Rare Diseases

Elevated levels of high-density lipoprotein (HDL) and apolipoprotein A1 (apoA1) are associated with a reduced risk for amyotrophic lateral sclerosis (ALS), new research shows.

The study also linked a higher ratio of total cholesterol to HDL with an increased risk for ALS. These findings, investigators noted, point to potential future biomarkers in screening for ALS and perhaps an approach to reduce risk or delay onset of ALS in the longer term.

“They may help build a biochemical picture of what’s going on and who might be at risk of developing ALS in the near future, particularly in people with a genetic predisposition to ALS,” study investigator Alexander G. Thompson, DPhil, Medical Research Council clinician scientist, Nuffield Department of Clinical Neurosciences, University of Oxford, United Kingdom, said in an interview.

He emphasized that although the current observational study cannot show cause and effect, such a relationship may exist.

The study was published online September 13 in the Journal of Neurology, Neurosurgery and Psychiatry.
 

Registry data

ALS is a disorder of progressive degeneration of upper and lower motor neurons. Genetic variants account for fewer than 15% of cases. The factors that are associated with the greatest risk are unclear.

To investigate, the researchers used data from the UK Biobank, a prospective cohort study of persons aged 39-72 years. Participants underwent an initial assessment between March 2006 and October 2010 and were followed for a median of 11.9 years.

In addition to providing demographic and health information, participants provided blood samples for biochemical analysis. This included measurements of total cholesterol, HDL, low-density lipoprotein (LDL) cholesterol, triglycerides, apoA1, apolipoprotein B (apoB), A1c, and creatinine.

Researchers used diagnostic codes in inpatient health records and death certificate information to verify ALS diagnoses.

The analysis included data from 502,409 participants. The mean age of the participants was 58 years, and 54.4% were women. During follow-up, 343 participants were diagnosed with ALS, yielding a crude incidence of 5.85 per 100,000 per year (95% confidence interval, 5.25-6.51).

After controlling for sex and age, results showed that higher HDL (hazard ratio, 0.84; 95% CI, 0.73-0.96; P = .010) and higher apoA1 (HR, 0.83; 95% CI, 0.72-0.94, P = .005) were associated with a reduced risk for subsequent ALS.

A higher ratio of total cholesterol to HDL was associated with increased ALS risk.

A rise in neurofilaments and other markers of neuronal loss typically occur within about a year of ALS symptom onset. To ensure that they were capturing participants whose blood samples were taken before the onset of neurodegeneration, the researchers performed a secondary analysis that excluded ALS diagnoses within 5 years of the baseline study visit.

Results of the analysis were largely consistent with models incorporating all participants with regard to magnitude and direction of associations. In addition, the findings persisted in models that controlled for statin use, smoking, and vascular disease.
 

Mechanism unclear

To more closely examine lipid status prior to ALS diagnosis, the researchers performed a nested case-control analysis that involved matching each participant who developed ALS with 20 participants of similar age, sex, and time of enrollment who did not develop the disease.

Linear models showed that levels of LDL and apoB, which are closely correlated, decrease over time in those who developed ALS. This was not the case for HDL and apoA1. “This suggests LDL levels are going down, and we think it’s happening quite some time before symptoms start, even before neurodegeneration starts,” said Dr. Thompson.

How blood lipid levels correlate with ALS risk is unclear. Dr. Thompson noted that LDL is an oxidative stressor and can provoke inflammation, whereas HDL is an antioxidant that is involved in healing. However, given that LDL and HDL don’t cross into the brain in great amounts, “the lipid changes may be a reflection of something else going on that contributes to the risk of ALS,” he said.

More evidence of a causal relationship is needed before any clinical implications can be drawn, including the potential manipulation of lipid levels to prevent ALS, said Dr. Thompson. In addition, even were such a relationship to be established, altering lipid levels in a healthy individual who has no family history of ALS would be unlikely to alter risk.

Dr. Thompson added that among those with a genetic predisposition, lipid changes “may be a marker or clue that something’s going wrong in the nervous system and that ALS might be about to start. That would be the ideal time to treat people at risk of ALS with gene therapy.”
 

Metabolism gone awry

Commenting on the findings, Stephen Goutman, MD, director, Pranger ALS Clinic, associate professor of neurology, Neuromuscular Program, University of Michigan, Ann Arbor, called the study “very interesting.” Of particular note was a trend of decreasing LDL and apoB levels prior to an ALS diagnosis, said Dr. Goutman.

The results are in agreement with several studies that show an alteration in metabolism in individuals with ALS, he said. “These altered metabolic pathways may provide some signal that something has gone awry,” he commented.

He agreed that an “ultimate goal” is to identify factors or biomarkers that can be used to predict whether individuals will develop ALS and to enable intervention to decrease the risk.

This new research highlights the value of population-based registries and large prospective cohorts, said Dr. Goutman. “These help to better define the genetic, environmental, and metabolic factors that increase and predict ALS risk,” he said.

But more work is needed, said Dr. Goutman. He noted that in the study, only 192 participants were diagnosed with ALS more than 5 years after enrollment. “This means additional large cohort studies are needed, especially those that reflect the diversity of the population, for us to solve the mystery of ALS and to prevent it,” he said.

Dr. Thompson and Dr. Goutman have disclosed no relevant financial relationships.

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

Elevated levels of high-density lipoprotein (HDL) and apolipoprotein A1 (apoA1) are associated with a reduced risk for amyotrophic lateral sclerosis (ALS), new research shows.

The study also linked a higher ratio of total cholesterol to HDL with an increased risk for ALS. These findings, investigators noted, point to potential future biomarkers in screening for ALS and perhaps an approach to reduce risk or delay onset of ALS in the longer term.

“They may help build a biochemical picture of what’s going on and who might be at risk of developing ALS in the near future, particularly in people with a genetic predisposition to ALS,” study investigator Alexander G. Thompson, DPhil, Medical Research Council clinician scientist, Nuffield Department of Clinical Neurosciences, University of Oxford, United Kingdom, said in an interview.

He emphasized that although the current observational study cannot show cause and effect, such a relationship may exist.

The study was published online September 13 in the Journal of Neurology, Neurosurgery and Psychiatry.
 

Registry data

ALS is a disorder of progressive degeneration of upper and lower motor neurons. Genetic variants account for fewer than 15% of cases. The factors that are associated with the greatest risk are unclear.

To investigate, the researchers used data from the UK Biobank, a prospective cohort study of persons aged 39-72 years. Participants underwent an initial assessment between March 2006 and October 2010 and were followed for a median of 11.9 years.

In addition to providing demographic and health information, participants provided blood samples for biochemical analysis. This included measurements of total cholesterol, HDL, low-density lipoprotein (LDL) cholesterol, triglycerides, apoA1, apolipoprotein B (apoB), A1c, and creatinine.

Researchers used diagnostic codes in inpatient health records and death certificate information to verify ALS diagnoses.

The analysis included data from 502,409 participants. The mean age of the participants was 58 years, and 54.4% were women. During follow-up, 343 participants were diagnosed with ALS, yielding a crude incidence of 5.85 per 100,000 per year (95% confidence interval, 5.25-6.51).

After controlling for sex and age, results showed that higher HDL (hazard ratio, 0.84; 95% CI, 0.73-0.96; P = .010) and higher apoA1 (HR, 0.83; 95% CI, 0.72-0.94, P = .005) were associated with a reduced risk for subsequent ALS.

A higher ratio of total cholesterol to HDL was associated with increased ALS risk.

A rise in neurofilaments and other markers of neuronal loss typically occur within about a year of ALS symptom onset. To ensure that they were capturing participants whose blood samples were taken before the onset of neurodegeneration, the researchers performed a secondary analysis that excluded ALS diagnoses within 5 years of the baseline study visit.

Results of the analysis were largely consistent with models incorporating all participants with regard to magnitude and direction of associations. In addition, the findings persisted in models that controlled for statin use, smoking, and vascular disease.
 

Mechanism unclear

To more closely examine lipid status prior to ALS diagnosis, the researchers performed a nested case-control analysis that involved matching each participant who developed ALS with 20 participants of similar age, sex, and time of enrollment who did not develop the disease.

Linear models showed that levels of LDL and apoB, which are closely correlated, decrease over time in those who developed ALS. This was not the case for HDL and apoA1. “This suggests LDL levels are going down, and we think it’s happening quite some time before symptoms start, even before neurodegeneration starts,” said Dr. Thompson.

How blood lipid levels correlate with ALS risk is unclear. Dr. Thompson noted that LDL is an oxidative stressor and can provoke inflammation, whereas HDL is an antioxidant that is involved in healing. However, given that LDL and HDL don’t cross into the brain in great amounts, “the lipid changes may be a reflection of something else going on that contributes to the risk of ALS,” he said.

More evidence of a causal relationship is needed before any clinical implications can be drawn, including the potential manipulation of lipid levels to prevent ALS, said Dr. Thompson. In addition, even were such a relationship to be established, altering lipid levels in a healthy individual who has no family history of ALS would be unlikely to alter risk.

Dr. Thompson added that among those with a genetic predisposition, lipid changes “may be a marker or clue that something’s going wrong in the nervous system and that ALS might be about to start. That would be the ideal time to treat people at risk of ALS with gene therapy.”
 

Metabolism gone awry

Commenting on the findings, Stephen Goutman, MD, director, Pranger ALS Clinic, associate professor of neurology, Neuromuscular Program, University of Michigan, Ann Arbor, called the study “very interesting.” Of particular note was a trend of decreasing LDL and apoB levels prior to an ALS diagnosis, said Dr. Goutman.

The results are in agreement with several studies that show an alteration in metabolism in individuals with ALS, he said. “These altered metabolic pathways may provide some signal that something has gone awry,” he commented.

He agreed that an “ultimate goal” is to identify factors or biomarkers that can be used to predict whether individuals will develop ALS and to enable intervention to decrease the risk.

This new research highlights the value of population-based registries and large prospective cohorts, said Dr. Goutman. “These help to better define the genetic, environmental, and metabolic factors that increase and predict ALS risk,” he said.

But more work is needed, said Dr. Goutman. He noted that in the study, only 192 participants were diagnosed with ALS more than 5 years after enrollment. “This means additional large cohort studies are needed, especially those that reflect the diversity of the population, for us to solve the mystery of ALS and to prevent it,” he said.

Dr. Thompson and Dr. Goutman have disclosed no relevant financial relationships.

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

Elevated levels of high-density lipoprotein (HDL) and apolipoprotein A1 (apoA1) are associated with a reduced risk for amyotrophic lateral sclerosis (ALS), new research shows.

The study also linked a higher ratio of total cholesterol to HDL with an increased risk for ALS. These findings, investigators noted, point to potential future biomarkers in screening for ALS and perhaps an approach to reduce risk or delay onset of ALS in the longer term.

“They may help build a biochemical picture of what’s going on and who might be at risk of developing ALS in the near future, particularly in people with a genetic predisposition to ALS,” study investigator Alexander G. Thompson, DPhil, Medical Research Council clinician scientist, Nuffield Department of Clinical Neurosciences, University of Oxford, United Kingdom, said in an interview.

He emphasized that although the current observational study cannot show cause and effect, such a relationship may exist.

The study was published online September 13 in the Journal of Neurology, Neurosurgery and Psychiatry.
 

Registry data

ALS is a disorder of progressive degeneration of upper and lower motor neurons. Genetic variants account for fewer than 15% of cases. The factors that are associated with the greatest risk are unclear.

To investigate, the researchers used data from the UK Biobank, a prospective cohort study of persons aged 39-72 years. Participants underwent an initial assessment between March 2006 and October 2010 and were followed for a median of 11.9 years.

In addition to providing demographic and health information, participants provided blood samples for biochemical analysis. This included measurements of total cholesterol, HDL, low-density lipoprotein (LDL) cholesterol, triglycerides, apoA1, apolipoprotein B (apoB), A1c, and creatinine.

Researchers used diagnostic codes in inpatient health records and death certificate information to verify ALS diagnoses.

The analysis included data from 502,409 participants. The mean age of the participants was 58 years, and 54.4% were women. During follow-up, 343 participants were diagnosed with ALS, yielding a crude incidence of 5.85 per 100,000 per year (95% confidence interval, 5.25-6.51).

After controlling for sex and age, results showed that higher HDL (hazard ratio, 0.84; 95% CI, 0.73-0.96; P = .010) and higher apoA1 (HR, 0.83; 95% CI, 0.72-0.94, P = .005) were associated with a reduced risk for subsequent ALS.

A higher ratio of total cholesterol to HDL was associated with increased ALS risk.

A rise in neurofilaments and other markers of neuronal loss typically occur within about a year of ALS symptom onset. To ensure that they were capturing participants whose blood samples were taken before the onset of neurodegeneration, the researchers performed a secondary analysis that excluded ALS diagnoses within 5 years of the baseline study visit.

Results of the analysis were largely consistent with models incorporating all participants with regard to magnitude and direction of associations. In addition, the findings persisted in models that controlled for statin use, smoking, and vascular disease.
 

Mechanism unclear

To more closely examine lipid status prior to ALS diagnosis, the researchers performed a nested case-control analysis that involved matching each participant who developed ALS with 20 participants of similar age, sex, and time of enrollment who did not develop the disease.

Linear models showed that levels of LDL and apoB, which are closely correlated, decrease over time in those who developed ALS. This was not the case for HDL and apoA1. “This suggests LDL levels are going down, and we think it’s happening quite some time before symptoms start, even before neurodegeneration starts,” said Dr. Thompson.

How blood lipid levels correlate with ALS risk is unclear. Dr. Thompson noted that LDL is an oxidative stressor and can provoke inflammation, whereas HDL is an antioxidant that is involved in healing. However, given that LDL and HDL don’t cross into the brain in great amounts, “the lipid changes may be a reflection of something else going on that contributes to the risk of ALS,” he said.

More evidence of a causal relationship is needed before any clinical implications can be drawn, including the potential manipulation of lipid levels to prevent ALS, said Dr. Thompson. In addition, even were such a relationship to be established, altering lipid levels in a healthy individual who has no family history of ALS would be unlikely to alter risk.

Dr. Thompson added that among those with a genetic predisposition, lipid changes “may be a marker or clue that something’s going wrong in the nervous system and that ALS might be about to start. That would be the ideal time to treat people at risk of ALS with gene therapy.”
 

Metabolism gone awry

Commenting on the findings, Stephen Goutman, MD, director, Pranger ALS Clinic, associate professor of neurology, Neuromuscular Program, University of Michigan, Ann Arbor, called the study “very interesting.” Of particular note was a trend of decreasing LDL and apoB levels prior to an ALS diagnosis, said Dr. Goutman.

The results are in agreement with several studies that show an alteration in metabolism in individuals with ALS, he said. “These altered metabolic pathways may provide some signal that something has gone awry,” he commented.

He agreed that an “ultimate goal” is to identify factors or biomarkers that can be used to predict whether individuals will develop ALS and to enable intervention to decrease the risk.

This new research highlights the value of population-based registries and large prospective cohorts, said Dr. Goutman. “These help to better define the genetic, environmental, and metabolic factors that increase and predict ALS risk,” he said.

But more work is needed, said Dr. Goutman. He noted that in the study, only 192 participants were diagnosed with ALS more than 5 years after enrollment. “This means additional large cohort studies are needed, especially those that reflect the diversity of the population, for us to solve the mystery of ALS and to prevent it,” he said.

Dr. Thompson and Dr. Goutman have disclosed no relevant financial relationships.

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

With more than 300 genetic skin disorders involving more than 1,000 genes and hundreds of genetic tests available on the market, it can be daunting for health care providers and families of pediatric patients to navigate the landscape.

“Testing options range from targeted variant testing and single-gene testing to exome and genome sequencing,” Gabriele Richard, MD, said at the annual meeting of the Society for Pediatric Dermatology. “It is not always easy to determine which testing is right.”

Increasingly, clinical genomic tests, including exome and genome sequencing, are used for patients with complex phenotypes, and possibly multiple disorders, who might have no diagnosis despite extensive prior testing, said Dr. Richard, medical director at Gaithersburg, Md.–based GeneDx., a molecular diagnostic laboratory that performs comprehensive testing for rare genetic disorders. These tests are also being used more for first-line testing in critically ill patients in the neonatal and pediatric intensive care units, and “have heralded a whole new era of gene and disease discovery,” she added.

Targeted variant testing is used for known familial variants, to test family members for carrier status and segregation, and to make a prenatal diagnosis, she said. Single-gene testing is available for most genes and has its place for conditions that can be clinically well-recognized, such as ichthyosis vulgaris, Darier disease, or Papillon-Lefèvre syndrome.

