who received standard care.

The novelty of the new treatment approach is the duration of therapy as well as the dual antiglutamate drugs, researchers note.

“So the logic is to continue treatment until resolution of refractory status epilepticus under continuous EEG [electroencephalographic] monitoring,” reported lead investigator Simone Beretta, MD, San Gerardo University Hospital, Monza, Italy.

Therapy was guided by data on brainstem reflexes, N20 cortical responses, neuronal serum enolase levels, and neuroimaging.

If all or most of these indicators are favorable, “we continue to treat without any time limit,” Dr. Beretta said. However, if the indicators become unfavorable, clinicians should consider lowering the intensity of care, he added.

The findings were presented at the 2021 World Congress of Neurology (WCN).
 

SUPER-CAT trial

In SRSE, epileptic seizures occur one after another without patients recovering consciousness in between. Standard aggressive therapy for the condition does not include antiglutamatergic drugs, the researchers noted.

In the Super-Refractory Status Epilepticus After Cardiac Arrest: Aggressive Treatment Guided by Multimodal Prognostic Indicators (SUPER-CAT) study, researchers assessed the combination of two such medications.

The first was the anti-NMDA receptor drug ketamine, which was given by intravenous bolus and then continuous infusion for 3 days guided by continuous EEG to reach a ketamine EEG pattern, as evidenced by alpha and beta waves. It was combined with the anti-AMPA receptor antiepileptic perampanel via nasogastric tube for 5 days, followed by slow tapering.

Dr. Beretta noted that in the ongoing TELSTAR trial, which involved a similar patient population, a different drug combination is being used. A major difference between the two trials is that in the TELSTAR trial, aggressive therapy continues for only 2 days if there is no response.

“In the SUPER-CAT study, we continue far beyond 2 days in the majority of patients,” he said. In addition, ketamine and perampanel were not assessed in TELSTAR.

In SUPER-CAT, 489 survivors of cardiac arrest were recruited over 10 years. Of these, 101 had refractory status epilepticus. After excluding those with more than two indicators of poor prognosis (n = 31) or whose status epilepticus resolved (n = 14), 56 patients were determined to have SRSE. All had experienced relapse after undergoing one cycle of anesthetic.

The 56 participants received one of three treatment regimens: double antiglutamate (DAG) therapy of ketamine and perampanel (n = 26), single antiglutamate therapy with either agent (n = 8), or aggressive nonantiglutamate (NAG) therapy with antiepilepsy drugs and anesthetics other than ketamine or perampanel (n = 22).

The single-antiglutamate group was not included in the analysis of patient outcomes.

The DAG and NAG groups were well balanced at baseline. There were no significant differences in median age (60 years vs. 66 years), gender, low cerebral blood flow, presence of bilateral pupillary or corneal reflexes, neuron-specific enolase levels, cortical N20 somatosenory evoked potentials, moderate to severe postanoxic brain injury, and hypothermia/targeted temperature management.
 

Primary outcome met

More patients in the DAG group (42%) had moderate to severe postanoxic brain injury than in the NAG group (28%). However, the difference was not statistically significant (P = .08), possibly because of the small sample sizes. The number of antiepileptic drugs and the number of cycles of anesthetics did not differ between the groups.

Results showed that efficacy and safety outcomes favored DAG therapy.

The primary efficacy outcome was resolution of status epilepticus within 3 days after initiation of treatments. Status epilepticus resolved for 21 of 26 patients in the DAG group (81%), versus 9 of 22 patients in the NAG group (41%; odds ratio, 6.06; 95% confidence interval, 1.66-22.12; P = .005).

For secondary efficacy outcomes, there was a trend in favor of DAG, but differences from the NAG group were not statistically significant. In the groups, 46% versus 32% awakened and responded to commands before discharge from the intensive care unit, and 32% versus 23% showed good neurologic outcome at 6 months.

The primary safety outcome of all-cause mortality risk in the ICU was 90% lower for patients treated with DAG than for those treated with NAG (15% vs. 64%; OR, 0.1; 95% CI, 0.02-0.41; P < .01). Dr. Beretta explained that the high mortality rate in the NAG group was presumably a result of unresolved status epilepticus.

The secondary safety outcome of a transitory rise of gamma-glutamyl transferase greater than three times the upper limit of normal in the DAG group was expected with high-dose perampanel, the investigators noted. This outcome occurred in 77% of the DAG group versus 27% of the NAG group (OR, 9.88; 95% CI, 2.4-32.9; P < .001).

There was no statistically significant difference in incidence of recurrent cardiac arrest during therapy. This occurred in one member of the DAG group and in none in the NAG group.

Dr. Beretta reported that their investigations are still in a retrospective phase, but the researchers plan to move the work into a prospective phase and possibly a randomized trial soon.
 

Fascinating, promising

Commenting on the findings, Jaysingh Singh, MD, co-director of the Epilepsy Surgery Center at the Ohio State University Wexner Medical Center, Columbus, said the study provides “fascinating, very helpful data” about a condition that has responded well to current treatment options.

He added that his center has used “the innovative treatments” discussed in the study for a few patients.

“More concrete evidence will push us to use it more uniformly across all our patient population [that] has refractory status. So I’m very optimistic, and the data were very promising,” said Dr. Singh, who was not involved with the research.

He cautioned that the study was retrospective, not randomized or controlled, and that it involved a small number of patients but said that the data were “heading in the right direction.”

Although resolution of status epilepticus was better among patients in the DAG group than in the NAG group, the awakenings and neurologic outcomes were “pretty much same as standard medical therapy, which we commonly give to our patients,” said Dr. Singh. “We see this phenomenon all the time in our patients.”

He noted that other factors can determine how patients respond, such as conditions of the heart or kidneys, the presence of sepsis, and multiorgan dysfunction. These factors were not controlled for in the study.

Nonetheless, he said the study achieved its primary endpoint of better resolution of status epilepticus “because that’s the first thing you want to see: whether the treatment is taking care of that.”

The study received no outside funding. Dr. Beretta and Dr. Singh have disclosed no relevant financial relationships.

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

Sustained, intensive therapy with two antiglutamatergic drugs is superior to standard aggressive treatment for postanoxic super-refractory status epilepticus (SRSE), new research suggests.

In a retrospective cohort study of survivors of cardiac arrest with postanoxic sustained SRSE, resolution of the condition was achieved by 81% of those who received intensive treatment of ketamine plus perampanel, versus 41% of those who received standard care.

The novelty of the new treatment approach is the duration of therapy as well as the dual antiglutamate drugs, researchers note.

“So the logic is to continue treatment until resolution of refractory status epilepticus under continuous EEG [electroencephalographic] monitoring,” reported lead investigator Simone Beretta, MD, San Gerardo University Hospital, Monza, Italy.

Therapy was guided by data on brainstem reflexes, N20 cortical responses, neuronal serum enolase levels, and neuroimaging.

If all or most of these indicators are favorable, “we continue to treat without any time limit,” Dr. Beretta said. However, if the indicators become unfavorable, clinicians should consider lowering the intensity of care, he added.

The findings were presented at the 2021 World Congress of Neurology (WCN).
 

SUPER-CAT trial

In SRSE, epileptic seizures occur one after another without patients recovering consciousness in between. Standard aggressive therapy for the condition does not include antiglutamatergic drugs, the researchers noted.

In the Super-Refractory Status Epilepticus After Cardiac Arrest: Aggressive Treatment Guided by Multimodal Prognostic Indicators (SUPER-CAT) study, researchers assessed the combination of two such medications.

The first was the anti-NMDA receptor drug ketamine, which was given by intravenous bolus and then continuous infusion for 3 days guided by continuous EEG to reach a ketamine EEG pattern, as evidenced by alpha and beta waves. It was combined with the anti-AMPA receptor antiepileptic perampanel via nasogastric tube for 5 days, followed by slow tapering.

Dr. Beretta noted that in the ongoing TELSTAR trial, which involved a similar patient population, a different drug combination is being used. A major difference between the two trials is that in the TELSTAR trial, aggressive therapy continues for only 2 days if there is no response.

“In the SUPER-CAT study, we continue far beyond 2 days in the majority of patients,” he said. In addition, ketamine and perampanel were not assessed in TELSTAR.

In SUPER-CAT, 489 survivors of cardiac arrest were recruited over 10 years. Of these, 101 had refractory status epilepticus. After excluding those with more than two indicators of poor prognosis (n = 31) or whose status epilepticus resolved (n = 14), 56 patients were determined to have SRSE. All had experienced relapse after undergoing one cycle of anesthetic.

The 56 participants received one of three treatment regimens: double antiglutamate (DAG) therapy of ketamine and perampanel (n = 26), single antiglutamate therapy with either agent (n = 8), or aggressive nonantiglutamate (NAG) therapy with antiepilepsy drugs and anesthetics other than ketamine or perampanel (n = 22).

The single-antiglutamate group was not included in the analysis of patient outcomes.

The DAG and NAG groups were well balanced at baseline. There were no significant differences in median age (60 years vs. 66 years), gender, low cerebral blood flow, presence of bilateral pupillary or corneal reflexes, neuron-specific enolase levels, cortical N20 somatosenory evoked potentials, moderate to severe postanoxic brain injury, and hypothermia/targeted temperature management.
 

Primary outcome met

More patients in the DAG group (42%) had moderate to severe postanoxic brain injury than in the NAG group (28%). However, the difference was not statistically significant (P = .08), possibly because of the small sample sizes. The number of antiepileptic drugs and the number of cycles of anesthetics did not differ between the groups.

Results showed that efficacy and safety outcomes favored DAG therapy.

The primary efficacy outcome was resolution of status epilepticus within 3 days after initiation of treatments. Status epilepticus resolved for 21 of 26 patients in the DAG group (81%), versus 9 of 22 patients in the NAG group (41%; odds ratio, 6.06; 95% confidence interval, 1.66-22.12; P = .005).

For secondary efficacy outcomes, there was a trend in favor of DAG, but differences from the NAG group were not statistically significant. In the groups, 46% versus 32% awakened and responded to commands before discharge from the intensive care unit, and 32% versus 23% showed good neurologic outcome at 6 months.

The primary safety outcome of all-cause mortality risk in the ICU was 90% lower for patients treated with DAG than for those treated with NAG (15% vs. 64%; OR, 0.1; 95% CI, 0.02-0.41; P < .01). Dr. Beretta explained that the high mortality rate in the NAG group was presumably a result of unresolved status epilepticus.

The secondary safety outcome of a transitory rise of gamma-glutamyl transferase greater than three times the upper limit of normal in the DAG group was expected with high-dose perampanel, the investigators noted. This outcome occurred in 77% of the DAG group versus 27% of the NAG group (OR, 9.88; 95% CI, 2.4-32.9; P < .001).

There was no statistically significant difference in incidence of recurrent cardiac arrest during therapy. This occurred in one member of the DAG group and in none in the NAG group.

Dr. Beretta reported that their investigations are still in a retrospective phase, but the researchers plan to move the work into a prospective phase and possibly a randomized trial soon.
 

Fascinating, promising

Commenting on the findings, Jaysingh Singh, MD, co-director of the Epilepsy Surgery Center at the Ohio State University Wexner Medical Center, Columbus, said the study provides “fascinating, very helpful data” about a condition that has responded well to current treatment options.

He added that his center has used “the innovative treatments” discussed in the study for a few patients.

“More concrete evidence will push us to use it more uniformly across all our patient population [that] has refractory status. So I’m very optimistic, and the data were very promising,” said Dr. Singh, who was not involved with the research.

He cautioned that the study was retrospective, not randomized or controlled, and that it involved a small number of patients but said that the data were “heading in the right direction.”

Although resolution of status epilepticus was better among patients in the DAG group than in the NAG group, the awakenings and neurologic outcomes were “pretty much same as standard medical therapy, which we commonly give to our patients,” said Dr. Singh. “We see this phenomenon all the time in our patients.”

He noted that other factors can determine how patients respond, such as conditions of the heart or kidneys, the presence of sepsis, and multiorgan dysfunction. These factors were not controlled for in the study.

Nonetheless, he said the study achieved its primary endpoint of better resolution of status epilepticus “because that’s the first thing you want to see: whether the treatment is taking care of that.”

The study received no outside funding. Dr. Beretta and Dr. Singh have disclosed no relevant financial relationships.

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

Baby-wearing – carrying a child against your body in a sling, soft carrier, or other device – is associated with benefits like reduced crying and increased breastfeeding, studies have shown.

But this practice also entails risks. Babies can fall out of carriers, or be injured when an adult carrying them falls, for example.

In the past decade, thousands of children were seen at EDs in the United States with injuries related to baby-wearing products, researchers estimated in a study presented at the annual meeting of the American Academy of Pediatrics.

To characterize the epidemiology of these injuries, Samantha J. Rowe, MD, chief resident physician at Walter Reed National Military Medical Center in Bethesda, Md., and colleagues analyzed data from the National Electronic Injury Surveillance System between 2011 and 2020.

They included in their analysis data from patients aged 5 years and younger who sustained an injury associated with a baby-wearing product. Baby harnesses, carriers, slings, framed baby carriers, and soft baby carriers were among the devices included in the study. The researchers used 601 cases to generate national estimates.

An estimated 14,024 patients presented to EDs because of baby-wearing injuries, and 52% of the injuries occurred when a patient fell from the product.

Most injuries (61%) occurred in children aged 5 months and younger; 19.3% of these infants required hospitalization, most often for head injuries.

The investigators found that about 22% of the injuries were associated with a caregiver falling, noted Rachel Y. Moon, MD, who was not involved in the study.

“Carrying a baby changes your center of gravity – and can also obscure your vision of where you’re walking, so adults who use these devices should be cognizant of this,” said Dr. Moon, with the University of Virginia, Charlottesville.

Dr. Rowe often practiced baby-wearing with her daughter, and found that it was beneficial. And studies have demonstrated various benefits of baby-wearing, including improved thermoregulation and glycemic control.

Still, the new analysis illustrates the potential for baby-wearing products “to cause serious injury, especially in infants 5 months and younger,” Dr. Rowe said. “We need to provide more education to caregivers on safe baby-wearing and continue to improve our safety standards for baby-wearing products.”

Study coauthor Patrick T. Reeves, MD, with the Naval Medical Center at San Diego, offered additional guidance in a news release: “Like when buying a new pair of shoes, parents must be educated on the proper sizing, selection, and wear of baby carriers to prevent injury to themselves and their child.”

Parents also need to ensure that the child’s nose and mouth are not obstructed, Dr. Moon

In a recent article discussing the possible benefits of baby-wearing in terms of helping with breastfeeding, Dr. Moon also pointed out further safety considerations: “No matter which carrier is used, for safety reasons, we need to remind parents that the baby should be positioned so that the head is upright and the nose and mouth are not obstructed.”

The researchers and Dr. Moon had no relevant financial disclosures.

[email protected]

Baby-wearing – carrying a child against your body in a sling, soft carrier, or other device – is associated with benefits like reduced crying and increased breastfeeding, studies have shown.

But this practice also entails risks. Babies can fall out of carriers, or be injured when an adult carrying them falls, for example.

In the past decade, thousands of children were seen at EDs in the United States with injuries related to baby-wearing products, researchers estimated in a study presented at the annual meeting of the American Academy of Pediatrics.

To characterize the epidemiology of these injuries, Samantha J. Rowe, MD, chief resident physician at Walter Reed National Military Medical Center in Bethesda, Md., and colleagues analyzed data from the National Electronic Injury Surveillance System between 2011 and 2020.

They included in their analysis data from patients aged 5 years and younger who sustained an injury associated with a baby-wearing product. Baby harnesses, carriers, slings, framed baby carriers, and soft baby carriers were among the devices included in the study. The researchers used 601 cases to generate national estimates.

An estimated 14,024 patients presented to EDs because of baby-wearing injuries, and 52% of the injuries occurred when a patient fell from the product.

Most injuries (61%) occurred in children aged 5 months and younger; 19.3% of these infants required hospitalization, most often for head injuries.

The investigators found that about 22% of the injuries were associated with a caregiver falling, noted Rachel Y. Moon, MD, who was not involved in the study.

“Carrying a baby changes your center of gravity – and can also obscure your vision of where you’re walking, so adults who use these devices should be cognizant of this,” said Dr. Moon, with the University of Virginia, Charlottesville.

Dr. Rowe often practiced baby-wearing with her daughter, and found that it was beneficial. And studies have demonstrated various benefits of baby-wearing, including improved thermoregulation and glycemic control.

Still, the new analysis illustrates the potential for baby-wearing products “to cause serious injury, especially in infants 5 months and younger,” Dr. Rowe said. “We need to provide more education to caregivers on safe baby-wearing and continue to improve our safety standards for baby-wearing products.”

Study coauthor Patrick T. Reeves, MD, with the Naval Medical Center at San Diego, offered additional guidance in a news release: “Like when buying a new pair of shoes, parents must be educated on the proper sizing, selection, and wear of baby carriers to prevent injury to themselves and their child.”

Parents also need to ensure that the child’s nose and mouth are not obstructed, Dr. Moon

In a recent article discussing the possible benefits of baby-wearing in terms of helping with breastfeeding, Dr. Moon also pointed out further safety considerations: “No matter which carrier is used, for safety reasons, we need to remind parents that the baby should be positioned so that the head is upright and the nose and mouth are not obstructed.”