Specific tests for identifying gene deletions or duplications are exon-level microarrays, multiplex ligation-dependent probe amplification (MLPA), and chromosomal microarray analysis. “The latter has been successful in identifying diseases causing chromosomal abnormalities in over 10% of cases overall,” Dr. Richard said. An example of a skin disorder is X-linked ichthyosis caused by a deletion of the steroid sulfatase locus in more than 95% of affected males, she said.

“However, the current staple of molecular diagnostic testing is multigene next-generation sequencing (NGS) panels, which allow you to interrogate two to hundreds of genes concurrently, including sequencing and deletion duplication testing.” These tests are the most cost effective, she said, and are available for almost any genodermatosis or group of disorders with overlapping phenotypes, such as albinism or ichthyosis, epidermolysis bullosa and skin fragility, ectodermal dysplasia, or porphyria. According to Dr. Richard, the diagnostic outcomes of NGS panels mainly depend on test indication, panel size and gene curation, age of onset, and prevailing inheritance pattern of disorders.

Her recommended criteria for distinguishing the myriad of available NGS panels include checking gene content, technical sensitivity of sequencing and deletion/duplication analysis, quality of variant interpretation and reporting, turn-around time, and available familial follow-up testing. “If a family might consider future prenatal diagnosis, choose the lab that performs prenatal and diagnostic testing,” Dr. Richard said. “Equally important are client services such as ease of ordering, insurance coverage, and the ability to determine out-of-pocket cost to patients.”

Resources that enable consumers to compare panel content, methodology, turnaround time, and other parameters include the Genetic Testing Registry (GTR) operated by the National Center for Biotechnology Information, and Concert Genetics, a genetic testing company. The National Society of Genetic Counselors also offers a searchable database for finding a genetic counselor.

Exome sequencing includes the coding sequences of about 20,000 genes and has an average depth of 50 to about 150 reads. “It is a phenotype-driven test where only select variants are being reported fitting the phenotype,” Dr. Richard said. “The outcome of exome and genome sequencing much depends on optimization of bioinformatic pipelines and tools.” Besides small sequence variants, exome sequencing is able to identify a variety of different types of disease-causing variants, such as gene copy number variants seen in about 6% of positive cases, mosaicism, regions of homozygosity, uniparental disomy, and other unusual events and is cost effective.

Whole-genome sequencing, meanwhile, includes the entire genome, particularly noncoding regions, and has an average depth of more than 30 reads. “It’s based on single-molecule sequencing, has longer reads and more uniform coverage, compared to exome sequencing,” she said. “Higher cost, variant interpretation, and lack of coverage by payers are still presenting challenges for genome sequencing.” Genome sequencing can be done in a day or less.

According to diagnostic outcomes based on 280,000 individuals including 125,000 probands from GeneDx data, a definitive diagnosis was made in 26% of probands, of which 2.8% had more than one diagnostic finding and 1.8% had actionable secondary findings. In addition, 7% of the variants were found in candidate genes; 31% of probands had variants of uncertain significance, while 36% tested negative. “Nevertheless, the diagnostic yield of exome sequencing depends on the phenotype and cohort studied,” Dr. Richard continued.

At her company, she said, the highest positive rate is for multiple congenital anomalies (34%), skeletal system abnormalities (30%), and nervous system abnormalities (29%). Trio testing – the concurrent analysis of both biological parents and proband for all genes – “is a critical factor for success,” she added. “It not only improves the variant calling because we have three times the data and increases test sensitivity, it also provides more certain results, determines inheritance and allows for detection of parental mosaicism.”

According to Dr. Richard, trio testing has a one-third higher diagnostic rate than sequencing of the proband alone. Citing a published prospective study that compiled data from eight different exome- and genome-sequencing studies in critically ill neonates and children, trio testing made it possible to make a genetic diagnosis in up to 58% of children.

Whole-genome sequencing is estimated to have a 5%-10% higher diagnostic rate than exome sequencing. “However, we are still a ways away from using it as a routine diagnostic test for all test indications,” Dr. Richard said. “Automation, special bioinformatics algorithms and databases, and combination of genome sequencing with mRNA sequencing are being explored and built to further improve the diagnostic yield.”

Dr. Richard had no disclosures other than being an employee of GeneDx.

[email protected]

With more than 300 genetic skin disorders involving more than 1,000 genes and hundreds of genetic tests available on the market, it can be daunting for health care providers and families of pediatric patients to navigate the landscape.

“Testing options range from targeted variant testing and single-gene testing to exome and genome sequencing,” Gabriele Richard, MD, said at the annual meeting of the Society for Pediatric Dermatology. “It is not always easy to determine which testing is right.”

Increasingly, clinical genomic tests, including exome and genome sequencing, are used for patients with complex phenotypes, and possibly multiple disorders, who might have no diagnosis despite extensive prior testing, said Dr. Richard, medical director at Gaithersburg, Md.–based GeneDx., a molecular diagnostic laboratory that performs comprehensive testing for rare genetic disorders. These tests are also being used more for first-line testing in critically ill patients in the neonatal and pediatric intensive care units, and “have heralded a whole new era of gene and disease discovery,” she added.

Targeted variant testing is used for known familial variants, to test family members for carrier status and segregation, and to make a prenatal diagnosis, she said. Single-gene testing is available for most genes and has its place for conditions that can be clinically well-recognized, such as ichthyosis vulgaris, Darier disease, or Papillon-Lefèvre syndrome.

Specific tests for identifying gene deletions or duplications are exon-level microarrays, multiplex ligation-dependent probe amplification (MLPA), and chromosomal microarray analysis. “The latter has been successful in identifying diseases causing chromosomal abnormalities in over 10% of cases overall,” Dr. Richard said. An example of a skin disorder is X-linked ichthyosis caused by a deletion of the steroid sulfatase locus in more than 95% of affected males, she said.

“However, the current staple of molecular diagnostic testing is multigene next-generation sequencing (NGS) panels, which allow you to interrogate two to hundreds of genes concurrently, including sequencing and deletion duplication testing.” These tests are the most cost effective, she said, and are available for almost any genodermatosis or group of disorders with overlapping phenotypes, such as albinism or ichthyosis, epidermolysis bullosa and skin fragility, ectodermal dysplasia, or porphyria. According to Dr. Richard, the diagnostic outcomes of NGS panels mainly depend on test indication, panel size and gene curation, age of onset, and prevailing inheritance pattern of disorders.

Her recommended criteria for distinguishing the myriad of available NGS panels include checking gene content, technical sensitivity of sequencing and deletion/duplication analysis, quality of variant interpretation and reporting, turn-around time, and available familial follow-up testing. “If a family might consider future prenatal diagnosis, choose the lab that performs prenatal and diagnostic testing,” Dr. Richard said. “Equally important are client services such as ease of ordering, insurance coverage, and the ability to determine out-of-pocket cost to patients.”

Resources that enable consumers to compare panel content, methodology, turnaround time, and other parameters include the Genetic Testing Registry (GTR) operated by the National Center for Biotechnology Information, and Concert Genetics, a genetic testing company. The National Society of Genetic Counselors also offers a searchable database for finding a genetic counselor.

Exome sequencing includes the coding sequences of about 20,000 genes and has an average depth of 50 to about 150 reads. “It is a phenotype-driven test where only select variants are being reported fitting the phenotype,” Dr. Richard said. “The outcome of exome and genome sequencing much depends on optimization of bioinformatic pipelines and tools.” Besides small sequence variants, exome sequencing is able to identify a variety of different types of disease-causing variants, such as gene copy number variants seen in about 6% of positive cases, mosaicism, regions of homozygosity, uniparental disomy, and other unusual events and is cost effective.

Whole-genome sequencing, meanwhile, includes the entire genome, particularly noncoding regions, and has an average depth of more than 30 reads. “It’s based on single-molecule sequencing, has longer reads and more uniform coverage, compared to exome sequencing,” she said. “Higher cost, variant interpretation, and lack of coverage by payers are still presenting challenges for genome sequencing.” Genome sequencing can be done in a day or less.

According to diagnostic outcomes based on 280,000 individuals including 125,000 probands from GeneDx data, a definitive diagnosis was made in 26% of probands, of which 2.8% had more than one diagnostic finding and 1.8% had actionable secondary findings. In addition, 7% of the variants were found in candidate genes; 31% of probands had variants of uncertain significance, while 36% tested negative. “Nevertheless, the diagnostic yield of exome sequencing depends on the phenotype and cohort studied,” Dr. Richard continued.

At her company, she said, the highest positive rate is for multiple congenital anomalies (34%), skeletal system abnormalities (30%), and nervous system abnormalities (29%). Trio testing – the concurrent analysis of both biological parents and proband for all genes – “is a critical factor for success,” she added. “It not only improves the variant calling because we have three times the data and increases test sensitivity, it also provides more certain results, determines inheritance and allows for detection of parental mosaicism.”

According to Dr. Richard, trio testing has a one-third higher diagnostic rate than sequencing of the proband alone. Citing a published prospective study that compiled data from eight different exome- and genome-sequencing studies in critically ill neonates and children, trio testing made it possible to make a genetic diagnosis in up to 58% of children.

Whole-genome sequencing is estimated to have a 5%-10% higher diagnostic rate than exome sequencing. “However, we are still a ways away from using it as a routine diagnostic test for all test indications,” Dr. Richard said. “Automation, special bioinformatics algorithms and databases, and combination of genome sequencing with mRNA sequencing are being explored and built to further improve the diagnostic yield.”

Dr. Richard had no disclosures other than being an employee of GeneDx.

[email protected]

With more than 300 genetic skin disorders involving more than 1,000 genes and hundreds of genetic tests available on the market, it can be daunting for health care providers and families of pediatric patients to navigate the landscape.

“Testing options range from targeted variant testing and single-gene testing to exome and genome sequencing,” Gabriele Richard, MD, said at the annual meeting of the Society for Pediatric Dermatology. “It is not always easy to determine which testing is right.”

Increasingly, clinical genomic tests, including exome and genome sequencing, are used for patients with complex phenotypes, and possibly multiple disorders, who might have no diagnosis despite extensive prior testing, said Dr. Richard, medical director at Gaithersburg, Md.–based GeneDx., a molecular diagnostic laboratory that performs comprehensive testing for rare genetic disorders. These tests are also being used more for first-line testing in critically ill patients in the neonatal and pediatric intensive care units, and “have heralded a whole new era of gene and disease discovery,” she added.

Targeted variant testing is used for known familial variants, to test family members for carrier status and segregation, and to make a prenatal diagnosis, she said. Single-gene testing is available for most genes and has its place for conditions that can be clinically well-recognized, such as ichthyosis vulgaris, Darier disease, or Papillon-Lefèvre syndrome.

Specific tests for identifying gene deletions or duplications are exon-level microarrays, multiplex ligation-dependent probe amplification (MLPA), and chromosomal microarray analysis. “The latter has been successful in identifying diseases causing chromosomal abnormalities in over 10% of cases overall,” Dr. Richard said. An example of a skin disorder is X-linked ichthyosis caused by a deletion of the steroid sulfatase locus in more than 95% of affected males, she said.

“However, the current staple of molecular diagnostic testing is multigene next-generation sequencing (NGS) panels, which allow you to interrogate two to hundreds of genes concurrently, including sequencing and deletion duplication testing.” These tests are the most cost effective, she said, and are available for almost any genodermatosis or group of disorders with overlapping phenotypes, such as albinism or ichthyosis, epidermolysis bullosa and skin fragility, ectodermal dysplasia, or porphyria. According to Dr. Richard, the diagnostic outcomes of NGS panels mainly depend on test indication, panel size and gene curation, age of onset, and prevailing inheritance pattern of disorders.

Her recommended criteria for distinguishing the myriad of available NGS panels include checking gene content, technical sensitivity of sequencing and deletion/duplication analysis, quality of variant interpretation and reporting, turn-around time, and available familial follow-up testing. “If a family might consider future prenatal diagnosis, choose the lab that performs prenatal and diagnostic testing,” Dr. Richard said. “Equally important are client services such as ease of ordering, insurance coverage, and the ability to determine out-of-pocket cost to patients.”

Resources that enable consumers to compare panel content, methodology, turnaround time, and other parameters include the Genetic Testing Registry (GTR) operated by the National Center for Biotechnology Information, and Concert Genetics, a genetic testing company. The National Society of Genetic Counselors also offers a searchable database for finding a genetic counselor.

Exome sequencing includes the coding sequences of about 20,000 genes and has an average depth of 50 to about 150 reads. “It is a phenotype-driven test where only select variants are being reported fitting the phenotype,” Dr. Richard said. “The outcome of exome and genome sequencing much depends on optimization of bioinformatic pipelines and tools.” Besides small sequence variants, exome sequencing is able to identify a variety of different types of disease-causing variants, such as gene copy number variants seen in about 6% of positive cases, mosaicism, regions of homozygosity, uniparental disomy, and other unusual events and is cost effective.

Whole-genome sequencing, meanwhile, includes the entire genome, particularly noncoding regions, and has an average depth of more than 30 reads. “It’s based on single-molecule sequencing, has longer reads and more uniform coverage, compared to exome sequencing,” she said. “Higher cost, variant interpretation, and lack of coverage by payers are still presenting challenges for genome sequencing.” Genome sequencing can be done in a day or less.

According to diagnostic outcomes based on 280,000 individuals including 125,000 probands from GeneDx data, a definitive diagnosis was made in 26% of probands, of which 2.8% had more than one diagnostic finding and 1.8% had actionable secondary findings. In addition, 7% of the variants were found in candidate genes; 31% of probands had variants of uncertain significance, while 36% tested negative. “Nevertheless, the diagnostic yield of exome sequencing depends on the phenotype and cohort studied,” Dr. Richard continued.

At her company, she said, the highest positive rate is for multiple congenital anomalies (34%), skeletal system abnormalities (30%), and nervous system abnormalities (29%). Trio testing – the concurrent analysis of both biological parents and proband for all genes – “is a critical factor for success,” she added. “It not only improves the variant calling because we have three times the data and increases test sensitivity, it also provides more certain results, determines inheritance and allows for detection of parental mosaicism.”

According to Dr. Richard, trio testing has a one-third higher diagnostic rate than sequencing of the proband alone. Citing a published prospective study that compiled data from eight different exome- and genome-sequencing studies in critically ill neonates and children, trio testing made it possible to make a genetic diagnosis in up to 58% of children.

Whole-genome sequencing is estimated to have a 5%-10% higher diagnostic rate than exome sequencing. “However, we are still a ways away from using it as a routine diagnostic test for all test indications,” Dr. Richard said. “Automation, special bioinformatics algorithms and databases, and combination of genome sequencing with mRNA sequencing are being explored and built to further improve the diagnostic yield.”

Dr. Richard had no disclosures other than being an employee of GeneDx.

[email protected]

When Denise M. Adams, MD, began her career as a pediatric oncologist 25 years ago, there were many interventions for vascular anomalies, but most were surgery based and medical options were limited.

“The medicines we had were believed to be antiangiogenic and they were used not only for tumors but for all sorts of malformations,” Dr. Adams, a pediatric hematologist-oncologist at Children’s Hospital of Philadelphia, recalled during the annual meeting of the Society for Pediatric Dermatology. “I didn’t understand how so many different phenotypes could respond to the same medicine. Not all of them did, but some did have some response.”

She also grew frustrated by the lack of clinical trials and collaborative research groups involving patients with vascular anomalies. “I called this the chicken soup of medical management,” she said. “As we got more involved in vascular anomalies, the power of one patient or that power of a few patients led us in a direction for improved medical management. Or knowledge was gained by one patient who failed all noted medical management and led us into a direction repurposing a drug that actually wound up working.”

Propranolol, for example, became a key medicine for the treatment of vascular anomalies when it was found to improve hemangiomas in children who were given the drug for other reasons. “From this observation a key prospective study was performed and this beta-blocker became FDA approved for the treatment of complicated hemangiomas,” said Dr. Adams, who directs the hospital’s Comprehensive Vascular Anomalies Program. “That was how a bedside observation let to bench intervention, and how presently we are investigating bench interventions related to the mechanism of propranolol therapy.”

Then there is the story of the mammalian target of rapamycin (mTOR) inhibitor sirolimus. In her previous role as medical director of the Hemangioma and Vascular Malformation Center at Cincinnati Children’s Hospital, Dr. Adams and colleagues cared for an infant who presented with a Kaposiform hemangioendothelioma (KHE). “At that time, she was given our standard of practice for the treatment, but our standard of practice was not good enough,” she said.

While other options were being discussed for this patient, “we had been doing some collaborative work with pathology and nephrology on the PIKC3A pathway, because we knew that germline mutations of TEK were involved in this pathway, and we knew that 50% of patients with PTEN mutations had vascular anomalies. So, we hypothesized that this pathway was involved in vascular anomalies.”

They also had earlier success using mTOR inhibition for tuberous sclerosis patients with angiomyolipomas and patients with neurofibromatosis. “We needed a medicine that could be given orally because we did not think this patient was going to do well, so we started her on sirolimus,” Dr. Adams said. “She had a great response. This was followed by a phase 2 study, which proved efficacy and led to discovery of biomarkers.” This is where the angiopoietin-2 story started, she said, noting that this biomarker is now used “to differentiate KLA [Kaposiform lymphangiomatosis] from KHE and KLAs and KHE from other disorders.”

This bedside work helped researchers to better understand the mechanism of action in other disorders, such as observing somatic mutations in PIK3CA in patients with CLOVES syndrome. “This meant that we could now correlate the phenotype to the genotype, and it opened up targeted therapy with developmental therapeutics that were already in use for oncology,” Dr. Adams said. “We know we had mTOR inhibition with sirolimus and everolimus. We now have an AKT inhibitor, a PIK3CA inhibitor, and we now have another side of the pathway which deals with RASopathies, and some other medicines that we can use.”

Miransertib, a potent PAN-AKT inhibitor initially used for breast cancer, is currently being evaluated in open-label, phase 1 and 2 trials in patients with PIK3CA-related overgrowth spectrum (PROS) and Proteus syndrome. The dose used in a pilot study is about one-sixth of the dose used for oncology patients, Dr. Adams said.

She and her colleagues used miransertib to treat a 3-year-old with CLOVES syndrome who had lipomatous infiltration of the abdomen and retroperitoneum with failure to thrive. “He was not eating and was G-tube dependent,” she recalled. “After a month of therapy, he started eating and had improvement in his quality of life,” although despite this improvement volumetric MRI remained unchanged.

Advances in bench to bedside approaches are also under way. Hakon Hakonarson, MD, PhD, the founding director of the Center for Applied Genomics at CHOP, has discovered several genes with in vitro testing and zebra fish modeling, which has been followed by testing medicines on patients.

One such patient, according to Dr. Adams, had a severe central conducting lymphatic anomaly, with a pericardial effusion and significant dysfunction of the central conducting system. The patient was found to have an ARAF mutation, which induces ERK activation. “ERK is downstream of MEK, so the question was whether a MEK inhibitor, trametinib, could be used to treat this patient,” she said. “Trametinib was first used in tissue culture, then used in a zebra fish model and it showed some positive results. Then it was taken to the patient, who had improvement of pulmonary function, remodeling of the lymphatic system, and decrease in the size of his legs.”

Other antiangiogenic agents being used for the treatment of vascular anomalies include bevacizumab, which is being used in hereditary hemorrhagic telangiectasia, and thalidomide for HHT and arteriovenous malformations. For more information, Dr. Adams recommended a comprehensive review of vascular anomalies, related genes, and treatments that was published in Circulation Research.

The goal of future drug therapies is to support normal growth, “so we don’t need a maximum tolerated dose,” Dr. Adams said. “We need to be very careful of short-term and long-term side effects.”

Going forward, she said that she would like to see more natural history studies of vascular anomalies, improved outcome measures for clinical trials, adaptive study design, preclinical testing, animal model studies, universal availability of genomic testing, improvement of NIH funding, research collaboration nationally and internationally, and industry support.

Dr. Adams disclosed that she is a consultant to Venthera and Novartis.

[email protected]

When Denise M. Adams, MD, began her career as a pediatric oncologist 25 years ago, there were many interventions for vascular anomalies, but most were surgery based and medical options were limited.

“The medicines we had were believed to be antiangiogenic and they were used not only for tumors but for all sorts of malformations,” Dr. Adams, a pediatric hematologist-oncologist at Children’s Hospital of Philadelphia, recalled during the annual meeting of the Society for Pediatric Dermatology. “I didn’t understand how so many different phenotypes could respond to the same medicine. Not all of them did, but some did have some response.”

She also grew frustrated by the lack of clinical trials and collaborative research groups involving patients with vascular anomalies. “I called this the chicken soup of medical management,” she said. “As we got more involved in vascular anomalies, the power of one patient or that power of a few patients led us in a direction for improved medical management. Or knowledge was gained by one patient who failed all noted medical management and led us into a direction repurposing a drug that actually wound up working.”

Propranolol, for example, became a key medicine for the treatment of vascular anomalies when it was found to improve hemangiomas in children who were given the drug for other reasons. “From this observation a key prospective study was performed and this beta-blocker became FDA approved for the treatment of complicated hemangiomas,” said Dr. Adams, who directs the hospital’s Comprehensive Vascular Anomalies Program. “That was how a bedside observation let to bench intervention, and how presently we are investigating bench interventions related to the mechanism of propranolol therapy.”

Then there is the story of the mammalian target of rapamycin (mTOR) inhibitor sirolimus. In her previous role as medical director of the Hemangioma and Vascular Malformation Center at Cincinnati Children’s Hospital, Dr. Adams and colleagues cared for an infant who presented with a Kaposiform hemangioendothelioma (KHE). “At that time, she was given our standard of practice for the treatment, but our standard of practice was not good enough,” she said.

While other options were being discussed for this patient, “we had been doing some collaborative work with pathology and nephrology on the PIKC3A pathway, because we knew that germline mutations of TEK were involved in this pathway, and we knew that 50% of patients with PTEN mutations had vascular anomalies. So, we hypothesized that this pathway was involved in vascular anomalies.”

They also had earlier success using mTOR inhibition for tuberous sclerosis patients with angiomyolipomas and patients with neurofibromatosis. “We needed a medicine that could be given orally because we did not think this patient was going to do well, so we started her on sirolimus,” Dr. Adams said. “She had a great response. This was followed by a phase 2 study, which proved efficacy and led to discovery of biomarkers.” This is where the angiopoietin-2 story started, she said, noting that this biomarker is now used “to differentiate KLA [Kaposiform lymphangiomatosis] from KHE and KLAs and KHE from other disorders.”

This bedside work helped researchers to better understand the mechanism of action in other disorders, such as observing somatic mutations in PIK3CA in patients with CLOVES syndrome. “This meant that we could now correlate the phenotype to the genotype, and it opened up targeted therapy with developmental therapeutics that were already in use for oncology,” Dr. Adams said. “We know we had mTOR inhibition with sirolimus and everolimus. We now have an AKT inhibitor, a PIK3CA inhibitor, and we now have another side of the pathway which deals with RASopathies, and some other medicines that we can use.”

Miransertib, a potent PAN-AKT inhibitor initially used for breast cancer, is currently being evaluated in open-label, phase 1 and 2 trials in patients with PIK3CA-related overgrowth spectrum (PROS) and Proteus syndrome. The dose used in a pilot study is about one-sixth of the dose used for oncology patients, Dr. Adams said.

She and her colleagues used miransertib to treat a 3-year-old with CLOVES syndrome who had lipomatous infiltration of the abdomen and retroperitoneum with failure to thrive. “He was not eating and was G-tube dependent,” she recalled. “After a month of therapy, he started eating and had improvement in his quality of life,” although despite this improvement volumetric MRI remained unchanged.

Advances in bench to bedside approaches are also under way. Hakon Hakonarson, MD, PhD, the founding director of the Center for Applied Genomics at CHOP, has discovered several genes with in vitro testing and zebra fish modeling, which has been followed by testing medicines on patients.

One such patient, according to Dr. Adams, had a severe central conducting lymphatic anomaly, with a pericardial effusion and significant dysfunction of the central conducting system. The patient was found to have an ARAF mutation, which induces ERK activation. “ERK is downstream of MEK, so the question was whether a MEK inhibitor, trametinib, could be used to treat this patient,” she said. “Trametinib was first used in tissue culture, then used in a zebra fish model and it showed some positive results. Then it was taken to the patient, who had improvement of pulmonary function, remodeling of the lymphatic system, and decrease in the size of his legs.”

Other antiangiogenic agents being used for the treatment of vascular anomalies include bevacizumab, which is being used in hereditary hemorrhagic telangiectasia, and thalidomide for HHT and arteriovenous malformations. For more information, Dr. Adams recommended a comprehensive review of vascular anomalies, related genes, and treatments that was published in Circulation Research.

The goal of future drug therapies is to support normal growth, “so we don’t need a maximum tolerated dose,” Dr. Adams said. “We need to be very careful of short-term and long-term side effects.”

Going forward, she said that she would like to see more natural history studies of vascular anomalies, improved outcome measures for clinical trials, adaptive study design, preclinical testing, animal model studies, universal availability of genomic testing, improvement of NIH funding, research collaboration nationally and internationally, and industry support.

Dr. Adams disclosed that she is a consultant to Venthera and Novartis.

[email protected]

When Denise M. Adams, MD, began her career as a pediatric oncologist 25 years ago, there were many interventions for vascular anomalies, but most were surgery based and medical options were limited.

“The medicines we had were believed to be antiangiogenic and they were used not only for tumors but for all sorts of malformations,” Dr. Adams, a pediatric hematologist-oncologist at Children’s Hospital of Philadelphia, recalled during the annual meeting of the Society for Pediatric Dermatology. “I didn’t understand how so many different phenotypes could respond to the same medicine. Not all of them did, but some did have some response.”

She also grew frustrated by the lack of clinical trials and collaborative research groups involving patients with vascular anomalies. “I called this the chicken soup of medical management,” she said. “As we got more involved in vascular anomalies, the power of one patient or that power of a few patients led us in a direction for improved medical management. Or knowledge was gained by one patient who failed all noted medical management and led us into a direction repurposing a drug that actually wound up working.”

Propranolol, for example, became a key medicine for the treatment of vascular anomalies when it was found to improve hemangiomas in children who were given the drug for other reasons. “From this observation a key prospective study was performed and this beta-blocker became FDA approved for the treatment of complicated hemangiomas,” said Dr. Adams, who directs the hospital’s Comprehensive Vascular Anomalies Program. “That was how a bedside observation let to bench intervention, and how presently we are investigating bench interventions related to the mechanism of propranolol therapy.”

Then there is the story of the mammalian target of rapamycin (mTOR) inhibitor sirolimus. In her previous role as medical director of the Hemangioma and Vascular Malformation Center at Cincinnati Children’s Hospital, Dr. Adams and colleagues cared for an infant who presented with a Kaposiform hemangioendothelioma (KHE). “At that time, she was given our standard of practice for the treatment, but our standard of practice was not good enough,” she said.

While other options were being discussed for this patient, “we had been doing some collaborative work with pathology and nephrology on the PIKC3A pathway, because we knew that germline mutations of TEK were involved in this pathway, and we knew that 50% of patients with PTEN mutations had vascular anomalies. So, we hypothesized that this pathway was involved in vascular anomalies.”

They also had earlier success using mTOR inhibition for tuberous sclerosis patients with angiomyolipomas and patients with neurofibromatosis. “We needed a medicine that could be given orally because we did not think this patient was going to do well, so we started her on sirolimus,” Dr. Adams said. “She had a great response. This was followed by a phase 2 study, which proved efficacy and led to discovery of biomarkers.” This is where the angiopoietin-2 story started, she said, noting that this biomarker is now used “to differentiate KLA [Kaposiform lymphangiomatosis] from KHE and KLAs and KHE from other disorders.”

This bedside work helped researchers to better understand the mechanism of action in other disorders, such as observing somatic mutations in PIK3CA in patients with CLOVES syndrome. “This meant that we could now correlate the phenotype to the genotype, and it opened up targeted therapy with developmental therapeutics that were already in use for oncology,” Dr. Adams said. “We know we had mTOR inhibition with sirolimus and everolimus. We now have an AKT inhibitor, a PIK3CA inhibitor, and we now have another side of the pathway which deals with RASopathies, and some other medicines that we can use.”

Miransertib, a potent PAN-AKT inhibitor initially used for breast cancer, is currently being evaluated in open-label, phase 1 and 2 trials in patients with PIK3CA-related overgrowth spectrum (PROS) and Proteus syndrome. The dose used in a pilot study is about one-sixth of the dose used for oncology patients, Dr. Adams said.

She and her colleagues used miransertib to treat a 3-year-old with CLOVES syndrome who had lipomatous infiltration of the abdomen and retroperitoneum with failure to thrive. “He was not eating and was G-tube dependent,” she recalled. “After a month of therapy, he started eating and had improvement in his quality of life,” although despite this improvement volumetric MRI remained unchanged.

Advances in bench to bedside approaches are also under way. Hakon Hakonarson, MD, PhD, the founding director of the Center for Applied Genomics at CHOP, has discovered several genes with in vitro testing and zebra fish modeling, which has been followed by testing medicines on patients.

One such patient, according to Dr. Adams, had a severe central conducting lymphatic anomaly, with a pericardial effusion and significant dysfunction of the central conducting system. The patient was found to have an ARAF mutation, which induces ERK activation. “ERK is downstream of MEK, so the question was whether a MEK inhibitor, trametinib, could be used to treat this patient,” she said. “Trametinib was first used in tissue culture, then used in a zebra fish model and it showed some positive results. Then it was taken to the patient, who had improvement of pulmonary function, remodeling of the lymphatic system, and decrease in the size of his legs.”

Other antiangiogenic agents being used for the treatment of vascular anomalies include bevacizumab, which is being used in hereditary hemorrhagic telangiectasia, and thalidomide for HHT and arteriovenous malformations. For more information, Dr. Adams recommended a comprehensive review of vascular anomalies, related genes, and treatments that was published in Circulation Research.

The goal of future drug therapies is to support normal growth, “so we don’t need a maximum tolerated dose,” Dr. Adams said. “We need to be very careful of short-term and long-term side effects.”

Going forward, she said that she would like to see more natural history studies of vascular anomalies, improved outcome measures for clinical trials, adaptive study design, preclinical testing, animal model studies, universal availability of genomic testing, improvement of NIH funding, research collaboration nationally and internationally, and industry support.

Dr. Adams disclosed that she is a consultant to Venthera and Novartis.

[email protected]

The U.S. Food and Drug Administration has approved lonapegsomatropin (Skytrofa, Ascendis Pharma), the first weekly subcutaneous injectable growth hormone for children with growth hormone deficiency (GHD).

The approval was based on the findings of the 52-week, phase 3 heiGHt trial in 161 treatment-naive pediatric patients with GHD, which was recently published in the Journal of Clinical Endocrinology & Metabolism.

Since 1987, the standard treatment for pediatric GHD, in which the pituitary gland does not produce enough growth hormone, has been a daily injection of somatropin (recombinant DNA human growth hormone).

“I am excited to be able to reduce the number of shots for some children requiring growth hormone therapy” with this new dosing option, Bradley S. Miller, MD, PhD, who was not involved with the research, said in an email.

“I am hopeful that a once-weekly growth hormone option will improve adherence to growth hormone therapy, leading to improved growth and metabolic outcomes,” added Dr. Miller, professor and division director, pediatric endocrinology, at the University of Minnesota Masonic Children’s Hospital, Minneapolis.

Lonapegsomatropin is approved for the treatment of pediatric patients age 1 year and older who weigh at least 11.5 kg (25.4 pounds) and have short stature due to inadequate secretion of endogenous growth hormone, according to the prescribing information.

The drug molecule consists of a prodrug of somatropin that is inactive when it is bound to a proprietary TransCon (transient conjugation) inert carrier using a TransCon linker. The three-part molecule breaks apart after injection, exposing the active somatropin that is slowly released.

The heiGHt trial demonstrated noninferiority of lonapegsomatropin to somatropin daily injections. Children who received weekly lonapegsomatropin grew 11.2 cm (4.4 inches) per year, whereas those who received an equivalent total dose of somatropin daily injections grew 10.3 cm (4.1 inches) per year.

Safety outcomes – the ratio of bone age to chronologic age, adverse events, tolerability, and immunogenicity – were similar in both groups.
 

Anticipated uptake, other drugs on horizon

Lonapegsomatropin is expected to be available shortly in the United States along with a suite of patient support programs, according to a company press release.

“The impact of the approval of lonapegsomatropin on clinical practice will depend upon its availability, coverage by insurance providers, and patient/provider comfort with using a new product,” Dr. Miller said.