The researchers and Dr. Moon had no relevant financial disclosures.

[email protected]

Baby-wearing – carrying a child against your body in a sling, soft carrier, or other device – is associated with benefits like reduced crying and increased breastfeeding, studies have shown.

But this practice also entails risks. Babies can fall out of carriers, or be injured when an adult carrying them falls, for example.

In the past decade, thousands of children were seen at EDs in the United States with injuries related to baby-wearing products, researchers estimated in a study presented at the annual meeting of the American Academy of Pediatrics.

To characterize the epidemiology of these injuries, Samantha J. Rowe, MD, chief resident physician at Walter Reed National Military Medical Center in Bethesda, Md., and colleagues analyzed data from the National Electronic Injury Surveillance System between 2011 and 2020.

They included in their analysis data from patients aged 5 years and younger who sustained an injury associated with a baby-wearing product. Baby harnesses, carriers, slings, framed baby carriers, and soft baby carriers were among the devices included in the study. The researchers used 601 cases to generate national estimates.

An estimated 14,024 patients presented to EDs because of baby-wearing injuries, and 52% of the injuries occurred when a patient fell from the product.

Most injuries (61%) occurred in children aged 5 months and younger; 19.3% of these infants required hospitalization, most often for head injuries.

The investigators found that about 22% of the injuries were associated with a caregiver falling, noted Rachel Y. Moon, MD, who was not involved in the study.

“Carrying a baby changes your center of gravity – and can also obscure your vision of where you’re walking, so adults who use these devices should be cognizant of this,” said Dr. Moon, with the University of Virginia, Charlottesville.

Dr. Rowe often practiced baby-wearing with her daughter, and found that it was beneficial. And studies have demonstrated various benefits of baby-wearing, including improved thermoregulation and glycemic control.

Still, the new analysis illustrates the potential for baby-wearing products “to cause serious injury, especially in infants 5 months and younger,” Dr. Rowe said. “We need to provide more education to caregivers on safe baby-wearing and continue to improve our safety standards for baby-wearing products.”

Study coauthor Patrick T. Reeves, MD, with the Naval Medical Center at San Diego, offered additional guidance in a news release: “Like when buying a new pair of shoes, parents must be educated on the proper sizing, selection, and wear of baby carriers to prevent injury to themselves and their child.”

Parents also need to ensure that the child’s nose and mouth are not obstructed, Dr. Moon

In a recent article discussing the possible benefits of baby-wearing in terms of helping with breastfeeding, Dr. Moon also pointed out further safety considerations: “No matter which carrier is used, for safety reasons, we need to remind parents that the baby should be positioned so that the head is upright and the nose and mouth are not obstructed.”

The researchers and Dr. Moon had no relevant financial disclosures.

[email protected]

Genetic testing in patients with epilepsy can yield useful information that informs treatment and improves seizure control and other outcomes, new research shows.

Results of a survey that included more than 400 patients showed that positive findings from genetic testing helped guide clinical management in 50% of cases and improved patient outcomes in 75%. In addition, the findings were applicable to both children and adults.

“Fifty percent of the time the physicians reported that, yes, receiving the genetic diagnosis did change how they managed the patients,” reported co-investigator Dianalee McKnight, PhD, director of medical affairs at Invitae, a medical genetic testing company headquartered in San Francisco. In 81.3% of cases, providers reported they changed clinical management within 3 months of receiving the genetic results, she added.

The findings were presented at the 2021 World Congress of Neurology (WCN).
 

Test results can be practice-changing

Nearly 50% of positive genetic test results in epilepsy patients can help guide clinical management, Dr. McKnight noted. However, information on how physicians use genetic information in decision-making has been limited, prompting her conduct the survey.

A total of 1,567 physicians with 3,572 patients who had a definitive diagnosis of epilepsy were contacted. A total of 170 (10.8%) clinicians provided completed and eligible surveys on 429 patients with epilepsy.

The patient cohort comprised mostly children, with nearly 50 adults, which Dr. McKnight said is typical of the population receiving genetic testing in clinical practice.

She reported that genetic testing results prompted clinicians to make medication changes about 50% of the time. Other changes included specialist referral or to a clinical trial, monitoring for other neurological disease, and recommendations for dietary change or for surgery.

Growing influence of genetic testing

Commenting on the findings, Jaysingh Singh, MD, co-director of the Epilepsy Surgery Center at the Ohio State University Wexner Medical Center in Columbus, noted that the study highlights the value of gene testing in improving outcomes in patients with epilepsy, particularly the pediatric population.

He said the findings make him optimistic about the potential of genetic testing in adult patients – with at least one caveat.

“The limitation is that if we do find some mutation, we don’t know what to do with that. That’s definitely one challenge. And we see that more often in the adult patient population,” said Dr. Singh, who was not involved with the research.

He noted that there is a small group of genetic mutations when, found in adults, may dramatically alter treatment.

For example, he noted that if there is a gene mutation related to mTOR pathways, that could provide a future target because there are already medications that target this pathway.

Genetic testing may also be useful in cases where patients have normal brain imaging and poor response to standard treatment or in cases where patients have congenital abnormalities such as intellectual impairment or facial dysmorphic features and a co-morbid seizure disorder, he said.

Dr. Singh noted that he has often found genetic testing impractical because “if I order DNA testing right now, it will take 4 months for me to get the results. I cannot wait 4 months for the results to come back” to adjust treatment.

Dr. McKnight is an employee of and a shareholder in Invitae, which funded the study. Dr. Singh has disclosed no relevant financial relationships.

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

Genetic testing in patients with epilepsy can yield useful information that informs treatment and improves seizure control and other outcomes, new research shows.

Results of a survey that included more than 400 patients showed that positive findings from genetic testing helped guide clinical management in 50% of cases and improved patient outcomes in 75%. In addition, the findings were applicable to both children and adults.

“Fifty percent of the time the physicians reported that, yes, receiving the genetic diagnosis did change how they managed the patients,” reported co-investigator Dianalee McKnight, PhD, director of medical affairs at Invitae, a medical genetic testing company headquartered in San Francisco. In 81.3% of cases, providers reported they changed clinical management within 3 months of receiving the genetic results, she added.

The findings were presented at the 2021 World Congress of Neurology (WCN).
 

Test results can be practice-changing

Nearly 50% of positive genetic test results in epilepsy patients can help guide clinical management, Dr. McKnight noted. However, information on how physicians use genetic information in decision-making has been limited, prompting her conduct the survey.

A total of 1,567 physicians with 3,572 patients who had a definitive diagnosis of epilepsy were contacted. A total of 170 (10.8%) clinicians provided completed and eligible surveys on 429 patients with epilepsy.

The patient cohort comprised mostly children, with nearly 50 adults, which Dr. McKnight said is typical of the population receiving genetic testing in clinical practice.

She reported that genetic testing results prompted clinicians to make medication changes about 50% of the time. Other changes included specialist referral or to a clinical trial, monitoring for other neurological disease, and recommendations for dietary change or for surgery.

Growing influence of genetic testing

Commenting on the findings, Jaysingh Singh, MD, co-director of the Epilepsy Surgery Center at the Ohio State University Wexner Medical Center in Columbus, noted that the study highlights the value of gene testing in improving outcomes in patients with epilepsy, particularly the pediatric population.

He said the findings make him optimistic about the potential of genetic testing in adult patients – with at least one caveat.

“The limitation is that if we do find some mutation, we don’t know what to do with that. That’s definitely one challenge. And we see that more often in the adult patient population,” said Dr. Singh, who was not involved with the research.

He noted that there is a small group of genetic mutations when, found in adults, may dramatically alter treatment.

For example, he noted that if there is a gene mutation related to mTOR pathways, that could provide a future target because there are already medications that target this pathway.

Genetic testing may also be useful in cases where patients have normal brain imaging and poor response to standard treatment or in cases where patients have congenital abnormalities such as intellectual impairment or facial dysmorphic features and a co-morbid seizure disorder, he said.

Dr. Singh noted that he has often found genetic testing impractical because “if I order DNA testing right now, it will take 4 months for me to get the results. I cannot wait 4 months for the results to come back” to adjust treatment.

Dr. McKnight is an employee of and a shareholder in Invitae, which funded the study. Dr. Singh has disclosed no relevant financial relationships.

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

Genetic testing in patients with epilepsy can yield useful information that informs treatment and improves seizure control and other outcomes, new research shows.

Results of a survey that included more than 400 patients showed that positive findings from genetic testing helped guide clinical management in 50% of cases and improved patient outcomes in 75%. In addition, the findings were applicable to both children and adults.