For most pediatric endocrinologists, daily growth hormone has been available their entire careers, so he expects it will take some time for the pediatric endocrinology community to be comfortable prescribing long-acting growth hormone (LAGH), the name given to the once-weekly products.

In the meantime, an FDA decision on another once-weekly growth hormone, somatrogon (OPKO Health/Pfizer) for children with GHD is expected very soon, in October 2021.

And a weekly injectable somapacitan (Sogroya, Novo Nordisk), approved by the FDA in September last year for adults with GHD, is also being studied in children, with estimated study completion in 2024.

“Approval of more LAGH molecules, approval of LAGH for more indications, real-world evidence of safety, efficacy, and improved adherence, and personal experience with LAGH will all likely lead to increased LAGH use over time,” Dr. Miller speculated.

“Over the long-term, I expect insurance providers will cover LAGH products,” he surmised, “but that the price will be similar to or slightly higher than daily growth hormone.”

However, if improved adherence with LAGH is demonstrated and associated with better treatment outcomes, the price of LAGH will likely increase and use of daily growth hormone will decrease, he predicts.

Paul Saenger, MD, who was not involved with the research, believes “all three long-acting growth hormone drugs will eventually be approved for GHD in children.”

“The price will be the same or may be at most 10% more than daily growth hormone replacement,” Dr. Saenger, a pediatric endocrinologist and clinical assistant professor at NYU Long Island School of Medicine, New York, said in an email.

However, daily subcutaneous injections will still be warranted for certain children with GHD, Dr. Miller noted.

“Daily growth hormone may be better than LAGH for a small number of children who have severe GHD associated with hypoglycemia,” he said. “The low levels of growth hormone at the end of the weekly interval of LAGH may allow hypoglycemia to occur in this population.”
 

Phase 3 trial in 161 treatment-naive children with GHD

The heiGHt trial randomized treatment-naive prepubertal children with GHD 2:1 to weekly lonapegsomatropin or daily somatropin (Genotropin, Pfizer) at 73 sites in 15 countries.

The children were a mean age of 8.5 years (range, 3.2-13.1 years), 82% were boys, and 94% were White.

There were no reported serious adverse events or discontinuations related to lonapegsomatropin.

The most common adverse reactions in ≥5% of these pediatric patients were viral infection (15%), pyrexia (15%), cough (11%), nausea and vomiting (11%), hemorrhage (7%), diarrhea (6%), abdominal pain (6%), and arthralgia and arthritis (6%).

Both study groups reported low incidences of transient, non-neutralizing anti-hGH binding antibodies and no cases of persistent antibodies.

Trial limitations include the fact the study was not blinded (as patients received a weekly or daily injection) and drug doses were fixed at 0.24 mg human growth hormone/kg/week, although in real-world clinical practice, doses may be titrated.

Lonapegsomatropin has been studied in more than 300 children with GHD in the phase 3 program in the heiGHt trial (treatment-naive patients), fliGHt trial (treatment-experienced patients), and enliGHten trial (an ongoing long-term extension trial that includes some patients who have been taking lonapegsomatropin for more than 4 years).

The study was sponsored by Ascendis Pharma. Some of the phase 3 study authors are company employees.

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

The U.S. Food and Drug Administration has approved lonapegsomatropin (Skytrofa, Ascendis Pharma), the first weekly subcutaneous injectable growth hormone for children with growth hormone deficiency (GHD).

The approval was based on the findings of the 52-week, phase 3 heiGHt trial in 161 treatment-naive pediatric patients with GHD, which was recently published in the Journal of Clinical Endocrinology & Metabolism.

Since 1987, the standard treatment for pediatric GHD, in which the pituitary gland does not produce enough growth hormone, has been a daily injection of somatropin (recombinant DNA human growth hormone).

“I am excited to be able to reduce the number of shots for some children requiring growth hormone therapy” with this new dosing option, Bradley S. Miller, MD, PhD, who was not involved with the research, said in an email.

“I am hopeful that a once-weekly growth hormone option will improve adherence to growth hormone therapy, leading to improved growth and metabolic outcomes,” added Dr. Miller, professor and division director, pediatric endocrinology, at the University of Minnesota Masonic Children’s Hospital, Minneapolis.

Lonapegsomatropin is approved for the treatment of pediatric patients age 1 year and older who weigh at least 11.5 kg (25.4 pounds) and have short stature due to inadequate secretion of endogenous growth hormone, according to the prescribing information.

The drug molecule consists of a prodrug of somatropin that is inactive when it is bound to a proprietary TransCon (transient conjugation) inert carrier using a TransCon linker. The three-part molecule breaks apart after injection, exposing the active somatropin that is slowly released.

The heiGHt trial demonstrated noninferiority of lonapegsomatropin to somatropin daily injections. Children who received weekly lonapegsomatropin grew 11.2 cm (4.4 inches) per year, whereas those who received an equivalent total dose of somatropin daily injections grew 10.3 cm (4.1 inches) per year.

Safety outcomes – the ratio of bone age to chronologic age, adverse events, tolerability, and immunogenicity – were similar in both groups.
 

Anticipated uptake, other drugs on horizon

Lonapegsomatropin is expected to be available shortly in the United States along with a suite of patient support programs, according to a company press release.

“The impact of the approval of lonapegsomatropin on clinical practice will depend upon its availability, coverage by insurance providers, and patient/provider comfort with using a new product,” Dr. Miller said.

For most pediatric endocrinologists, daily growth hormone has been available their entire careers, so he expects it will take some time for the pediatric endocrinology community to be comfortable prescribing long-acting growth hormone (LAGH), the name given to the once-weekly products.

In the meantime, an FDA decision on another once-weekly growth hormone, somatrogon (OPKO Health/Pfizer) for children with GHD is expected very soon, in October 2021.

And a weekly injectable somapacitan (Sogroya, Novo Nordisk), approved by the FDA in September last year for adults with GHD, is also being studied in children, with estimated study completion in 2024.

“Approval of more LAGH molecules, approval of LAGH for more indications, real-world evidence of safety, efficacy, and improved adherence, and personal experience with LAGH will all likely lead to increased LAGH use over time,” Dr. Miller speculated.

“Over the long-term, I expect insurance providers will cover LAGH products,” he surmised, “but that the price will be similar to or slightly higher than daily growth hormone.”

However, if improved adherence with LAGH is demonstrated and associated with better treatment outcomes, the price of LAGH will likely increase and use of daily growth hormone will decrease, he predicts.

Paul Saenger, MD, who was not involved with the research, believes “all three long-acting growth hormone drugs will eventually be approved for GHD in children.”

“The price will be the same or may be at most 10% more than daily growth hormone replacement,” Dr. Saenger, a pediatric endocrinologist and clinical assistant professor at NYU Long Island School of Medicine, New York, said in an email.

However, daily subcutaneous injections will still be warranted for certain children with GHD, Dr. Miller noted.

“Daily growth hormone may be better than LAGH for a small number of children who have severe GHD associated with hypoglycemia,” he said. “The low levels of growth hormone at the end of the weekly interval of LAGH may allow hypoglycemia to occur in this population.”
 

Phase 3 trial in 161 treatment-naive children with GHD

The heiGHt trial randomized treatment-naive prepubertal children with GHD 2:1 to weekly lonapegsomatropin or daily somatropin (Genotropin, Pfizer) at 73 sites in 15 countries.

The children were a mean age of 8.5 years (range, 3.2-13.1 years), 82% were boys, and 94% were White.

There were no reported serious adverse events or discontinuations related to lonapegsomatropin.

The most common adverse reactions in ≥5% of these pediatric patients were viral infection (15%), pyrexia (15%), cough (11%), nausea and vomiting (11%), hemorrhage (7%), diarrhea (6%), abdominal pain (6%), and arthralgia and arthritis (6%).

Both study groups reported low incidences of transient, non-neutralizing anti-hGH binding antibodies and no cases of persistent antibodies.

Trial limitations include the fact the study was not blinded (as patients received a weekly or daily injection) and drug doses were fixed at 0.24 mg human growth hormone/kg/week, although in real-world clinical practice, doses may be titrated.

Lonapegsomatropin has been studied in more than 300 children with GHD in the phase 3 program in the heiGHt trial (treatment-naive patients), fliGHt trial (treatment-experienced patients), and enliGHten trial (an ongoing long-term extension trial that includes some patients who have been taking lonapegsomatropin for more than 4 years).

The study was sponsored by Ascendis Pharma. Some of the phase 3 study authors are company employees.

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

The U.S. Food and Drug Administration has approved lonapegsomatropin (Skytrofa, Ascendis Pharma), the first weekly subcutaneous injectable growth hormone for children with growth hormone deficiency (GHD).

The approval was based on the findings of the 52-week, phase 3 heiGHt trial in 161 treatment-naive pediatric patients with GHD, which was recently published in the Journal of Clinical Endocrinology & Metabolism.

Since 1987, the standard treatment for pediatric GHD, in which the pituitary gland does not produce enough growth hormone, has been a daily injection of somatropin (recombinant DNA human growth hormone).

“I am excited to be able to reduce the number of shots for some children requiring growth hormone therapy” with this new dosing option, Bradley S. Miller, MD, PhD, who was not involved with the research, said in an email.

“I am hopeful that a once-weekly growth hormone option will improve adherence to growth hormone therapy, leading to improved growth and metabolic outcomes,” added Dr. Miller, professor and division director, pediatric endocrinology, at the University of Minnesota Masonic Children’s Hospital, Minneapolis.

Lonapegsomatropin is approved for the treatment of pediatric patients age 1 year and older who weigh at least 11.5 kg (25.4 pounds) and have short stature due to inadequate secretion of endogenous growth hormone, according to the prescribing information.

The drug molecule consists of a prodrug of somatropin that is inactive when it is bound to a proprietary TransCon (transient conjugation) inert carrier using a TransCon linker. The three-part molecule breaks apart after injection, exposing the active somatropin that is slowly released.

The heiGHt trial demonstrated noninferiority of lonapegsomatropin to somatropin daily injections. Children who received weekly lonapegsomatropin grew 11.2 cm (4.4 inches) per year, whereas those who received an equivalent total dose of somatropin daily injections grew 10.3 cm (4.1 inches) per year.

Safety outcomes – the ratio of bone age to chronologic age, adverse events, tolerability, and immunogenicity – were similar in both groups.
 

Anticipated uptake, other drugs on horizon

Lonapegsomatropin is expected to be available shortly in the United States along with a suite of patient support programs, according to a company press release.

“The impact of the approval of lonapegsomatropin on clinical practice will depend upon its availability, coverage by insurance providers, and patient/provider comfort with using a new product,” Dr. Miller said.

For most pediatric endocrinologists, daily growth hormone has been available their entire careers, so he expects it will take some time for the pediatric endocrinology community to be comfortable prescribing long-acting growth hormone (LAGH), the name given to the once-weekly products.

In the meantime, an FDA decision on another once-weekly growth hormone, somatrogon (OPKO Health/Pfizer) for children with GHD is expected very soon, in October 2021.

And a weekly injectable somapacitan (Sogroya, Novo Nordisk), approved by the FDA in September last year for adults with GHD, is also being studied in children, with estimated study completion in 2024.

“Approval of more LAGH molecules, approval of LAGH for more indications, real-world evidence of safety, efficacy, and improved adherence, and personal experience with LAGH will all likely lead to increased LAGH use over time,” Dr. Miller speculated.

“Over the long-term, I expect insurance providers will cover LAGH products,” he surmised, “but that the price will be similar to or slightly higher than daily growth hormone.”

However, if improved adherence with LAGH is demonstrated and associated with better treatment outcomes, the price of LAGH will likely increase and use of daily growth hormone will decrease, he predicts.

Paul Saenger, MD, who was not involved with the research, believes “all three long-acting growth hormone drugs will eventually be approved for GHD in children.”

“The price will be the same or may be at most 10% more than daily growth hormone replacement,” Dr. Saenger, a pediatric endocrinologist and clinical assistant professor at NYU Long Island School of Medicine, New York, said in an email.

However, daily subcutaneous injections will still be warranted for certain children with GHD, Dr. Miller noted.

“Daily growth hormone may be better than LAGH for a small number of children who have severe GHD associated with hypoglycemia,” he said. “The low levels of growth hormone at the end of the weekly interval of LAGH may allow hypoglycemia to occur in this population.”
 

Phase 3 trial in 161 treatment-naive children with GHD

The heiGHt trial randomized treatment-naive prepubertal children with GHD 2:1 to weekly lonapegsomatropin or daily somatropin (Genotropin, Pfizer) at 73 sites in 15 countries.

The children were a mean age of 8.5 years (range, 3.2-13.1 years), 82% were boys, and 94% were White.

There were no reported serious adverse events or discontinuations related to lonapegsomatropin.

The most common adverse reactions in ≥5% of these pediatric patients were viral infection (15%), pyrexia (15%), cough (11%), nausea and vomiting (11%), hemorrhage (7%), diarrhea (6%), abdominal pain (6%), and arthralgia and arthritis (6%).

Both study groups reported low incidences of transient, non-neutralizing anti-hGH binding antibodies and no cases of persistent antibodies.

Trial limitations include the fact the study was not blinded (as patients received a weekly or daily injection) and drug doses were fixed at 0.24 mg human growth hormone/kg/week, although in real-world clinical practice, doses may be titrated.

Lonapegsomatropin has been studied in more than 300 children with GHD in the phase 3 program in the heiGHt trial (treatment-naive patients), fliGHt trial (treatment-experienced patients), and enliGHten trial (an ongoing long-term extension trial that includes some patients who have been taking lonapegsomatropin for more than 4 years).

The study was sponsored by Ascendis Pharma. Some of the phase 3 study authors are company employees.

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

Many but not all children with juvenile idiopathic arthritis (JIA) can regain remission after stopping and then restarting treatment, according to preliminary data from the ongoing Recapture-JIA study that were presented in a symposium sponsored by the Rheumatology Research Foundation.

The aim of this study is to evaluate the risks of discontinuing treatment after a period when JIA has been well controlled. Such data are of increasing interest to parents now that many children with JIA are achieving sustained periods of remission, according to Sarah Ringold, MD, a pediatric rheumatologist and associate professor of pediatrics at Seattle Children’s Hospital.

In follow-up so far, “recapture rates range from 50% to 76%” depending on type of JIA, reported Dr. Ringold, who said that patients with systemic JIA have so far been the most likely to achieve a good response when treatment is restarted.

The study is being conducted through the Childhood Arthritis and Rheumatology Research Alliance, which has 71 participating centers and has accrued data on more than 10,000 children with rheumatic diseases. For the study, the researchers identified 384 children with JIA who were already enrolled in the CARRA registry and had discontinued medications and then subsequently restarted them, and they also enrolled a prospective cohort of patients new to the registry who presented with flare after discontinuing their medication. Dr. Ringold reported on 64 of the patients in the prospective cohort.
 

Median time to flare: 219 days

Of findings so far, disease recurrence after discontinuation has been generally characterized by flares “of moderate activity” several months to more than a year after treatment discontinuation, according to Dr. Ringold, who emphasized repeatedly that these data are preliminary. The median time to a flare after treatment discontinuation was approximately 7 months (219 days).

In the combined cohorts, the median age at onset of JIA was 4 years. The median age at time of discontinuation was 9 years. More than half (55%) were taking a conventional disease-modifying antirheumatic drug (DMARD) and 35% were taking a tumor necrosis factor inhibitor at the time that their therapy was discontinued.

Most JIA types are represented. The most common form is rheumatoid factor–negative oligoarticular JIA. The main outcome looked the rate of clinically inactive disease at 6 months in children who had discontinued therapy after a period of remission. They defined clinically inactive disease as a Physician’s Global Assessment of less than 1 and an active joint count of 0.

Systemic JIA recapture rate at 6 months: 76%

At the time of disease flare after treatment discontinuation across both the retrospective and prospective cohorts, the median clinical Juvenile Arthritis Disease Activity Score based on 10 joints (cJADAS10; score range of 0-30) was 3.5. The recapture rate to clinically inactive disease at 6 months was 76% in those with systemic JIA and 50% in those with rheumatoid factor–positive polyarticular JIA. Other subtypes fell within this range. Rates of inactive disease at 6 months according to cJADAS10 score were lower, ranging from 26% with enthesitis-related arthritis/juvenile psoriatic arthritis to 57% with systemic JIA.