“Fifty percent of the time the physicians reported that, yes, receiving the genetic diagnosis did change how they managed the patients,” reported co-investigator Dianalee McKnight, PhD, director of medical affairs at Invitae, a medical genetic testing company headquartered in San Francisco. In 81.3% of cases, providers reported they changed clinical management within 3 months of receiving the genetic results, she added.

The findings were presented at the 2021 World Congress of Neurology (WCN).
 

Test results can be practice-changing

Nearly 50% of positive genetic test results in epilepsy patients can help guide clinical management, Dr. McKnight noted. However, information on how physicians use genetic information in decision-making has been limited, prompting her conduct the survey.

A total of 1,567 physicians with 3,572 patients who had a definitive diagnosis of epilepsy were contacted. A total of 170 (10.8%) clinicians provided completed and eligible surveys on 429 patients with epilepsy.

The patient cohort comprised mostly children, with nearly 50 adults, which Dr. McKnight said is typical of the population receiving genetic testing in clinical practice.

She reported that genetic testing results prompted clinicians to make medication changes about 50% of the time. Other changes included specialist referral or to a clinical trial, monitoring for other neurological disease, and recommendations for dietary change or for surgery.

Growing influence of genetic testing

Commenting on the findings, Jaysingh Singh, MD, co-director of the Epilepsy Surgery Center at the Ohio State University Wexner Medical Center in Columbus, noted that the study highlights the value of gene testing in improving outcomes in patients with epilepsy, particularly the pediatric population.

He said the findings make him optimistic about the potential of genetic testing in adult patients – with at least one caveat.

“The limitation is that if we do find some mutation, we don’t know what to do with that. That’s definitely one challenge. And we see that more often in the adult patient population,” said Dr. Singh, who was not involved with the research.

He noted that there is a small group of genetic mutations when, found in adults, may dramatically alter treatment.

For example, he noted that if there is a gene mutation related to mTOR pathways, that could provide a future target because there are already medications that target this pathway.

Genetic testing may also be useful in cases where patients have normal brain imaging and poor response to standard treatment or in cases where patients have congenital abnormalities such as intellectual impairment or facial dysmorphic features and a co-morbid seizure disorder, he said.

Dr. Singh noted that he has often found genetic testing impractical because “if I order DNA testing right now, it will take 4 months for me to get the results. I cannot wait 4 months for the results to come back” to adjust treatment.

Dr. McKnight is an employee of and a shareholder in Invitae, which funded the study. Dr. Singh has disclosed no relevant financial relationships.

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

New draft recommendations from the U.S. Preventive Services Task Force (USPSTF) on the use of aspirin for the primary prevention of cardiovascular disease (CVD) have been released and appear to limit the population in which it should be considered.  

David Sucsy/iStockphoto

“The USPSTF concludes with moderate certainty that aspirin use for the primary prevention of CVD events in adults ages 40 to 59 years who have a 10% or greater 10-year CVD risk has a small net benefit,” the recommendation notes. They conclude that for these patients, the decision to use aspirin “should be an individual one.”

“Persons who are not at increased risk for bleeding and are willing to take low-dose aspirin daily are more likely to benefit,” they note.

For older individuals, however, “The USPSTF concludes with moderate certainty that initiating aspirin use for the primary prevention of CVD events in adults age 60 years or older has no net benefit,” the task force concludes.

The new recommendations were posted online Oct. 12 and will be available for public comment until November 8. Once it is finalized, the recommendation will replace the 2016 USPSTF recommendation on aspirin use to prevent CVD and colorectal cancer (CRC), they note.

In that document, the task force recommended initiating low-dose aspirin for the primary prevention of both CVD and CRC in adults 50-59 years of age who had a 10% or greater 10-year CVD risk, were not at increased risk for bleeding, had a life expectancy of at least 10 years, and were willing to take daily low-dose aspirin for at least 10 years, with the decision to start being an individual one.

For older and younger patients, they found at that time that the evidence was “insufficient to assess the balance of benefits and harms of initiating aspirin use for the primary prevention of CVD and CRC in adults younger than age 50 years or adults aged 70 years or older.”

In the new draft document, “the USPSTF has changed the age ranges and grades of its recommendation on aspirin use.” Besides the recommendations for CVD prevention, they have also changed the previous recommendation of aspirin for the prevention of CRC given evidence generated from large primary CVD prevention trials.

“Based on new analyses of the evidence from primary CVD prevention populations, longer-term follow-up data from the Women’s Health Study (WHS) (JE Buring, personal communication, November 23, 2020), and new trial evidence, the USPSTF concluded that the evidence is inadequate that low-dose aspirin use reduces CRC incidence or mortality,” it states.  
 

Optimum dose

On the optimum dose for primary CVD prevention, the task force says the benefit appears similar for a low dose (≤100 mg/d) and all doses that have been studied in CVD prevention trials (50 to 500 mg/d). “A pragmatic approach would be to use 81 mg/d, which is the most commonly prescribed dose in the United States,” it states.

The USPSTF recommends using the ACC/AHA Pooled Cohort Equations to estimate cardiovascular risk but it points out that these equations are imperfect for risk prediction at the individual level, and suggests using these risk estimates as a starting point to discuss with appropriate candidates their desire for daily aspirin use. The benefits of initiating aspirin use are greater for individuals at higher risk for CVD events (eg, those with >15% or >20% 10-year CVD risk), they note.

“Decisions about initiating aspirin use should be based on shared decision-making between clinicians and patients about the potential benefits and harms. Persons who place a higher value on the potential benefits than the potential harms may choose to initiate low-dose aspirin use. Persons who place a higher value on the potential harms or on the burden of taking a daily preventive medication than the potential benefits may choose not to initiate low-dose aspirin use,” the task force says.

It also points out that the risk for bleeding increases modestly with advancing age. “For persons who have initiated aspirin use, the net benefits continue to accrue over time in the absence of a bleeding event. The net benefits, however, become smaller with advancing age because of an increased risk for bleeding, so modeling data suggest that it may be reasonable to consider stopping aspirin use around age 75 years,” it states.
 

Systematic review

The updated draft recommendations are based on a new systematic review commissioned by the USPSTF on the effectiveness of aspirin to reduce the risk of CVD events (myocardial infarction and stroke), cardiovascular mortality, and all-cause mortality in persons without a history of CVD.

The systematic review also investigated the effect of aspirin use on CRC incidence and mortality in primary CVD prevention populations, as well as the harms, particularly bleeding harms, associated with aspirin use.

In addition to the systematic evidence review, the USPSTF commissioned a microsimulation modeling study to assess the net balance of benefits and harms from aspirin use for primary prevention of CVD and CRC, stratified by age, sex, and CVD risk level. Modeling study parameter inputs were informed by the results of the systematic review, and the primary outcomes were net benefits expressed as quality-adjusted life-years and life-years. 

The USPSTF found 13 randomized clinical trials (RCTs) that reported on the benefits of aspirin use for the primary prevention of cardiovascular morbidity and mortality. The total number of participants was 161,680, and most trials used low-dose aspirin of 100 mg/d or less or aspirin every other day. The 13 primary prevention trials included a balanced number of male and female participants and included a broad distribution of ages, with mean age ranging from 53 years in the Physicians’ Health Study to 74 years in the ASPREE trial.

This body of evidence shows that aspirin use for primary prevention of CVD is associated with a decreased risk of myocardial infarction and stroke but not cardiovascular mortality or all-cause mortality. Results are quite similar when including studies using all doses of aspirin compared with studies using low-dose aspirin.

The USPSTF reviewed 14 RCTs in CVD primary prevention populations that reported on the bleeding harms of aspirin.

When looking at studies reporting on the harms of low-dose aspirin use (≤100 mg/d), which is most relevant to current practice, a pooled analysis of 10 trials showed that aspirin use was associated with a 58% increase in major gastrointestinal bleeding, and a pooled analysis of 11 trials showed a 31% increase in intracranial bleeds in the aspirin group compared with the control group. Low-dose aspirin use was not associated with a statistically significant increase in risk of fatal hemorrhagic stroke.

Data suggested that the increased risk of bleeding associated with aspirin use occurs relatively quickly after initiating aspirin, and data do not suggest that aspirin has a differential relative bleeding risk based on age, sex, presence of diabetes, level of CVD risk, or race or ethnicity. Although the increase in relative risk does not appear to differ based on age, the absolute risk of bleeding, and thus the magnitude of bleeding harm, does increase with age, and more so in adults age 60 years or older, they note.

The microsimulation model to estimate the magnitude of net benefit of low-dose aspirin use incorporated findings from the systematic review.

Modeling data demonstrated that aspirin use in both men and women ages 40-59 years with 10% or greater 10-year CVD risk generally provides a modest net benefit in both quality-adjusted life-years and life-years gained. Initiation of aspirin use in persons aged 60-69 years results in quality-adjusted life-years gained that range from slightly negative to slightly positive depending on CVD risk level, and life-years gained are generally negative.

In persons aged 70-79 years, initiation of aspirin use results in a loss of both quality-adjusted life-years and life-years at essentially all CVD risk levels modeled (ie, up to 20% 10-year CVD risk).

The USPSTF thus determined that aspirin use has a small net benefit in persons aged 40-59 years with 10% or greater 10-year CVD risk, and initiation of aspirin use has no net benefit in persons age 60 years or older.

When looking at net lifetime benefit of continuous aspirin use until stopping at age 65, 70, 75, 80, or 85 years, modeling data suggest that there is generally little incremental lifetime net benefit in continuing aspirin use beyond the age of 75-80 years.

The task force points out that the net benefit of continuing aspirin use by a person in their 60s or 70s is not the same as the net benefit of initiating aspirin use by a person in their 60s or 70s. This is because, in part, of the fact that CVD risk is heavily influenced by age. Persons who meet the eligibility criteria for aspirin use at a younger age (ie, ≥10% 10-year CVD risk in their 40s or 50s) typically have even higher CVD risk by their 60s or 70s compared with persons who first reach a 10% or greater 10-year CVD risk in their 60s or 70s, and may gain more benefit by continuing aspirin use than a person at lower risk might gain by initiating aspirin use, the USPSTF explains.

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

New draft recommendations from the U.S. Preventive Services Task Force (USPSTF) on the use of aspirin for the primary prevention of cardiovascular disease (CVD) have been released and appear to limit the population in which it should be considered.  

David Sucsy/iStockphoto

“The USPSTF concludes with moderate certainty that aspirin use for the primary prevention of CVD events in adults ages 40 to 59 years who have a 10% or greater 10-year CVD risk has a small net benefit,” the recommendation notes. They conclude that for these patients, the decision to use aspirin “should be an individual one.”

“Persons who are not at increased risk for bleeding and are willing to take low-dose aspirin daily are more likely to benefit,” they note.

For older individuals, however, “The USPSTF concludes with moderate certainty that initiating aspirin use for the primary prevention of CVD events in adults age 60 years or older has no net benefit,” the task force concludes.

The new recommendations were posted online Oct. 12 and will be available for public comment until November 8. Once it is finalized, the recommendation will replace the 2016 USPSTF recommendation on aspirin use to prevent CVD and colorectal cancer (CRC), they note.

In that document, the task force recommended initiating low-dose aspirin for the primary prevention of both CVD and CRC in adults 50-59 years of age who had a 10% or greater 10-year CVD risk, were not at increased risk for bleeding, had a life expectancy of at least 10 years, and were willing to take daily low-dose aspirin for at least 10 years, with the decision to start being an individual one.

For older and younger patients, they found at that time that the evidence was “insufficient to assess the balance of benefits and harms of initiating aspirin use for the primary prevention of CVD and CRC in adults younger than age 50 years or adults aged 70 years or older.”

In the new draft document, “the USPSTF has changed the age ranges and grades of its recommendation on aspirin use.” Besides the recommendations for CVD prevention, they have also changed the previous recommendation of aspirin for the prevention of CRC given evidence generated from large primary CVD prevention trials.

“Based on new analyses of the evidence from primary CVD prevention populations, longer-term follow-up data from the Women’s Health Study (WHS) (JE Buring, personal communication, November 23, 2020), and new trial evidence, the USPSTF concluded that the evidence is inadequate that low-dose aspirin use reduces CRC incidence or mortality,” it states.  
 

Optimum dose

On the optimum dose for primary CVD prevention, the task force says the benefit appears similar for a low dose (≤100 mg/d) and all doses that have been studied in CVD prevention trials (50 to 500 mg/d). “A pragmatic approach would be to use 81 mg/d, which is the most commonly prescribed dose in the United States,” it states.

The USPSTF recommends using the ACC/AHA Pooled Cohort Equations to estimate cardiovascular risk but it points out that these equations are imperfect for risk prediction at the individual level, and suggests using these risk estimates as a starting point to discuss with appropriate candidates their desire for daily aspirin use. The benefits of initiating aspirin use are greater for individuals at higher risk for CVD events (eg, those with >15% or >20% 10-year CVD risk), they note.

“Decisions about initiating aspirin use should be based on shared decision-making between clinicians and patients about the potential benefits and harms. Persons who place a higher value on the potential benefits than the potential harms may choose to initiate low-dose aspirin use. Persons who place a higher value on the potential harms or on the burden of taking a daily preventive medication than the potential benefits may choose not to initiate low-dose aspirin use,” the task force says.

It also points out that the risk for bleeding increases modestly with advancing age. “For persons who have initiated aspirin use, the net benefits continue to accrue over time in the absence of a bleeding event. The net benefits, however, become smaller with advancing age because of an increased risk for bleeding, so modeling data suggest that it may be reasonable to consider stopping aspirin use around age 75 years,” it states.
 

Systematic review

The updated draft recommendations are based on a new systematic review commissioned by the USPSTF on the effectiveness of aspirin to reduce the risk of CVD events (myocardial infarction and stroke), cardiovascular mortality, and all-cause mortality in persons without a history of CVD.

The systematic review also investigated the effect of aspirin use on CRC incidence and mortality in primary CVD prevention populations, as well as the harms, particularly bleeding harms, associated with aspirin use.

In addition to the systematic evidence review, the USPSTF commissioned a microsimulation modeling study to assess the net balance of benefits and harms from aspirin use for primary prevention of CVD and CRC, stratified by age, sex, and CVD risk level. Modeling study parameter inputs were informed by the results of the systematic review, and the primary outcomes were net benefits expressed as quality-adjusted life-years and life-years. 

The USPSTF found 13 randomized clinical trials (RCTs) that reported on the benefits of aspirin use for the primary prevention of cardiovascular morbidity and mortality. The total number of participants was 161,680, and most trials used low-dose aspirin of 100 mg/d or less or aspirin every other day. The 13 primary prevention trials included a balanced number of male and female participants and included a broad distribution of ages, with mean age ranging from 53 years in the Physicians’ Health Study to 74 years in the ASPREE trial.

This body of evidence shows that aspirin use for primary prevention of CVD is associated with a decreased risk of myocardial infarction and stroke but not cardiovascular mortality or all-cause mortality. Results are quite similar when including studies using all doses of aspirin compared with studies using low-dose aspirin.

The USPSTF reviewed 14 RCTs in CVD primary prevention populations that reported on the bleeding harms of aspirin.

When looking at studies reporting on the harms of low-dose aspirin use (≤100 mg/d), which is most relevant to current practice, a pooled analysis of 10 trials showed that aspirin use was associated with a 58% increase in major gastrointestinal bleeding, and a pooled analysis of 11 trials showed a 31% increase in intracranial bleeds in the aspirin group compared with the control group. Low-dose aspirin use was not associated with a statistically significant increase in risk of fatal hemorrhagic stroke.

Data suggested that the increased risk of bleeding associated with aspirin use occurs relatively quickly after initiating aspirin, and data do not suggest that aspirin has a differential relative bleeding risk based on age, sex, presence of diabetes, level of CVD risk, or race or ethnicity. Although the increase in relative risk does not appear to differ based on age, the absolute risk of bleeding, and thus the magnitude of bleeding harm, does increase with age, and more so in adults age 60 years or older, they note.

The microsimulation model to estimate the magnitude of net benefit of low-dose aspirin use incorporated findings from the systematic review.

Modeling data demonstrated that aspirin use in both men and women ages 40-59 years with 10% or greater 10-year CVD risk generally provides a modest net benefit in both quality-adjusted life-years and life-years gained. Initiation of aspirin use in persons aged 60-69 years results in quality-adjusted life-years gained that range from slightly negative to slightly positive depending on CVD risk level, and life-years gained are generally negative.

In persons aged 70-79 years, initiation of aspirin use results in a loss of both quality-adjusted life-years and life-years at essentially all CVD risk levels modeled (ie, up to 20% 10-year CVD risk).

The USPSTF thus determined that aspirin use has a small net benefit in persons aged 40-59 years with 10% or greater 10-year CVD risk, and initiation of aspirin use has no net benefit in persons age 60 years or older.

When looking at net lifetime benefit of continuous aspirin use until stopping at age 65, 70, 75, 80, or 85 years, modeling data suggest that there is generally little incremental lifetime net benefit in continuing aspirin use beyond the age of 75-80 years.