About 40% of those who restarted on therapy after a flare took the same medication again. About one-third of patients were restarted on glucocorticoids, mostly involving injections to inflamed joints, and data are not yet in about whether these were restarted alone or with other drugs, according to Dr. Ringold.

The final analysis of this study will explore clinical and laboratory variables associated with disease recapture. In the prospective cohort, which did not reach its planned enrollment of 150 children because the COVID pandemic, a broad array of these variables was evaluated at baseline.

Numerous studies have already looked at predictors of sustained remission after stopping medications of JIA, according to Dr. Ringold, but she said that there is relatively little information about outcomes in children who stop medications, flare, and are retreated. Other experts agree.

“We know little about how successfully DMARDs can be discontinued and used again after a disease flare,” reported Jens Klotsche, MD, a researcher at the German Rheumatism Research Center, which is part of the Leibniz Institute in Berlin. Dr. Klotsche, who is an author of a recent study that found etanercept effective for retreatment when children with JIA had discontinued therapy, agreed that “data from large cohort studies are necessary to support the treatment decisions by clinicians, parents, and patients.”

JIA recurrence risk is unclear

In a systematic review published 2 years ago, rates of flare following discontinuation of treatment for JIA were relatively high, but there were some limitations to this analysis, according to the lead author, Olha Halyabar, MD, a pediatric rheumatologist at Boston Children’s Hospital.

“The data in our systematic review showed that overall quality of evidence was low, with large variations and sometimes very different conclusions,” Dr. Halyabar said in an interview. She believes that the data generated by the CARRA analysis will be valuable, particularly in evaluating outcomes across subtypes.

“Even though, at this point, [previously published] reports indicate overall high rates of recurrence (>50% for some JIA subtypes), there are some encouraging studies from early treat-to-target strategies,” she said, adding that large datasets like those from CARRA offer an opportunity to gather data likely to be clinically useful.

Dr. Ringold cautioned that there are some limitations to the CARRA analysis, including some missing data from the retrospective cohort. She also pointed out that patients have been assessed at routine clinical visits rather than at standardized intervals, introducing a potential for bias.

For parents concerned about the costs, inconvenience, and side effects from sustained JIA treatment once remission is achieved, data from CARRA will allow clinicians to provide evidence-based counseling on balancing the risks of discontinuing therapy, including the likelihood of regaining remission when disease returns, against the goals of stopping treatment.

“Parents are having more conversations about when to stop medications,” Dr. Ringold said. She indicated that these data should be helpful for providing guidance.

Dr. Ringold, Dr. Klotsche, and Dr. Halyabar reported having no potential conflicts of interest.

Many but not all children with juvenile idiopathic arthritis (JIA) can regain remission after stopping and then restarting treatment, according to preliminary data from the ongoing Recapture-JIA study that were presented in a symposium sponsored by the Rheumatology Research Foundation.

The aim of this study is to evaluate the risks of discontinuing treatment after a period when JIA has been well controlled. Such data are of increasing interest to parents now that many children with JIA are achieving sustained periods of remission, according to Sarah Ringold, MD, a pediatric rheumatologist and associate professor of pediatrics at Seattle Children’s Hospital.

In follow-up so far, “recapture rates range from 50% to 76%” depending on type of JIA, reported Dr. Ringold, who said that patients with systemic JIA have so far been the most likely to achieve a good response when treatment is restarted.

The study is being conducted through the Childhood Arthritis and Rheumatology Research Alliance, which has 71 participating centers and has accrued data on more than 10,000 children with rheumatic diseases. For the study, the researchers identified 384 children with JIA who were already enrolled in the CARRA registry and had discontinued medications and then subsequently restarted them, and they also enrolled a prospective cohort of patients new to the registry who presented with flare after discontinuing their medication. Dr. Ringold reported on 64 of the patients in the prospective cohort.
 

Median time to flare: 219 days

Of findings so far, disease recurrence after discontinuation has been generally characterized by flares “of moderate activity” several months to more than a year after treatment discontinuation, according to Dr. Ringold, who emphasized repeatedly that these data are preliminary. The median time to a flare after treatment discontinuation was approximately 7 months (219 days).

In the combined cohorts, the median age at onset of JIA was 4 years. The median age at time of discontinuation was 9 years. More than half (55%) were taking a conventional disease-modifying antirheumatic drug (DMARD) and 35% were taking a tumor necrosis factor inhibitor at the time that their therapy was discontinued.

Most JIA types are represented. The most common form is rheumatoid factor–negative oligoarticular JIA. The main outcome looked the rate of clinically inactive disease at 6 months in children who had discontinued therapy after a period of remission. They defined clinically inactive disease as a Physician’s Global Assessment of less than 1 and an active joint count of 0.

Systemic JIA recapture rate at 6 months: 76%

At the time of disease flare after treatment discontinuation across both the retrospective and prospective cohorts, the median clinical Juvenile Arthritis Disease Activity Score based on 10 joints (cJADAS10; score range of 0-30) was 3.5. The recapture rate to clinically inactive disease at 6 months was 76% in those with systemic JIA and 50% in those with rheumatoid factor–positive polyarticular JIA. Other subtypes fell within this range. Rates of inactive disease at 6 months according to cJADAS10 score were lower, ranging from 26% with enthesitis-related arthritis/juvenile psoriatic arthritis to 57% with systemic JIA.

About 40% of those who restarted on therapy after a flare took the same medication again. About one-third of patients were restarted on glucocorticoids, mostly involving injections to inflamed joints, and data are not yet in about whether these were restarted alone or with other drugs, according to Dr. Ringold.

The final analysis of this study will explore clinical and laboratory variables associated with disease recapture. In the prospective cohort, which did not reach its planned enrollment of 150 children because the COVID pandemic, a broad array of these variables was evaluated at baseline.

Numerous studies have already looked at predictors of sustained remission after stopping medications of JIA, according to Dr. Ringold, but she said that there is relatively little information about outcomes in children who stop medications, flare, and are retreated. Other experts agree.

“We know little about how successfully DMARDs can be discontinued and used again after a disease flare,” reported Jens Klotsche, MD, a researcher at the German Rheumatism Research Center, which is part of the Leibniz Institute in Berlin. Dr. Klotsche, who is an author of a recent study that found etanercept effective for retreatment when children with JIA had discontinued therapy, agreed that “data from large cohort studies are necessary to support the treatment decisions by clinicians, parents, and patients.”

JIA recurrence risk is unclear

In a systematic review published 2 years ago, rates of flare following discontinuation of treatment for JIA were relatively high, but there were some limitations to this analysis, according to the lead author, Olha Halyabar, MD, a pediatric rheumatologist at Boston Children’s Hospital.

“The data in our systematic review showed that overall quality of evidence was low, with large variations and sometimes very different conclusions,” Dr. Halyabar said in an interview. She believes that the data generated by the CARRA analysis will be valuable, particularly in evaluating outcomes across subtypes.

“Even though, at this point, [previously published] reports indicate overall high rates of recurrence (>50% for some JIA subtypes), there are some encouraging studies from early treat-to-target strategies,” she said, adding that large datasets like those from CARRA offer an opportunity to gather data likely to be clinically useful.

Dr. Ringold cautioned that there are some limitations to the CARRA analysis, including some missing data from the retrospective cohort. She also pointed out that patients have been assessed at routine clinical visits rather than at standardized intervals, introducing a potential for bias.

For parents concerned about the costs, inconvenience, and side effects from sustained JIA treatment once remission is achieved, data from CARRA will allow clinicians to provide evidence-based counseling on balancing the risks of discontinuing therapy, including the likelihood of regaining remission when disease returns, against the goals of stopping treatment.

“Parents are having more conversations about when to stop medications,” Dr. Ringold said. She indicated that these data should be helpful for providing guidance.

Dr. Ringold, Dr. Klotsche, and Dr. Halyabar reported having no potential conflicts of interest.

Many but not all children with juvenile idiopathic arthritis (JIA) can regain remission after stopping and then restarting treatment, according to preliminary data from the ongoing Recapture-JIA study that were presented in a symposium sponsored by the Rheumatology Research Foundation.

The aim of this study is to evaluate the risks of discontinuing treatment after a period when JIA has been well controlled. Such data are of increasing interest to parents now that many children with JIA are achieving sustained periods of remission, according to Sarah Ringold, MD, a pediatric rheumatologist and associate professor of pediatrics at Seattle Children’s Hospital.

In follow-up so far, “recapture rates range from 50% to 76%” depending on type of JIA, reported Dr. Ringold, who said that patients with systemic JIA have so far been the most likely to achieve a good response when treatment is restarted.

The study is being conducted through the Childhood Arthritis and Rheumatology Research Alliance, which has 71 participating centers and has accrued data on more than 10,000 children with rheumatic diseases. For the study, the researchers identified 384 children with JIA who were already enrolled in the CARRA registry and had discontinued medications and then subsequently restarted them, and they also enrolled a prospective cohort of patients new to the registry who presented with flare after discontinuing their medication. Dr. Ringold reported on 64 of the patients in the prospective cohort.
 

Median time to flare: 219 days

Of findings so far, disease recurrence after discontinuation has been generally characterized by flares “of moderate activity” several months to more than a year after treatment discontinuation, according to Dr. Ringold, who emphasized repeatedly that these data are preliminary. The median time to a flare after treatment discontinuation was approximately 7 months (219 days).

In the combined cohorts, the median age at onset of JIA was 4 years. The median age at time of discontinuation was 9 years. More than half (55%) were taking a conventional disease-modifying antirheumatic drug (DMARD) and 35% were taking a tumor necrosis factor inhibitor at the time that their therapy was discontinued.

Most JIA types are represented. The most common form is rheumatoid factor–negative oligoarticular JIA. The main outcome looked the rate of clinically inactive disease at 6 months in children who had discontinued therapy after a period of remission. They defined clinically inactive disease as a Physician’s Global Assessment of less than 1 and an active joint count of 0.

Systemic JIA recapture rate at 6 months: 76%

At the time of disease flare after treatment discontinuation across both the retrospective and prospective cohorts, the median clinical Juvenile Arthritis Disease Activity Score based on 10 joints (cJADAS10; score range of 0-30) was 3.5. The recapture rate to clinically inactive disease at 6 months was 76% in those with systemic JIA and 50% in those with rheumatoid factor–positive polyarticular JIA. Other subtypes fell within this range. Rates of inactive disease at 6 months according to cJADAS10 score were lower, ranging from 26% with enthesitis-related arthritis/juvenile psoriatic arthritis to 57% with systemic JIA.

About 40% of those who restarted on therapy after a flare took the same medication again. About one-third of patients were restarted on glucocorticoids, mostly involving injections to inflamed joints, and data are not yet in about whether these were restarted alone or with other drugs, according to Dr. Ringold.

The final analysis of this study will explore clinical and laboratory variables associated with disease recapture. In the prospective cohort, which did not reach its planned enrollment of 150 children because the COVID pandemic, a broad array of these variables was evaluated at baseline.

Numerous studies have already looked at predictors of sustained remission after stopping medications of JIA, according to Dr. Ringold, but she said that there is relatively little information about outcomes in children who stop medications, flare, and are retreated. Other experts agree.

“We know little about how successfully DMARDs can be discontinued and used again after a disease flare,” reported Jens Klotsche, MD, a researcher at the German Rheumatism Research Center, which is part of the Leibniz Institute in Berlin. Dr. Klotsche, who is an author of a recent study that found etanercept effective for retreatment when children with JIA had discontinued therapy, agreed that “data from large cohort studies are necessary to support the treatment decisions by clinicians, parents, and patients.”

JIA recurrence risk is unclear

In a systematic review published 2 years ago, rates of flare following discontinuation of treatment for JIA were relatively high, but there were some limitations to this analysis, according to the lead author, Olha Halyabar, MD, a pediatric rheumatologist at Boston Children’s Hospital.

“The data in our systematic review showed that overall quality of evidence was low, with large variations and sometimes very different conclusions,” Dr. Halyabar said in an interview. She believes that the data generated by the CARRA analysis will be valuable, particularly in evaluating outcomes across subtypes.

“Even though, at this point, [previously published] reports indicate overall high rates of recurrence (>50% for some JIA subtypes), there are some encouraging studies from early treat-to-target strategies,” she said, adding that large datasets like those from CARRA offer an opportunity to gather data likely to be clinically useful.

Dr. Ringold cautioned that there are some limitations to the CARRA analysis, including some missing data from the retrospective cohort. She also pointed out that patients have been assessed at routine clinical visits rather than at standardized intervals, introducing a potential for bias.

For parents concerned about the costs, inconvenience, and side effects from sustained JIA treatment once remission is achieved, data from CARRA will allow clinicians to provide evidence-based counseling on balancing the risks of discontinuing therapy, including the likelihood of regaining remission when disease returns, against the goals of stopping treatment.

“Parents are having more conversations about when to stop medications,” Dr. Ringold said. She indicated that these data should be helpful for providing guidance.

Dr. Ringold, Dr. Klotsche, and Dr. Halyabar reported having no potential conflicts of interest.

The U.S. Food and Drug Administration has approved a new enzyme replacement therapy, avalglucosidase alfa (Nexviazyme, Genzyme), for patients aged 1 year and older with late-onset Pompe disease.

Pompe disease is a rare genetic disease that occurs in an estimated 1 in 40,000 births. It is caused by a genetic deficiency or dysfunction of the lysosomal enzyme acid alpha-glucosidase (GAA), which leads to a buildup of glycogen in skeletal and cardiac muscle cells, causing muscle weakness and premature death from respiratory failure or heart failure.

Nexviazyme, administered by intravenous infusion every 2 weeks, supplements GAA and helps reduce glycogen accumulation.

The approval of this product “brings patients with Pompe disease another enzyme replacement therapy option for this rare disease,” said Janet Maynard, MD, deputy director, Office of Rare Diseases, Pediatrics, Urologic and Reproductive Medicine, in the FDA’s Center for Drug Evaluation and Research, in a news release.

In 2010, the FDA approved alglucosidase alfa (Lumizyme) for the treatment of late-onset Pompe disease.

“The FDA will continue to work with stakeholders to advance the development of additional new, effective, and safe therapies for rare diseases, including Pompe disease,” said Dr. Maynard.

The approval is based on positive phase 3 data that demonstrated improvements in key disease burden measures, including respiratory function and walking disease, and that established the drug’s safety profile, Genzyme said in a news release.

The most common side effects were headache, fatigue, diarrhea, nausea, joint pain, dizziness, myalgia, pruritus, vomiting, dyspnea, erythema, paresthesia, and urticaria.

Serious reactions included hypersensitivity reactions, such as anaphylaxis, and infusion-associated reactions, including respiratory distress, chills, and pyrexia.

Patients susceptible to fluid volume overload or those with compromised cardiac or respiratory function may be at risk for serious acute cardiorespiratory failure.

The FDA granted Nexviazyme orphan drug designation, priority review, and breakthrough status.

Genzyme expects the new therapy to be available in the United States in the coming weeks and said it will be priced on par with Lumizyme.

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

The U.S. Food and Drug Administration has approved a new enzyme replacement therapy, avalglucosidase alfa (Nexviazyme, Genzyme), for patients aged 1 year and older with late-onset Pompe disease.

Pompe disease is a rare genetic disease that occurs in an estimated 1 in 40,000 births. It is caused by a genetic deficiency or dysfunction of the lysosomal enzyme acid alpha-glucosidase (GAA), which leads to a buildup of glycogen in skeletal and cardiac muscle cells, causing muscle weakness and premature death from respiratory failure or heart failure.

Nexviazyme, administered by intravenous infusion every 2 weeks, supplements GAA and helps reduce glycogen accumulation.

The approval of this product “brings patients with Pompe disease another enzyme replacement therapy option for this rare disease,” said Janet Maynard, MD, deputy director, Office of Rare Diseases, Pediatrics, Urologic and Reproductive Medicine, in the FDA’s Center for Drug Evaluation and Research, in a news release.

In 2010, the FDA approved alglucosidase alfa (Lumizyme) for the treatment of late-onset Pompe disease.

“The FDA will continue to work with stakeholders to advance the development of additional new, effective, and safe therapies for rare diseases, including Pompe disease,” said Dr. Maynard.

The approval is based on positive phase 3 data that demonstrated improvements in key disease burden measures, including respiratory function and walking disease, and that established the drug’s safety profile, Genzyme said in a news release.

The most common side effects were headache, fatigue, diarrhea, nausea, joint pain, dizziness, myalgia, pruritus, vomiting, dyspnea, erythema, paresthesia, and urticaria.