The task force points out that the net benefit of continuing aspirin use by a person in their 60s or 70s is not the same as the net benefit of initiating aspirin use by a person in their 60s or 70s. This is because, in part, of the fact that CVD risk is heavily influenced by age. Persons who meet the eligibility criteria for aspirin use at a younger age (ie, ≥10% 10-year CVD risk in their 40s or 50s) typically have even higher CVD risk by their 60s or 70s compared with persons who first reach a 10% or greater 10-year CVD risk in their 60s or 70s, and may gain more benefit by continuing aspirin use than a person at lower risk might gain by initiating aspirin use, the USPSTF explains.

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

New draft recommendations from the U.S. Preventive Services Task Force (USPSTF) on the use of aspirin for the primary prevention of cardiovascular disease (CVD) have been released and appear to limit the population in which it should be considered.  

David Sucsy/iStockphoto

“The USPSTF concludes with moderate certainty that aspirin use for the primary prevention of CVD events in adults ages 40 to 59 years who have a 10% or greater 10-year CVD risk has a small net benefit,” the recommendation notes. They conclude that for these patients, the decision to use aspirin “should be an individual one.”

“Persons who are not at increased risk for bleeding and are willing to take low-dose aspirin daily are more likely to benefit,” they note.

For older individuals, however, “The USPSTF concludes with moderate certainty that initiating aspirin use for the primary prevention of CVD events in adults age 60 years or older has no net benefit,” the task force concludes.

The new recommendations were posted online Oct. 12 and will be available for public comment until November 8. Once it is finalized, the recommendation will replace the 2016 USPSTF recommendation on aspirin use to prevent CVD and colorectal cancer (CRC), they note.

In that document, the task force recommended initiating low-dose aspirin for the primary prevention of both CVD and CRC in adults 50-59 years of age who had a 10% or greater 10-year CVD risk, were not at increased risk for bleeding, had a life expectancy of at least 10 years, and were willing to take daily low-dose aspirin for at least 10 years, with the decision to start being an individual one.

For older and younger patients, they found at that time that the evidence was “insufficient to assess the balance of benefits and harms of initiating aspirin use for the primary prevention of CVD and CRC in adults younger than age 50 years or adults aged 70 years or older.”

In the new draft document, “the USPSTF has changed the age ranges and grades of its recommendation on aspirin use.” Besides the recommendations for CVD prevention, they have also changed the previous recommendation of aspirin for the prevention of CRC given evidence generated from large primary CVD prevention trials.

“Based on new analyses of the evidence from primary CVD prevention populations, longer-term follow-up data from the Women’s Health Study (WHS) (JE Buring, personal communication, November 23, 2020), and new trial evidence, the USPSTF concluded that the evidence is inadequate that low-dose aspirin use reduces CRC incidence or mortality,” it states.  
 

Optimum dose

On the optimum dose for primary CVD prevention, the task force says the benefit appears similar for a low dose (≤100 mg/d) and all doses that have been studied in CVD prevention trials (50 to 500 mg/d). “A pragmatic approach would be to use 81 mg/d, which is the most commonly prescribed dose in the United States,” it states.

The USPSTF recommends using the ACC/AHA Pooled Cohort Equations to estimate cardiovascular risk but it points out that these equations are imperfect for risk prediction at the individual level, and suggests using these risk estimates as a starting point to discuss with appropriate candidates their desire for daily aspirin use. The benefits of initiating aspirin use are greater for individuals at higher risk for CVD events (eg, those with >15% or >20% 10-year CVD risk), they note.

“Decisions about initiating aspirin use should be based on shared decision-making between clinicians and patients about the potential benefits and harms. Persons who place a higher value on the potential benefits than the potential harms may choose to initiate low-dose aspirin use. Persons who place a higher value on the potential harms or on the burden of taking a daily preventive medication than the potential benefits may choose not to initiate low-dose aspirin use,” the task force says.

It also points out that the risk for bleeding increases modestly with advancing age. “For persons who have initiated aspirin use, the net benefits continue to accrue over time in the absence of a bleeding event. The net benefits, however, become smaller with advancing age because of an increased risk for bleeding, so modeling data suggest that it may be reasonable to consider stopping aspirin use around age 75 years,” it states.
 

Systematic review

The updated draft recommendations are based on a new systematic review commissioned by the USPSTF on the effectiveness of aspirin to reduce the risk of CVD events (myocardial infarction and stroke), cardiovascular mortality, and all-cause mortality in persons without a history of CVD.

The systematic review also investigated the effect of aspirin use on CRC incidence and mortality in primary CVD prevention populations, as well as the harms, particularly bleeding harms, associated with aspirin use.

In addition to the systematic evidence review, the USPSTF commissioned a microsimulation modeling study to assess the net balance of benefits and harms from aspirin use for primary prevention of CVD and CRC, stratified by age, sex, and CVD risk level. Modeling study parameter inputs were informed by the results of the systematic review, and the primary outcomes were net benefits expressed as quality-adjusted life-years and life-years. 

The USPSTF found 13 randomized clinical trials (RCTs) that reported on the benefits of aspirin use for the primary prevention of cardiovascular morbidity and mortality. The total number of participants was 161,680, and most trials used low-dose aspirin of 100 mg/d or less or aspirin every other day. The 13 primary prevention trials included a balanced number of male and female participants and included a broad distribution of ages, with mean age ranging from 53 years in the Physicians’ Health Study to 74 years in the ASPREE trial.

This body of evidence shows that aspirin use for primary prevention of CVD is associated with a decreased risk of myocardial infarction and stroke but not cardiovascular mortality or all-cause mortality. Results are quite similar when including studies using all doses of aspirin compared with studies using low-dose aspirin.

The USPSTF reviewed 14 RCTs in CVD primary prevention populations that reported on the bleeding harms of aspirin.

When looking at studies reporting on the harms of low-dose aspirin use (≤100 mg/d), which is most relevant to current practice, a pooled analysis of 10 trials showed that aspirin use was associated with a 58% increase in major gastrointestinal bleeding, and a pooled analysis of 11 trials showed a 31% increase in intracranial bleeds in the aspirin group compared with the control group. Low-dose aspirin use was not associated with a statistically significant increase in risk of fatal hemorrhagic stroke.

Data suggested that the increased risk of bleeding associated with aspirin use occurs relatively quickly after initiating aspirin, and data do not suggest that aspirin has a differential relative bleeding risk based on age, sex, presence of diabetes, level of CVD risk, or race or ethnicity. Although the increase in relative risk does not appear to differ based on age, the absolute risk of bleeding, and thus the magnitude of bleeding harm, does increase with age, and more so in adults age 60 years or older, they note.

The microsimulation model to estimate the magnitude of net benefit of low-dose aspirin use incorporated findings from the systematic review.

Modeling data demonstrated that aspirin use in both men and women ages 40-59 years with 10% or greater 10-year CVD risk generally provides a modest net benefit in both quality-adjusted life-years and life-years gained. Initiation of aspirin use in persons aged 60-69 years results in quality-adjusted life-years gained that range from slightly negative to slightly positive depending on CVD risk level, and life-years gained are generally negative.

In persons aged 70-79 years, initiation of aspirin use results in a loss of both quality-adjusted life-years and life-years at essentially all CVD risk levels modeled (ie, up to 20% 10-year CVD risk).

The USPSTF thus determined that aspirin use has a small net benefit in persons aged 40-59 years with 10% or greater 10-year CVD risk, and initiation of aspirin use has no net benefit in persons age 60 years or older.

When looking at net lifetime benefit of continuous aspirin use until stopping at age 65, 70, 75, 80, or 85 years, modeling data suggest that there is generally little incremental lifetime net benefit in continuing aspirin use beyond the age of 75-80 years.

The task force points out that the net benefit of continuing aspirin use by a person in their 60s or 70s is not the same as the net benefit of initiating aspirin use by a person in their 60s or 70s. This is because, in part, of the fact that CVD risk is heavily influenced by age. Persons who meet the eligibility criteria for aspirin use at a younger age (ie, ≥10% 10-year CVD risk in their 40s or 50s) typically have even higher CVD risk by their 60s or 70s compared with persons who first reach a 10% or greater 10-year CVD risk in their 60s or 70s, and may gain more benefit by continuing aspirin use than a person at lower risk might gain by initiating aspirin use, the USPSTF explains.