Serious reactions included hypersensitivity reactions, such as anaphylaxis, and infusion-associated reactions, including respiratory distress, chills, and pyrexia.

Patients susceptible to fluid volume overload or those with compromised cardiac or respiratory function may be at risk for serious acute cardiorespiratory failure.

The FDA granted Nexviazyme orphan drug designation, priority review, and breakthrough status.

Genzyme expects the new therapy to be available in the United States in the coming weeks and said it will be priced on par with Lumizyme.

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

The U.S. Food and Drug Administration has approved a new enzyme replacement therapy, avalglucosidase alfa (Nexviazyme, Genzyme), for patients aged 1 year and older with late-onset Pompe disease.

Pompe disease is a rare genetic disease that occurs in an estimated 1 in 40,000 births. It is caused by a genetic deficiency or dysfunction of the lysosomal enzyme acid alpha-glucosidase (GAA), which leads to a buildup of glycogen in skeletal and cardiac muscle cells, causing muscle weakness and premature death from respiratory failure or heart failure.

Nexviazyme, administered by intravenous infusion every 2 weeks, supplements GAA and helps reduce glycogen accumulation.

The approval of this product “brings patients with Pompe disease another enzyme replacement therapy option for this rare disease,” said Janet Maynard, MD, deputy director, Office of Rare Diseases, Pediatrics, Urologic and Reproductive Medicine, in the FDA’s Center for Drug Evaluation and Research, in a news release.

In 2010, the FDA approved alglucosidase alfa (Lumizyme) for the treatment of late-onset Pompe disease.

“The FDA will continue to work with stakeholders to advance the development of additional new, effective, and safe therapies for rare diseases, including Pompe disease,” said Dr. Maynard.

The approval is based on positive phase 3 data that demonstrated improvements in key disease burden measures, including respiratory function and walking disease, and that established the drug’s safety profile, Genzyme said in a news release.

The most common side effects were headache, fatigue, diarrhea, nausea, joint pain, dizziness, myalgia, pruritus, vomiting, dyspnea, erythema, paresthesia, and urticaria.

Serious reactions included hypersensitivity reactions, such as anaphylaxis, and infusion-associated reactions, including respiratory distress, chills, and pyrexia.

Patients susceptible to fluid volume overload or those with compromised cardiac or respiratory function may be at risk for serious acute cardiorespiratory failure.

The FDA granted Nexviazyme orphan drug designation, priority review, and breakthrough status.

Genzyme expects the new therapy to be available in the United States in the coming weeks and said it will be priced on par with Lumizyme.

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

To the Editor:

A 62-year-old woman with a history of dermatomyositis (DM) presented to dermatology clinic for evaluation of multiple subcutaneous nodules. Two years prior to the current presentation, the patient was diagnosed by her primary care physician with DM based on clinical presentation. She initially developed body aches, muscle pain, and weakness of the upper extremities, specifically around the shoulders, and later the lower extremities, specifically around the thighs. The initial physical examination revealed pain with movement, tenderness to palpation, and proximal extremity weakness. The patient also noted a 50-lb weight loss. Over the next year, she noted dysphagia and developed multiple subcutaneous nodules on the right arm, chest, and left axilla. Subsequently, she developed a violaceous, hyperpigmented, periorbital rash and erythema of the anterior chest. She did not experience hair loss, oral ulcers, photosensitivity, or joint pain.

Laboratory testing in the months following the initial presentation revealed a creatine phosphokinase level of 436 U/L (reference range, 20–200 U/L), an erythrocyte sedimentation rate of 60 mm/h (reference range, <31 mm/h), and an aldolase level of 10.4 U/L (reference range, 1.0–8.0 U/L). Lactate dehydrogenase and thyroid function tests were within normal limits. Antinuclear antibodies, anti–double-stranded DNA, anti-Smith antibodies, anti-ribonucleoprotein, anti–Jo-1 antibodies, and anti–smooth muscle antibodies all were negative. Total blood complement levels were elevated, but complement C3 and C4 were within normal limits. Imaging demonstrated normal chest radiographs, and a modified barium swallow confirmed swallowing dysfunction. A right quadricep muscle biopsy confirmed the diagnosis of DM. A malignancy work-up including mammography, colonoscopy, and computed tomography of the chest, abdomen, and pelvis was negative aside from nodular opacities in the chest. She was treated with prednisone (60 mg, 0.9 mg/kg) daily and methotrexate (15–20 mg) weekly for several months. While the treatment attenuated the rash and improved weakness, the nodules persisted, prompting a referral to dermatology.

Physical examination at the dermatology clinic demonstrated the persistent subcutaneous nodules were indurated and bilaterally located on the arms, axillae, chest, abdomen, buttocks, and thighs with no pain or erythema (Figure). Laboratory tests demonstrated a normal creatine phosphokinase level, elevated erythrocyte sedimentation rate (70 mm/h), and elevated aldolase level (9.3 U/L). Complement levels were elevated, though complement C3 and C4 remained within normal limits. Histopathology of nodules from the medial right upper arm and left thigh showed lobular panniculitis with fat necrosis, calcification, and interface changes. The patient was treated for several months with daily mycophenolate mofetil (1 g increased to 3 g) and daily hydroxychloroquine (200 mg) without any effect on the nodules.

A majority of the reported panniculitis cases in DM have responded to treatment with prednisone; however, treatment with prednisone has been more recalcitrant in other cases. Reports of successful additional therapies include methotrexate, cyclosporine, azathioprine, hydroxychloroquine, intravenous immunoglobulin, mepacrine, or a combination of these entities.^19,22 In most cases, improvement of the panniculitis and other DM symptoms occurred simultaneously.²⁵ It is noteworthy that the muscular symptoms often resolved more rapidly than cutaneous manifestations.³³ Few reported cases (6 including the current case) found a persistent panniculitis despite improvement and remission of the myositis.^3,5,10,11,30

Our patient was treated with both prednisone and methotrexate for several months, leading to remission of muscular symptoms (along with return to baseline of creatine phosphokinase), yet the panniculitis did not improve. The subcutaneous nodules also did not respond to treatment with mycophenolate mofetil and hydroxychloroquine.

Recent immunohistochemical studies have suggested that panniculitic lesions show better outcomes with immunosuppressive therapy when compared with other DM-related skin lesions.⁴⁰ However, this was not the case for our patient, who after months of immunosuppressive therapy showed complete resolution of the periorbital and chest rashes with persistence of multiple indurated subcutaneous nodules.

Our case adds to a number of reports of DM presenting with panniculitis. Our patient fit the classic demographic of previously reported cases, as she was an adult woman without evidence of underlying malignancy; however, our case remains an example of the therapeutic challenge that exists when encountering a persistent, treatment-resistant panniculitis despite resolution of all other features of DM.

TABLE IS AVAILABLE IN THE PDF OF THIS ARTICLE

To the Editor:

A 62-year-old woman with a history of dermatomyositis (DM) presented to dermatology clinic for evaluation of multiple subcutaneous nodules. Two years prior to the current presentation, the patient was diagnosed by her primary care physician with DM based on clinical presentation. She initially developed body aches, muscle pain, and weakness of the upper extremities, specifically around the shoulders, and later the lower extremities, specifically around the thighs. The initial physical examination revealed pain with movement, tenderness to palpation, and proximal extremity weakness. The patient also noted a 50-lb weight loss. Over the next year, she noted dysphagia and developed multiple subcutaneous nodules on the right arm, chest, and left axilla. Subsequently, she developed a violaceous, hyperpigmented, periorbital rash and erythema of the anterior chest. She did not experience hair loss, oral ulcers, photosensitivity, or joint pain.

Laboratory testing in the months following the initial presentation revealed a creatine phosphokinase level of 436 U/L (reference range, 20–200 U/L), an erythrocyte sedimentation rate of 60 mm/h (reference range, <31 mm/h), and an aldolase level of 10.4 U/L (reference range, 1.0–8.0 U/L). Lactate dehydrogenase and thyroid function tests were within normal limits. Antinuclear antibodies, anti–double-stranded DNA, anti-Smith antibodies, anti-ribonucleoprotein, anti–Jo-1 antibodies, and anti–smooth muscle antibodies all were negative. Total blood complement levels were elevated, but complement C3 and C4 were within normal limits. Imaging demonstrated normal chest radiographs, and a modified barium swallow confirmed swallowing dysfunction. A right quadricep muscle biopsy confirmed the diagnosis of DM. A malignancy work-up including mammography, colonoscopy, and computed tomography of the chest, abdomen, and pelvis was negative aside from nodular opacities in the chest. She was treated with prednisone (60 mg, 0.9 mg/kg) daily and methotrexate (15–20 mg) weekly for several months. While the treatment attenuated the rash and improved weakness, the nodules persisted, prompting a referral to dermatology.

Physical examination at the dermatology clinic demonstrated the persistent subcutaneous nodules were indurated and bilaterally located on the arms, axillae, chest, abdomen, buttocks, and thighs with no pain or erythema (Figure). Laboratory tests demonstrated a normal creatine phosphokinase level, elevated erythrocyte sedimentation rate (70 mm/h), and elevated aldolase level (9.3 U/L). Complement levels were elevated, though complement C3 and C4 remained within normal limits. Histopathology of nodules from the medial right upper arm and left thigh showed lobular panniculitis with fat necrosis, calcification, and interface changes. The patient was treated for several months with daily mycophenolate mofetil (1 g increased to 3 g) and daily hydroxychloroquine (200 mg) without any effect on the nodules.

A majority of the reported panniculitis cases in DM have responded to treatment with prednisone; however, treatment with prednisone has been more recalcitrant in other cases. Reports of successful additional therapies include methotrexate, cyclosporine, azathioprine, hydroxychloroquine, intravenous immunoglobulin, mepacrine, or a combination of these entities.^19,22 In most cases, improvement of the panniculitis and other DM symptoms occurred simultaneously.²⁵ It is noteworthy that the muscular symptoms often resolved more rapidly than cutaneous manifestations.³³ Few reported cases (6 including the current case) found a persistent panniculitis despite improvement and remission of the myositis.^3,5,10,11,30

Our patient was treated with both prednisone and methotrexate for several months, leading to remission of muscular symptoms (along with return to baseline of creatine phosphokinase), yet the panniculitis did not improve. The subcutaneous nodules also did not respond to treatment with mycophenolate mofetil and hydroxychloroquine.

Recent immunohistochemical studies have suggested that panniculitic lesions show better outcomes with immunosuppressive therapy when compared with other DM-related skin lesions.⁴⁰ However, this was not the case for our patient, who after months of immunosuppressive therapy showed complete resolution of the periorbital and chest rashes with persistence of multiple indurated subcutaneous nodules.

Our case adds to a number of reports of DM presenting with panniculitis. Our patient fit the classic demographic of previously reported cases, as she was an adult woman without evidence of underlying malignancy; however, our case remains an example of the therapeutic challenge that exists when encountering a persistent, treatment-resistant panniculitis despite resolution of all other features of DM.

TABLE IS AVAILABLE IN THE PDF OF THIS ARTICLE

To the Editor:

A 62-year-old woman with a history of dermatomyositis (DM) presented to dermatology clinic for evaluation of multiple subcutaneous nodules. Two years prior to the current presentation, the patient was diagnosed by her primary care physician with DM based on clinical presentation. She initially developed body aches, muscle pain, and weakness of the upper extremities, specifically around the shoulders, and later the lower extremities, specifically around the thighs. The initial physical examination revealed pain with movement, tenderness to palpation, and proximal extremity weakness. The patient also noted a 50-lb weight loss. Over the next year, she noted dysphagia and developed multiple subcutaneous nodules on the right arm, chest, and left axilla. Subsequently, she developed a violaceous, hyperpigmented, periorbital rash and erythema of the anterior chest. She did not experience hair loss, oral ulcers, photosensitivity, or joint pain.

Laboratory testing in the months following the initial presentation revealed a creatine phosphokinase level of 436 U/L (reference range, 20–200 U/L), an erythrocyte sedimentation rate of 60 mm/h (reference range, <31 mm/h), and an aldolase level of 10.4 U/L (reference range, 1.0–8.0 U/L). Lactate dehydrogenase and thyroid function tests were within normal limits. Antinuclear antibodies, anti–double-stranded DNA, anti-Smith antibodies, anti-ribonucleoprotein, anti–Jo-1 antibodies, and anti–smooth muscle antibodies all were negative. Total blood complement levels were elevated, but complement C3 and C4 were within normal limits. Imaging demonstrated normal chest radiographs, and a modified barium swallow confirmed swallowing dysfunction. A right quadricep muscle biopsy confirmed the diagnosis of DM. A malignancy work-up including mammography, colonoscopy, and computed tomography of the chest, abdomen, and pelvis was negative aside from nodular opacities in the chest. She was treated with prednisone (60 mg, 0.9 mg/kg) daily and methotrexate (15–20 mg) weekly for several months. While the treatment attenuated the rash and improved weakness, the nodules persisted, prompting a referral to dermatology.

Physical examination at the dermatology clinic demonstrated the persistent subcutaneous nodules were indurated and bilaterally located on the arms, axillae, chest, abdomen, buttocks, and thighs with no pain or erythema (Figure). Laboratory tests demonstrated a normal creatine phosphokinase level, elevated erythrocyte sedimentation rate (70 mm/h), and elevated aldolase level (9.3 U/L). Complement levels were elevated, though complement C3 and C4 remained within normal limits. Histopathology of nodules from the medial right upper arm and left thigh showed lobular panniculitis with fat necrosis, calcification, and interface changes. The patient was treated for several months with daily mycophenolate mofetil (1 g increased to 3 g) and daily hydroxychloroquine (200 mg) without any effect on the nodules.

A majority of the reported panniculitis cases in DM have responded to treatment with prednisone; however, treatment with prednisone has been more recalcitrant in other cases. Reports of successful additional therapies include methotrexate, cyclosporine, azathioprine, hydroxychloroquine, intravenous immunoglobulin, mepacrine, or a combination of these entities.^19,22 In most cases, improvement of the panniculitis and other DM symptoms occurred simultaneously.²⁵ It is noteworthy that the muscular symptoms often resolved more rapidly than cutaneous manifestations.³³ Few reported cases (6 including the current case) found a persistent panniculitis despite improvement and remission of the myositis.^3,5,10,11,30

Our patient was treated with both prednisone and methotrexate for several months, leading to remission of muscular symptoms (along with return to baseline of creatine phosphokinase), yet the panniculitis did not improve. The subcutaneous nodules also did not respond to treatment with mycophenolate mofetil and hydroxychloroquine.

Recent immunohistochemical studies have suggested that panniculitic lesions show better outcomes with immunosuppressive therapy when compared with other DM-related skin lesions.⁴⁰ However, this was not the case for our patient, who after months of immunosuppressive therapy showed complete resolution of the periorbital and chest rashes with persistence of multiple indurated subcutaneous nodules.

Our case adds to a number of reports of DM presenting with panniculitis. Our patient fit the classic demographic of previously reported cases, as she was an adult woman without evidence of underlying malignancy; however, our case remains an example of the therapeutic challenge that exists when encountering a persistent, treatment-resistant panniculitis despite resolution of all other features of DM.

TABLE IS AVAILABLE IN THE PDF OF THIS ARTICLE

Study Overview

Objective. To evaluate the efficacy and safety of the combination of nivolumab plus cabozantinib as compared with sunitinib monotherapy in the treatment of previously untreated advanced renal cell carcinoma (RCC).

Design. Multicenter, international, open-label, randomized, phase 3 trial.

Intervention. Patients were randomized in a 1:1 fashion to 1 of 2 treatment arms:

• Arm A: Nivolumab intravenously 240 mg every 2 weeks plus cabozantinib orally 40 mg once daily.
• Arm B: Sunitinib orally 50 mg daily for 4 weeks, followed by 2 weeks off therapy (6-week cycle).

Randomization was stratified by the International Metastatic RCC Database Consortium prognostic risk score (low-, intermediate-, and high-risk). Treatment was continued until disease progression or development of unacceptable toxic side effects with a maximum of 2-year duration of Nivolumab therapy.

Settings and participants. Adults with previously untreated advanced RCC with a clear cell component were eligible for enrollment. Subjects were excluded if they had active central nervous system metastases or active autoimmune disease.

Main outcome measures. The primary outcome of this study was progression-free survival (PFS) as assessed by an independent review committee. Secondary endpoints included overall survival, objective response rate, safety, and PFS as assessed by investigators. All subgroup analyses were prespecified. Efficacy was assessed in the intention-to-treat population, including all patients who underwent randomization.

Main results. A total of 651 patients underwent randomization: 323 to the nivolumab plus cabozantinib group, and 328 to the sunitinib group. Baseline demographics were balanced. The median follow-up period for overall survival (OS) was 18.1 months. The primary reason for treatment discontinuation in any group was disease progression. PFS as indicated by an independent review committee was significantly longer in the nivolumab plus cabozantinib group compared to the sunitinib group (median 16.6 months vs 8.2 months; hazard ratio [HR] 0.51, P < .001). The median OS was not reached for any group. Overall survival was longer in the nivolumab plus cabozantinib group compared to the sunitinib group (HR 0.60, 95% CI: 0.40-0.89; P = .001). The objective response rate was 55.7% with the nivolumab plus cabozantinib group versus 27.1% with sunitinib (P < .001). The complete response rate was 8% in the nivolumab plus cabozantinib group compared to 4.6% in the sunitinib group. The median time to response was 2.8 months with nivolumab plus cabozantinib and 4.2 months in the sunitinib group, while the median duration of response was 20.2 months and 11.5 months, respectively.

Nearly all patients (about 99% in each group) had an adverse event (AE). Hypertension was the most common side effect, with grade 3 or higher seen in 12.5% in the nivolumab plus cabzantinib group and 13.1% in the sunitinib group. Other grade 3 or higher side effects occurring in at least 10% of patients in any group were hyponatremia, diarrhea, palmar-plantar erythrodysesthesia, hypothyroidism, and fatigue. AEs of any cause leading to discontinuation of the therapy occurred in 19.7% in the nivolumab plus cabzantinib group vs 16.9% of the sunitinib group. One death was considered to be treatment-related (small intestinal perforation) in the nivolumab plus cabozantinib group vs 2 treatment-related deaths with sunitinib (pneumonia and respiratory distress). In the nivolumab plus cabozantinib group, 57% of the patients had a dose reduction of cabozantinib and 52% had a reduction in sunitinib dosage.

Using the Functional Assessment of Cancer Therapy-Kidney Symptoms Index, patients in the nivolumab plus cabozantinib group reported better health-related quality of life and less disease-related symptoms compared to the sunitinib group.

Commentary

The treatment landscape for frontline therapy for patients with advanced RCC has rapidly expanded over the last several years and has revolutionized cancer care. Ushered in by the results from the CheckMate 214 study highlighting the efficacy of dual checkpoint inhibition with nivolumab and ipilimumab in intermediate and poor risk patients, several subsequent trials have demonstrated improved outcomes with combination therapy with immune checkpoint inhibitors and tyrosine-kinase inhibitors (TKI). To date, data from Keynote-426 (pembrolizumab plus axitinib vs sunitinib), Javelin Renal 101 (avelumab plus axitinib vs sunitinib) and the CLEAR trial (lenvatinib plus pembrolizumab vs levatinib plus everolimus vs sunitinib) have demonstrated superiority of immune checkpoint inhibitor/TKI combinations over sunitinb in the first-line setting.^1-5

The current phase 3, CheckMate 9ER trial adds yet another dynamic option for patients with advanced clear cell RCC. While cross-trial comparisons are fraught with important caveats, the median PFS of almost 16.6 months and complete response rate of 8% the nivolumab plus cabozantinib group compares favorably with other combinations. Data from the CLEAR study with the combination of lenvatinib and pembrolizumab showed a complete response rate approaching 16%. Importantly, the current study highlights improved quality of life with the combination of cabozantinib and nivolumab compared to sunitinib alone adding to the efficacy and benefits of this combination treatment.

The selection of first line therapy for patients with advanced RCC should be always guided by individual patient characteristics, and any single immune checkpoint inhibitor/TKI combination is not “superior” to any other. Perhaps more importantly is developing an understanding of the overlapping toxicity profiles of checkpoint inhibitors and TKIs. Again, this trial results are consistent with prior studies in terms of the adverse event profile which were not trivial, and almost all patients (99%) experienced AEs. It is important for oncologists to understand the management of the toxicities with these combinations and dose reductions as appropriate. It is worth noting that 19% of patients with nivolumab plus cabozantinib received glucocorticoids for management of immune-related AEs.

While long-term follow-up data will be needed to further understand the durability of response to this combination, nivolumab-cabozantinib represents an exciting new option for patients with advanced clear cell RCC. As we continue to see improvement in outcomes in clear cell histology, further work must focus on optimization of therapy in non-clear cell RCC as this is a population that is not represented in these data sets. Furthermore, future efforts should begin to explore triplet combinations and biomarker driven patient selection for upfront therapy in ordercontinue to improve outcomes in patients with advanced RCC.

Applications for Clinical Practice

The combination of nivolumab plus cabozantinib adds to the growing list of highly active checkpoint inhibitor/TKI combinations for first-line treatment of advanced RCC. With significant higher response rates, improved outcomes, and improvement in the quality of life, this combination will add another standard treatment option for patients with previously untreated advanced RCC.

Study Overview

Objective. To evaluate the efficacy and safety of the combination of nivolumab plus cabozantinib as compared with sunitinib monotherapy in the treatment of previously untreated advanced renal cell carcinoma (RCC).

Design. Multicenter, international, open-label, randomized, phase 3 trial.

Intervention. Patients were randomized in a 1:1 fashion to 1 of 2 treatment arms:

• Arm A: Nivolumab intravenously 240 mg every 2 weeks plus cabozantinib orally 40 mg once daily.
• Arm B: Sunitinib orally 50 mg daily for 4 weeks, followed by 2 weeks off therapy (6-week cycle).

Randomization was stratified by the International Metastatic RCC Database Consortium prognostic risk score (low-, intermediate-, and high-risk). Treatment was continued until disease progression or development of unacceptable toxic side effects with a maximum of 2-year duration of Nivolumab therapy.

Settings and participants. Adults with previously untreated advanced RCC with a clear cell component were eligible for enrollment. Subjects were excluded if they had active central nervous system metastases or active autoimmune disease.

Main outcome measures. The primary outcome of this study was progression-free survival (PFS) as assessed by an independent review committee. Secondary endpoints included overall survival, objective response rate, safety, and PFS as assessed by investigators. All subgroup analyses were prespecified. Efficacy was assessed in the intention-to-treat population, including all patients who underwent randomization.

Main results. A total of 651 patients underwent randomization: 323 to the nivolumab plus cabozantinib group, and 328 to the sunitinib group. Baseline demographics were balanced. The median follow-up period for overall survival (OS) was 18.1 months. The primary reason for treatment discontinuation in any group was disease progression. PFS as indicated by an independent review committee was significantly longer in the nivolumab plus cabozantinib group compared to the sunitinib group (median 16.6 months vs 8.2 months; hazard ratio [HR] 0.51, P < .001). The median OS was not reached for any group. Overall survival was longer in the nivolumab plus cabozantinib group compared to the sunitinib group (HR 0.60, 95% CI: 0.40-0.89; P = .001). The objective response rate was 55.7% with the nivolumab plus cabozantinib group versus 27.1% with sunitinib (P < .001). The complete response rate was 8% in the nivolumab plus cabozantinib group compared to 4.6% in the sunitinib group. The median time to response was 2.8 months with nivolumab plus cabozantinib and 4.2 months in the sunitinib group, while the median duration of response was 20.2 months and 11.5 months, respectively.

Nearly all patients (about 99% in each group) had an adverse event (AE). Hypertension was the most common side effect, with grade 3 or higher seen in 12.5% in the nivolumab plus cabzantinib group and 13.1% in the sunitinib group. Other grade 3 or higher side effects occurring in at least 10% of patients in any group were hyponatremia, diarrhea, palmar-plantar erythrodysesthesia, hypothyroidism, and fatigue. AEs of any cause leading to discontinuation of the therapy occurred in 19.7% in the nivolumab plus cabzantinib group vs 16.9% of the sunitinib group. One death was considered to be treatment-related (small intestinal perforation) in the nivolumab plus cabozantinib group vs 2 treatment-related deaths with sunitinib (pneumonia and respiratory distress). In the nivolumab plus cabozantinib group, 57% of the patients had a dose reduction of cabozantinib and 52% had a reduction in sunitinib dosage.

Using the Functional Assessment of Cancer Therapy-Kidney Symptoms Index, patients in the nivolumab plus cabozantinib group reported better health-related quality of life and less disease-related symptoms compared to the sunitinib group.

Commentary

The treatment landscape for frontline therapy for patients with advanced RCC has rapidly expanded over the last several years and has revolutionized cancer care. Ushered in by the results from the CheckMate 214 study highlighting the efficacy of dual checkpoint inhibition with nivolumab and ipilimumab in intermediate and poor risk patients, several subsequent trials have demonstrated improved outcomes with combination therapy with immune checkpoint inhibitors and tyrosine-kinase inhibitors (TKI). To date, data from Keynote-426 (pembrolizumab plus axitinib vs sunitinib), Javelin Renal 101 (avelumab plus axitinib vs sunitinib) and the CLEAR trial (lenvatinib plus pembrolizumab vs levatinib plus everolimus vs sunitinib) have demonstrated superiority of immune checkpoint inhibitor/TKI combinations over sunitinb in the first-line setting.^1-5

The current phase 3, CheckMate 9ER trial adds yet another dynamic option for patients with advanced clear cell RCC. While cross-trial comparisons are fraught with important caveats, the median PFS of almost 16.6 months and complete response rate of 8% the nivolumab plus cabozantinib group compares favorably with other combinations. Data from the CLEAR study with the combination of lenvatinib and pembrolizumab showed a complete response rate approaching 16%. Importantly, the current study highlights improved quality of life with the combination of cabozantinib and nivolumab compared to sunitinib alone adding to the efficacy and benefits of this combination treatment.

The selection of first line therapy for patients with advanced RCC should be always guided by individual patient characteristics, and any single immune checkpoint inhibitor/TKI combination is not “superior” to any other. Perhaps more importantly is developing an understanding of the overlapping toxicity profiles of checkpoint inhibitors and TKIs. Again, this trial results are consistent with prior studies in terms of the adverse event profile which were not trivial, and almost all patients (99%) experienced AEs. It is important for oncologists to understand the management of the toxicities with these combinations and dose reductions as appropriate. It is worth noting that 19% of patients with nivolumab plus cabozantinib received glucocorticoids for management of immune-related AEs.

While long-term follow-up data will be needed to further understand the durability of response to this combination, nivolumab-cabozantinib represents an exciting new option for patients with advanced clear cell RCC. As we continue to see improvement in outcomes in clear cell histology, further work must focus on optimization of therapy in non-clear cell RCC as this is a population that is not represented in these data sets. Furthermore, future efforts should begin to explore triplet combinations and biomarker driven patient selection for upfront therapy in ordercontinue to improve outcomes in patients with advanced RCC.

Applications for Clinical Practice

The combination of nivolumab plus cabozantinib adds to the growing list of highly active checkpoint inhibitor/TKI combinations for first-line treatment of advanced RCC. With significant higher response rates, improved outcomes, and improvement in the quality of life, this combination will add another standard treatment option for patients with previously untreated advanced RCC.

Study Overview

Objective. To evaluate the efficacy and safety of the combination of nivolumab plus cabozantinib as compared with sunitinib monotherapy in the treatment of previously untreated advanced renal cell carcinoma (RCC).

Design. Multicenter, international, open-label, randomized, phase 3 trial.

Intervention. Patients were randomized in a 1:1 fashion to 1 of 2 treatment arms:

• Arm A: Nivolumab intravenously 240 mg every 2 weeks plus cabozantinib orally 40 mg once daily.
• Arm B: Sunitinib orally 50 mg daily for 4 weeks, followed by 2 weeks off therapy (6-week cycle).

Randomization was stratified by the International Metastatic RCC Database Consortium prognostic risk score (low-, intermediate-, and high-risk). Treatment was continued until disease progression or development of unacceptable toxic side effects with a maximum of 2-year duration of Nivolumab therapy.

Settings and participants. Adults with previously untreated advanced RCC with a clear cell component were eligible for enrollment. Subjects were excluded if they had active central nervous system metastases or active autoimmune disease.

Main outcome measures. The primary outcome of this study was progression-free survival (PFS) as assessed by an independent review committee. Secondary endpoints included overall survival, objective response rate, safety, and PFS as assessed by investigators. All subgroup analyses were prespecified. Efficacy was assessed in the intention-to-treat population, including all patients who underwent randomization.

Main results. A total of 651 patients underwent randomization: 323 to the nivolumab plus cabozantinib group, and 328 to the sunitinib group. Baseline demographics were balanced. The median follow-up period for overall survival (OS) was 18.1 months. The primary reason for treatment discontinuation in any group was disease progression. PFS as indicated by an independent review committee was significantly longer in the nivolumab plus cabozantinib group compared to the sunitinib group (median 16.6 months vs 8.2 months; hazard ratio [HR] 0.51, P < .001). The median OS was not reached for any group. Overall survival was longer in the nivolumab plus cabozantinib group compared to the sunitinib group (HR 0.60, 95% CI: 0.40-0.89; P = .001). The objective response rate was 55.7% with the nivolumab plus cabozantinib group versus 27.1% with sunitinib (P < .001). The complete response rate was 8% in the nivolumab plus cabozantinib group compared to 4.6% in the sunitinib group. The median time to response was 2.8 months with nivolumab plus cabozantinib and 4.2 months in the sunitinib group, while the median duration of response was 20.2 months and 11.5 months, respectively.

Nearly all patients (about 99% in each group) had an adverse event (AE). Hypertension was the most common side effect, with grade 3 or higher seen in 12.5% in the nivolumab plus cabzantinib group and 13.1% in the sunitinib group. Other grade 3 or higher side effects occurring in at least 10% of patients in any group were hyponatremia, diarrhea, palmar-plantar erythrodysesthesia, hypothyroidism, and fatigue. AEs of any cause leading to discontinuation of the therapy occurred in 19.7% in the nivolumab plus cabzantinib group vs 16.9% of the sunitinib group. One death was considered to be treatment-related (small intestinal perforation) in the nivolumab plus cabozantinib group vs 2 treatment-related deaths with sunitinib (pneumonia and respiratory distress). In the nivolumab plus cabozantinib group, 57% of the patients had a dose reduction of cabozantinib and 52% had a reduction in sunitinib dosage.

Using the Functional Assessment of Cancer Therapy-Kidney Symptoms Index, patients in the nivolumab plus cabozantinib group reported better health-related quality of life and less disease-related symptoms compared to the sunitinib group.

Commentary

The treatment landscape for frontline therapy for patients with advanced RCC has rapidly expanded over the last several years and has revolutionized cancer care. Ushered in by the results from the CheckMate 214 study highlighting the efficacy of dual checkpoint inhibition with nivolumab and ipilimumab in intermediate and poor risk patients, several subsequent trials have demonstrated improved outcomes with combination therapy with immune checkpoint inhibitors and tyrosine-kinase inhibitors (TKI). To date, data from Keynote-426 (pembrolizumab plus axitinib vs sunitinib), Javelin Renal 101 (avelumab plus axitinib vs sunitinib) and the CLEAR trial (lenvatinib plus pembrolizumab vs levatinib plus everolimus vs sunitinib) have demonstrated superiority of immune checkpoint inhibitor/TKI combinations over sunitinb in the first-line setting.^1-5

The current phase 3, CheckMate 9ER trial adds yet another dynamic option for patients with advanced clear cell RCC. While cross-trial comparisons are fraught with important caveats, the median PFS of almost 16.6 months and complete response rate of 8% the nivolumab plus cabozantinib group compares favorably with other combinations. Data from the CLEAR study with the combination of lenvatinib and pembrolizumab showed a complete response rate approaching 16%. Importantly, the current study highlights improved quality of life with the combination of cabozantinib and nivolumab compared to sunitinib alone adding to the efficacy and benefits of this combination treatment.

The selection of first line therapy for patients with advanced RCC should be always guided by individual patient characteristics, and any single immune checkpoint inhibitor/TKI combination is not “superior” to any other. Perhaps more importantly is developing an understanding of the overlapping toxicity profiles of checkpoint inhibitors and TKIs. Again, this trial results are consistent with prior studies in terms of the adverse event profile which were not trivial, and almost all patients (99%) experienced AEs. It is important for oncologists to understand the management of the toxicities with these combinations and dose reductions as appropriate. It is worth noting that 19% of patients with nivolumab plus cabozantinib received glucocorticoids for management of immune-related AEs.