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

The Diagnosis: Schwannoma

Schwannoma, also known as neurilemmoma, is a benign encapsulated neoplasm of the peripheral nerve sheath that presents as a subcutaneous nodule.¹ It also may present in the retroperitoneum, mediastinum, and viscera (eg, gastrointestinal tract, bone, upper respiratory tract, lymph nodes). It may occur as multiple lesions when associated with certain syndromes. It usually is an asymptomatic indolent tumor with neurologic symptoms, such as pain and tenderness, in the lesions that are deeper, larger, or closer in proximity to nearby structures.^2,3

Histologically, a schwannoma is encapsulated by the perineurium of the nerve bundle from which it originates (quiz image [top]). The tumor consists of hypercellular (Antoni type A) and hypocellular (Antoni type B) areas. Antoni type A areas consist of tightly packed, spindleshaped cells with elongated wavy nuclei and indistinct cytoplasmic borders. These nuclei tend to align into parallel rows with intervening anuclear zones forming Verocay bodies (quiz image [bottom]).⁴ Verocay bodies are not seen in all schwannomas, and similar formations may be seen in other tumors as well. Solitary circumscribed neuromas also have Verocay bodies, whereas dermatofibromas and leiomyomas have Verocay-like bodies. Antoni type B areas have scattered spindled or ovoid cells in an edematous or myxoid matrix interspersed with inflammatory cells such as lymphocytes and histiocytes. Vessels with thick hyalinized walls are a helpful feature in diagnosis.² Schwann cells of a schwannoma stain diffusely positive with S-100 protein. The capsule stains positively with epithelial membrane antigen due to the presence of perineurial cells.²

The morphologic variants of this entity include conventional (common, solitary), cellular, plexiform, ancient, melanotic, epithelioid, pseudoglandular, neuroblastomalike, and microcystic/reticular schwannomas. There are additional variants that are associated with genetic syndromes, such as multiple cutaneous plexiform schwannomas linked with neurofibromatosis type 2, psammomatous melanotic schwannoma presenting in Carney complex, schwannomatosis, and segmental schwannomatosis (a distinct form of neurofibromatosis characterized by multiple schwannomas localized to one limb). Either presentation may have alteration or deletion of the neurofibromatosis type 2 gene, NF2, on chromosome 22.^2,5

Nodular fasciitis is a benign tumor of fibroblasts and myofibroblasts that usually arises in the subcutaneous tissues. It most commonly occurs in the upper extremities, trunk, head, and neck. It presents as a single, often painful, rapidly growing, subcutaneous nodule. Histologically, lesions mostly are well circumscribed yet unencapsulated, in contrast to schwannomas. They may be hypocellular or hypercellular and are composed of uniform spindle cells with a feathery or fascicular (tissue culture–like) appearance in a loose, myxoid to collagenous stroma. There may be foci of hemorrhage and conspicuous mitoses but not atypical figures (Figure 1). Immunohistochemically, the cells stain positively for smooth muscle actin and negatively for S-100 protein, which sets it apart from a schwannoma. Most cases contain fusion genes, with myosin heavy chain 9 ubiquitin-specific peptidase 6, MYH9-USP6, being the most common fusion product.⁶

Solitary circumscribed neuroma (palisaded encapsulated neuroma) is a benign, usually solitary dermal lesion. It most commonly occurs in middle-aged to elderly adults as a small (<1 cm), firm, flesh-colored to pink papule on the face (ie, cheeks, nose, nasolabial folds) and less commonly in the oral and acral regions and on the eyelids and penis. The lesion usually is unilobular; however, other growth patterns such as plexiform, multilobular, and fungating variants have been identified. Histologically, it is a well-circumscribed nodule with a thin capsule of perineurium that is composed of interlacing bundles of Schwann cells with a characteristic clefting artifact (Figure 2). Cells have wavy dark nuclei with scant cytoplasm that occasionally form palisades or Verocay bodies causing these lesions to be confused with schwannomas. Immunohistochemically, the Schwann cells stain positively with S-100 protein, and the perineurium stains positively with epithelial membrane antigen, Claudin-1, and Glut-1. Neurofilament protein stains axons throughout neuromas, whereas in schwannoma, the expression often is limited to entrapped axons at the periphery of the tumor.⁷

Angioleiomyoma is an uncommon, benign, smooth muscle neoplasm of the skin and subcutaneous tissue that originates from vascular smooth muscle. It most commonly presents in adult females aged 30 to 60 years, with a predilection for the lower limbs. These tumors typically are solitary, slow growing, and less than 2 cm in diameter and may be painful upon compression. Similar to schwannoma, angioleiomyoma is an encapsulated lesion composed of interlacing, uniform, smooth muscle bundles distributed around vessels (Figure 3). Smooth muscle cells have oval- or cigar-shaped nuclei with a small perinuclear vacuole of glycogen. Immunohistochemically, there is strong diffuse staining for smooth muscle actin and h-caldesmon. Recurrence after excision is rare.^2,8

Neurofibroma is a common, mostly sporadic, benign tumor of nerve sheath origin. The solitary type may be localized (well circumscribed, unencapsulated) or diffuse. The presence of multiple, deep, and plexiform lesions is associated with neurofibromatosis type 1 (von Recklinghausen disease) that is caused by germline mutations in the NF1 gene. Histologically, the tumor is composed of Schwann cells, fibroblasts, perineurial cells, and nerve axons within an extracellular myxoid to collagenous matrix (Figure 4). The diffuse type is an ill-defined proliferation that entraps adnexal structures. The plexiform type is defined by multinodular serpentine fascicles. Immunohistochemically, the Schwann cells stain positive for S-100 protein and SOX10 (SRY-Box Transcription Factor 10). Epithelial membrane antigen stains admixed perineurial cells. Neurofilament protein highlights intratumoral axons, which generally are not found throughout schwannomas. Transformation to a malignant peripheral nerve sheath tumor occurs in up to 10% of patients with neurofibromatosis type 1, usually in plexiform neurofibromas, and is characterized by increased cellularity, atypia, mitotic activity, and necrosis.⁹

The Diagnosis: Schwannoma

Schwannoma, also known as neurilemmoma, is a benign encapsulated neoplasm of the peripheral nerve sheath that presents as a subcutaneous nodule.¹ It also may present in the retroperitoneum, mediastinum, and viscera (eg, gastrointestinal tract, bone, upper respiratory tract, lymph nodes). It may occur as multiple lesions when associated with certain syndromes. It usually is an asymptomatic indolent tumor with neurologic symptoms, such as pain and tenderness, in the lesions that are deeper, larger, or closer in proximity to nearby structures.^2,3

Histologically, a schwannoma is encapsulated by the perineurium of the nerve bundle from which it originates (quiz image [top]). The tumor consists of hypercellular (Antoni type A) and hypocellular (Antoni type B) areas. Antoni type A areas consist of tightly packed, spindleshaped cells with elongated wavy nuclei and indistinct cytoplasmic borders. These nuclei tend to align into parallel rows with intervening anuclear zones forming Verocay bodies (quiz image [bottom]).⁴ Verocay bodies are not seen in all schwannomas, and similar formations may be seen in other tumors as well. Solitary circumscribed neuromas also have Verocay bodies, whereas dermatofibromas and leiomyomas have Verocay-like bodies. Antoni type B areas have scattered spindled or ovoid cells in an edematous or myxoid matrix interspersed with inflammatory cells such as lymphocytes and histiocytes. Vessels with thick hyalinized walls are a helpful feature in diagnosis.² Schwann cells of a schwannoma stain diffusely positive with S-100 protein. The capsule stains positively with epithelial membrane antigen due to the presence of perineurial cells.²

The morphologic variants of this entity include conventional (common, solitary), cellular, plexiform, ancient, melanotic, epithelioid, pseudoglandular, neuroblastomalike, and microcystic/reticular schwannomas. There are additional variants that are associated with genetic syndromes, such as multiple cutaneous plexiform schwannomas linked with neurofibromatosis type 2, psammomatous melanotic schwannoma presenting in Carney complex, schwannomatosis, and segmental schwannomatosis (a distinct form of neurofibromatosis characterized by multiple schwannomas localized to one limb). Either presentation may have alteration or deletion of the neurofibromatosis type 2 gene, NF2, on chromosome 22.^2,5

Nodular fasciitis is a benign tumor of fibroblasts and myofibroblasts that usually arises in the subcutaneous tissues. It most commonly occurs in the upper extremities, trunk, head, and neck. It presents as a single, often painful, rapidly growing, subcutaneous nodule. Histologically, lesions mostly are well circumscribed yet unencapsulated, in contrast to schwannomas. They may be hypocellular or hypercellular and are composed of uniform spindle cells with a feathery or fascicular (tissue culture–like) appearance in a loose, myxoid to collagenous stroma. There may be foci of hemorrhage and conspicuous mitoses but not atypical figures (Figure 1). Immunohistochemically, the cells stain positively for smooth muscle actin and negatively for S-100 protein, which sets it apart from a schwannoma. Most cases contain fusion genes, with myosin heavy chain 9 ubiquitin-specific peptidase 6, MYH9-USP6, being the most common fusion product.⁶

Solitary circumscribed neuroma (palisaded encapsulated neuroma) is a benign, usually solitary dermal lesion. It most commonly occurs in middle-aged to elderly adults as a small (<1 cm), firm, flesh-colored to pink papule on the face (ie, cheeks, nose, nasolabial folds) and less commonly in the oral and acral regions and on the eyelids and penis. The lesion usually is unilobular; however, other growth patterns such as plexiform, multilobular, and fungating variants have been identified. Histologically, it is a well-circumscribed nodule with a thin capsule of perineurium that is composed of interlacing bundles of Schwann cells with a characteristic clefting artifact (Figure 2). Cells have wavy dark nuclei with scant cytoplasm that occasionally form palisades or Verocay bodies causing these lesions to be confused with schwannomas. Immunohistochemically, the Schwann cells stain positively with S-100 protein, and the perineurium stains positively with epithelial membrane antigen, Claudin-1, and Glut-1. Neurofilament protein stains axons throughout neuromas, whereas in schwannoma, the expression often is limited to entrapped axons at the periphery of the tumor.⁷

Angioleiomyoma is an uncommon, benign, smooth muscle neoplasm of the skin and subcutaneous tissue that originates from vascular smooth muscle. It most commonly presents in adult females aged 30 to 60 years, with a predilection for the lower limbs. These tumors typically are solitary, slow growing, and less than 2 cm in diameter and may be painful upon compression. Similar to schwannoma, angioleiomyoma is an encapsulated lesion composed of interlacing, uniform, smooth muscle bundles distributed around vessels (Figure 3). Smooth muscle cells have oval- or cigar-shaped nuclei with a small perinuclear vacuole of glycogen. Immunohistochemically, there is strong diffuse staining for smooth muscle actin and h-caldesmon. Recurrence after excision is rare.^2,8

Neurofibroma is a common, mostly sporadic, benign tumor of nerve sheath origin. The solitary type may be localized (well circumscribed, unencapsulated) or diffuse. The presence of multiple, deep, and plexiform lesions is associated with neurofibromatosis type 1 (von Recklinghausen disease) that is caused by germline mutations in the NF1 gene. Histologically, the tumor is composed of Schwann cells, fibroblasts, perineurial cells, and nerve axons within an extracellular myxoid to collagenous matrix (Figure 4). The diffuse type is an ill-defined proliferation that entraps adnexal structures. The plexiform type is defined by multinodular serpentine fascicles. Immunohistochemically, the Schwann cells stain positive for S-100 protein and SOX10 (SRY-Box Transcription Factor 10). Epithelial membrane antigen stains admixed perineurial cells. Neurofilament protein highlights intratumoral axons, which generally are not found throughout schwannomas. Transformation to a malignant peripheral nerve sheath tumor occurs in up to 10% of patients with neurofibromatosis type 1, usually in plexiform neurofibromas, and is characterized by increased cellularity, atypia, mitotic activity, and necrosis.⁹

The Diagnosis: Schwannoma

Schwannoma, also known as neurilemmoma, is a benign encapsulated neoplasm of the peripheral nerve sheath that presents as a subcutaneous nodule.¹ It also may present in the retroperitoneum, mediastinum, and viscera (eg, gastrointestinal tract, bone, upper respiratory tract, lymph nodes). It may occur as multiple lesions when associated with certain syndromes. It usually is an asymptomatic indolent tumor with neurologic symptoms, such as pain and tenderness, in the lesions that are deeper, larger, or closer in proximity to nearby structures.^2,3

Histologically, a schwannoma is encapsulated by the perineurium of the nerve bundle from which it originates (quiz image [top]). The tumor consists of hypercellular (Antoni type A) and hypocellular (Antoni type B) areas. Antoni type A areas consist of tightly packed, spindleshaped cells with elongated wavy nuclei and indistinct cytoplasmic borders. These nuclei tend to align into parallel rows with intervening anuclear zones forming Verocay bodies (quiz image [bottom]).⁴ Verocay bodies are not seen in all schwannomas, and similar formations may be seen in other tumors as well. Solitary circumscribed neuromas also have Verocay bodies, whereas dermatofibromas and leiomyomas have Verocay-like bodies. Antoni type B areas have scattered spindled or ovoid cells in an edematous or myxoid matrix interspersed with inflammatory cells such as lymphocytes and histiocytes. Vessels with thick hyalinized walls are a helpful feature in diagnosis.² Schwann cells of a schwannoma stain diffusely positive with S-100 protein. The capsule stains positively with epithelial membrane antigen due to the presence of perineurial cells.²

The morphologic variants of this entity include conventional (common, solitary), cellular, plexiform, ancient, melanotic, epithelioid, pseudoglandular, neuroblastomalike, and microcystic/reticular schwannomas. There are additional variants that are associated with genetic syndromes, such as multiple cutaneous plexiform schwannomas linked with neurofibromatosis type 2, psammomatous melanotic schwannoma presenting in Carney complex, schwannomatosis, and segmental schwannomatosis (a distinct form of neurofibromatosis characterized by multiple schwannomas localized to one limb). Either presentation may have alteration or deletion of the neurofibromatosis type 2 gene, NF2, on chromosome 22.^2,5

Nodular fasciitis is a benign tumor of fibroblasts and myofibroblasts that usually arises in the subcutaneous tissues. It most commonly occurs in the upper extremities, trunk, head, and neck. It presents as a single, often painful, rapidly growing, subcutaneous nodule. Histologically, lesions mostly are well circumscribed yet unencapsulated, in contrast to schwannomas. They may be hypocellular or hypercellular and are composed of uniform spindle cells with a feathery or fascicular (tissue culture–like) appearance in a loose, myxoid to collagenous stroma. There may be foci of hemorrhage and conspicuous mitoses but not atypical figures (Figure 1). Immunohistochemically, the cells stain positively for smooth muscle actin and negatively for S-100 protein, which sets it apart from a schwannoma. Most cases contain fusion genes, with myosin heavy chain 9 ubiquitin-specific peptidase 6, MYH9-USP6, being the most common fusion product.⁶

Solitary circumscribed neuroma (palisaded encapsulated neuroma) is a benign, usually solitary dermal lesion. It most commonly occurs in middle-aged to elderly adults as a small (<1 cm), firm, flesh-colored to pink papule on the face (ie, cheeks, nose, nasolabial folds) and less commonly in the oral and acral regions and on the eyelids and penis. The lesion usually is unilobular; however, other growth patterns such as plexiform, multilobular, and fungating variants have been identified. Histologically, it is a well-circumscribed nodule with a thin capsule of perineurium that is composed of interlacing bundles of Schwann cells with a characteristic clefting artifact (Figure 2). Cells have wavy dark nuclei with scant cytoplasm that occasionally form palisades or Verocay bodies causing these lesions to be confused with schwannomas. Immunohistochemically, the Schwann cells stain positively with S-100 protein, and the perineurium stains positively with epithelial membrane antigen, Claudin-1, and Glut-1. Neurofilament protein stains axons throughout neuromas, whereas in schwannoma, the expression often is limited to entrapped axons at the periphery of the tumor.⁷

Angioleiomyoma is an uncommon, benign, smooth muscle neoplasm of the skin and subcutaneous tissue that originates from vascular smooth muscle. It most commonly presents in adult females aged 30 to 60 years, with a predilection for the lower limbs. These tumors typically are solitary, slow growing, and less than 2 cm in diameter and may be painful upon compression. Similar to schwannoma, angioleiomyoma is an encapsulated lesion composed of interlacing, uniform, smooth muscle bundles distributed around vessels (Figure 3). Smooth muscle cells have oval- or cigar-shaped nuclei with a small perinuclear vacuole of glycogen. Immunohistochemically, there is strong diffuse staining for smooth muscle actin and h-caldesmon. Recurrence after excision is rare.^2,8

Neurofibroma is a common, mostly sporadic, benign tumor of nerve sheath origin. The solitary type may be localized (well circumscribed, unencapsulated) or diffuse. The presence of multiple, deep, and plexiform lesions is associated with neurofibromatosis type 1 (von Recklinghausen disease) that is caused by germline mutations in the NF1 gene. Histologically, the tumor is composed of Schwann cells, fibroblasts, perineurial cells, and nerve axons within an extracellular myxoid to collagenous matrix (Figure 4). The diffuse type is an ill-defined proliferation that entraps adnexal structures. The plexiform type is defined by multinodular serpentine fascicles. Immunohistochemically, the Schwann cells stain positive for S-100 protein and SOX10 (SRY-Box Transcription Factor 10). Epithelial membrane antigen stains admixed perineurial cells. Neurofilament protein highlights intratumoral axons, which generally are not found throughout schwannomas. Transformation to a malignant peripheral nerve sheath tumor occurs in up to 10% of patients with neurofibromatosis type 1, usually in plexiform neurofibromas, and is characterized by increased cellularity, atypia, mitotic activity, and necrosis.⁹