While long-term follow-up data will be needed to further understand the durability of response to this combination, nivolumab-cabozantinib represents an exciting new option for patients with advanced clear cell RCC. As we continue to see improvement in outcomes in clear cell histology, further work must focus on optimization of therapy in non-clear cell RCC as this is a population that is not represented in these data sets. Furthermore, future efforts should begin to explore triplet combinations and biomarker driven patient selection for upfront therapy in ordercontinue to improve outcomes in patients with advanced RCC.

Applications for Clinical Practice

The combination of nivolumab plus cabozantinib adds to the growing list of highly active checkpoint inhibitor/TKI combinations for first-line treatment of advanced RCC. With significant higher response rates, improved outcomes, and improvement in the quality of life, this combination will add another standard treatment option for patients with previously untreated advanced RCC.

When a child presents with café au lait macules, when is genetic testing for neurofibromatosis type 1 (NF1) advised?

According to Peter Kannu, MB, ChB, DCH, PhD, a definitive diagnosis of NF1 can be made in most children using National Institutes of Health criteria published in 1988, which include the presence of two of the following:

• Six or more café au lait macules over 5 mm in diameter in prepubertal individuals and over 15 mm in greatest diameter in postpubertal individuals
• Two or more neurofibromas of any type or one plexiform neurofibroma
• Freckling in the axillary or inguinal regions
• Two or more Lisch nodules
• Optic glioma
• A distinctive osseous lesion such as sphenoid dysplasia or thinning of long bone cortex, with or without pseudarthrosis
• Having a first-degree relative with NF1

For example, in the case of an 8-year-old child who presents with multiple café au lait macules, axillary and inguinal freckling, Lisch nodules, and an optic glioma, “the diagnosis is secure and genetic testing is not going to change clinical management or surveillance,” Dr. Kannu, a clinical geneticist at the University of Alberta, Edmonton, said during the annual meeting of the Society for Pediatric Dermatology. “The only reason for genetic testing in this situation is so that we know the mutation in order to inform reproductive risk counseling in the future.”

However, while a diagnosis of NF1 may be suspected in a 6- to 12-month-old presenting with only café au lait macules, “the diagnosis is not secure because the clinical criteria cannot be met. In this situation, a genetic test can speed up the diagnosis,” he added. “Or, if the test is negative, it can decrease your suspicion for NF1 and you wouldn’t refer the child on to an NF1 screening clinic for intensive surveillance.”

Dr. Kannu based his remarks largely on his 5 years working at the multidisciplinary Genodermatoses Clinic at the Hospital for Sick Children, Toronto. Founded in 2015, the clinic is a “one-stop shop” designed to reduce the wait time for diagnosis and management and the number of hospital visits. The team – composed of a dermatologist, medical geneticist, genetic counselor, residents, and fellows – meets to review the charts of each patient before the appointment, and decides on a preliminary management plan. All children are then seen by one of the trainees in the clinic who devises a differential diagnosis that is presented to staff physicians, at which point genetic testing is decided on. A genetics counselor handles follow-up for those who do have genetic testing.

In 2018, Dr. Kannu and colleagues conducted an informal review of 300 patients who had been seen in the clinic. The mean age at referral was about 6 years, 51% were female, and the top three referral sources were pediatricians (51%), dermatologists (18%), and family physicians (18%). Of the 300 children, 84 (28%) were confirmed to have a diagnosis of NF1. Two patients were diagnosed with NF2 and 5% of the total cohort was diagnosed with mosaic NF1 (MNF1), “which is higher than what you would expect based on the incidence of MNF1 in the literature,” he said.

He separates genetic tests for NF1 into one of two categories: Conventional testing, which is offered by most labs in North America; and comprehensive testing, which is offered by the medical genomics lab at the University of Alabama at Birmingham. Conventional testing focuses on the exons, “the protein coding regions of the gene where most of the mutations lie,” he said. “The test also sequences about 20 base pairs or so of the intron exon boundary and may pick up some intronic mutations. But this test will not detect anything that’s hidden deep in the intronic region.”

Comprehensive testing, meanwhile, checks for mutations in both introns and exons.

Dr. Kannu and colleagues published a case of a paraspinal ganglioneuroma in the proband of a large family with mild cutaneous manifestations of NF1, carrying a deep NF1 intronic mutation. “The clinicians were suspicious that this was NF1, rightly so. The diagnosis was only confirmed after we sent samples to the University of Alabama lab where the deep intronic mutation was found,” he said.

The other situation where conventional genetic testing may be negative is in the case of MNF1, where there “are mutations in some cells but not all cells,” Dr. Kannu explained. “It may only be present in the melanocytes of the skin but not present in the lymphocytes in the blood. Mosaicism is characterized by the regional distribution of pigmentary or other NF1 associated findings. Mosaicism may be detected in the blood if it’s more than 20%. Anything less than that is not detected with conventional genetic testing using DNA from blood and requires extracting DNA from a punch biopsy sample of a café au lait macule.”

The differential diagnosis of café au lait macules includes several conditions associated mutations in the RAS pathway. “Neurofibromin is a key signal of molecules which regulates the activation of RAS,” Dr. Kannu said. “A close binding partner of NF1 is SPRED 1. We know that mutations in this gene cause Legius syndrome, a condition which presents with multiple café au lait macules.”

Two key receptors in the RAS pathway include EGFR and KITL, he continued. Mutations in the EGFR receptor cause a rare condition known as neonatal skin and bowel disease, while mutations in the KITL receptor cause familial progressive hyperpigmentation with or without hypopigmentation. “Looking into the pathway and focusing downstream of RAS, we have genes such as RAF and CBL, which are mutated in Noonan syndrome,” he said. “Further along in the pathway you have mutations in PTEN, which cause Cowden syndrome, and mutations in TSC1 and TSC2, which cause tuberous sclerosis. Mutations in any of these genes can also present with café au lait macules.”

During a question-and-answer session Dr. Kannu was asked to comment about revised diagnostic criteria for NF1 based on an international consensus recommendation, such as changes in the eye that require a formal opthalmologic examination, which were recently published.

“We are understanding more about the phenotype,” he said. “If you fulfill diagnostic criteria for NF1, the main reasons for doing genetic testing are, one, if the family wants to know that information, and two, it informs our reproductive risk counseling. Genotype-phenotype correlations do exist in NF1 but they’re not very robust, so that information is not clinically useful.”

Dr. Kannu disclosed that he has been an advisory board member for Ipsen, Novartis, and Alexion. He has also been a primary investigator for QED and Clementia.

[email protected]

When a child presents with café au lait macules, when is genetic testing for neurofibromatosis type 1 (NF1) advised?

According to Peter Kannu, MB, ChB, DCH, PhD, a definitive diagnosis of NF1 can be made in most children using National Institutes of Health criteria published in 1988, which include the presence of two of the following:

• Six or more café au lait macules over 5 mm in diameter in prepubertal individuals and over 15 mm in greatest diameter in postpubertal individuals
• Two or more neurofibromas of any type or one plexiform neurofibroma
• Freckling in the axillary or inguinal regions
• Two or more Lisch nodules
• Optic glioma
• A distinctive osseous lesion such as sphenoid dysplasia or thinning of long bone cortex, with or without pseudarthrosis
• Having a first-degree relative with NF1

For example, in the case of an 8-year-old child who presents with multiple café au lait macules, axillary and inguinal freckling, Lisch nodules, and an optic glioma, “the diagnosis is secure and genetic testing is not going to change clinical management or surveillance,” Dr. Kannu, a clinical geneticist at the University of Alberta, Edmonton, said during the annual meeting of the Society for Pediatric Dermatology. “The only reason for genetic testing in this situation is so that we know the mutation in order to inform reproductive risk counseling in the future.”

However, while a diagnosis of NF1 may be suspected in a 6- to 12-month-old presenting with only café au lait macules, “the diagnosis is not secure because the clinical criteria cannot be met. In this situation, a genetic test can speed up the diagnosis,” he added. “Or, if the test is negative, it can decrease your suspicion for NF1 and you wouldn’t refer the child on to an NF1 screening clinic for intensive surveillance.”

Dr. Kannu based his remarks largely on his 5 years working at the multidisciplinary Genodermatoses Clinic at the Hospital for Sick Children, Toronto. Founded in 2015, the clinic is a “one-stop shop” designed to reduce the wait time for diagnosis and management and the number of hospital visits. The team – composed of a dermatologist, medical geneticist, genetic counselor, residents, and fellows – meets to review the charts of each patient before the appointment, and decides on a preliminary management plan. All children are then seen by one of the trainees in the clinic who devises a differential diagnosis that is presented to staff physicians, at which point genetic testing is decided on. A genetics counselor handles follow-up for those who do have genetic testing.

In 2018, Dr. Kannu and colleagues conducted an informal review of 300 patients who had been seen in the clinic. The mean age at referral was about 6 years, 51% were female, and the top three referral sources were pediatricians (51%), dermatologists (18%), and family physicians (18%). Of the 300 children, 84 (28%) were confirmed to have a diagnosis of NF1. Two patients were diagnosed with NF2 and 5% of the total cohort was diagnosed with mosaic NF1 (MNF1), “which is higher than what you would expect based on the incidence of MNF1 in the literature,” he said.

He separates genetic tests for NF1 into one of two categories: Conventional testing, which is offered by most labs in North America; and comprehensive testing, which is offered by the medical genomics lab at the University of Alabama at Birmingham. Conventional testing focuses on the exons, “the protein coding regions of the gene where most of the mutations lie,” he said. “The test also sequences about 20 base pairs or so of the intron exon boundary and may pick up some intronic mutations. But this test will not detect anything that’s hidden deep in the intronic region.”

Comprehensive testing, meanwhile, checks for mutations in both introns and exons.

Dr. Kannu and colleagues published a case of a paraspinal ganglioneuroma in the proband of a large family with mild cutaneous manifestations of NF1, carrying a deep NF1 intronic mutation. “The clinicians were suspicious that this was NF1, rightly so. The diagnosis was only confirmed after we sent samples to the University of Alabama lab where the deep intronic mutation was found,” he said.

The other situation where conventional genetic testing may be negative is in the case of MNF1, where there “are mutations in some cells but not all cells,” Dr. Kannu explained. “It may only be present in the melanocytes of the skin but not present in the lymphocytes in the blood. Mosaicism is characterized by the regional distribution of pigmentary or other NF1 associated findings. Mosaicism may be detected in the blood if it’s more than 20%. Anything less than that is not detected with conventional genetic testing using DNA from blood and requires extracting DNA from a punch biopsy sample of a café au lait macule.”

The differential diagnosis of café au lait macules includes several conditions associated mutations in the RAS pathway. “Neurofibromin is a key signal of molecules which regulates the activation of RAS,” Dr. Kannu said. “A close binding partner of NF1 is SPRED 1. We know that mutations in this gene cause Legius syndrome, a condition which presents with multiple café au lait macules.”

Two key receptors in the RAS pathway include EGFR and KITL, he continued. Mutations in the EGFR receptor cause a rare condition known as neonatal skin and bowel disease, while mutations in the KITL receptor cause familial progressive hyperpigmentation with or without hypopigmentation. “Looking into the pathway and focusing downstream of RAS, we have genes such as RAF and CBL, which are mutated in Noonan syndrome,” he said. “Further along in the pathway you have mutations in PTEN, which cause Cowden syndrome, and mutations in TSC1 and TSC2, which cause tuberous sclerosis. Mutations in any of these genes can also present with café au lait macules.”

During a question-and-answer session Dr. Kannu was asked to comment about revised diagnostic criteria for NF1 based on an international consensus recommendation, such as changes in the eye that require a formal opthalmologic examination, which were recently published.

“We are understanding more about the phenotype,” he said. “If you fulfill diagnostic criteria for NF1, the main reasons for doing genetic testing are, one, if the family wants to know that information, and two, it informs our reproductive risk counseling. Genotype-phenotype correlations do exist in NF1 but they’re not very robust, so that information is not clinically useful.”

Dr. Kannu disclosed that he has been an advisory board member for Ipsen, Novartis, and Alexion. He has also been a primary investigator for QED and Clementia.

[email protected]

When a child presents with café au lait macules, when is genetic testing for neurofibromatosis type 1 (NF1) advised?

According to Peter Kannu, MB, ChB, DCH, PhD, a definitive diagnosis of NF1 can be made in most children using National Institutes of Health criteria published in 1988, which include the presence of two of the following:

• Six or more café au lait macules over 5 mm in diameter in prepubertal individuals and over 15 mm in greatest diameter in postpubertal individuals
• Two or more neurofibromas of any type or one plexiform neurofibroma
• Freckling in the axillary or inguinal regions
• Two or more Lisch nodules
• Optic glioma
• A distinctive osseous lesion such as sphenoid dysplasia or thinning of long bone cortex, with or without pseudarthrosis
• Having a first-degree relative with NF1

For example, in the case of an 8-year-old child who presents with multiple café au lait macules, axillary and inguinal freckling, Lisch nodules, and an optic glioma, “the diagnosis is secure and genetic testing is not going to change clinical management or surveillance,” Dr. Kannu, a clinical geneticist at the University of Alberta, Edmonton, said during the annual meeting of the Society for Pediatric Dermatology. “The only reason for genetic testing in this situation is so that we know the mutation in order to inform reproductive risk counseling in the future.”

However, while a diagnosis of NF1 may be suspected in a 6- to 12-month-old presenting with only café au lait macules, “the diagnosis is not secure because the clinical criteria cannot be met. In this situation, a genetic test can speed up the diagnosis,” he added. “Or, if the test is negative, it can decrease your suspicion for NF1 and you wouldn’t refer the child on to an NF1 screening clinic for intensive surveillance.”

Dr. Kannu based his remarks largely on his 5 years working at the multidisciplinary Genodermatoses Clinic at the Hospital for Sick Children, Toronto. Founded in 2015, the clinic is a “one-stop shop” designed to reduce the wait time for diagnosis and management and the number of hospital visits. The team – composed of a dermatologist, medical geneticist, genetic counselor, residents, and fellows – meets to review the charts of each patient before the appointment, and decides on a preliminary management plan. All children are then seen by one of the trainees in the clinic who devises a differential diagnosis that is presented to staff physicians, at which point genetic testing is decided on. A genetics counselor handles follow-up for those who do have genetic testing.

In 2018, Dr. Kannu and colleagues conducted an informal review of 300 patients who had been seen in the clinic. The mean age at referral was about 6 years, 51% were female, and the top three referral sources were pediatricians (51%), dermatologists (18%), and family physicians (18%). Of the 300 children, 84 (28%) were confirmed to have a diagnosis of NF1. Two patients were diagnosed with NF2 and 5% of the total cohort was diagnosed with mosaic NF1 (MNF1), “which is higher than what you would expect based on the incidence of MNF1 in the literature,” he said.

He separates genetic tests for NF1 into one of two categories: Conventional testing, which is offered by most labs in North America; and comprehensive testing, which is offered by the medical genomics lab at the University of Alabama at Birmingham. Conventional testing focuses on the exons, “the protein coding regions of the gene where most of the mutations lie,” he said. “The test also sequences about 20 base pairs or so of the intron exon boundary and may pick up some intronic mutations. But this test will not detect anything that’s hidden deep in the intronic region.”

Comprehensive testing, meanwhile, checks for mutations in both introns and exons.

Dr. Kannu and colleagues published a case of a paraspinal ganglioneuroma in the proband of a large family with mild cutaneous manifestations of NF1, carrying a deep NF1 intronic mutation. “The clinicians were suspicious that this was NF1, rightly so. The diagnosis was only confirmed after we sent samples to the University of Alabama lab where the deep intronic mutation was found,” he said.

The other situation where conventional genetic testing may be negative is in the case of MNF1, where there “are mutations in some cells but not all cells,” Dr. Kannu explained. “It may only be present in the melanocytes of the skin but not present in the lymphocytes in the blood. Mosaicism is characterized by the regional distribution of pigmentary or other NF1 associated findings. Mosaicism may be detected in the blood if it’s more than 20%. Anything less than that is not detected with conventional genetic testing using DNA from blood and requires extracting DNA from a punch biopsy sample of a café au lait macule.”

The differential diagnosis of café au lait macules includes several conditions associated mutations in the RAS pathway. “Neurofibromin is a key signal of molecules which regulates the activation of RAS,” Dr. Kannu said. “A close binding partner of NF1 is SPRED 1. We know that mutations in this gene cause Legius syndrome, a condition which presents with multiple café au lait macules.”

Two key receptors in the RAS pathway include EGFR and KITL, he continued. Mutations in the EGFR receptor cause a rare condition known as neonatal skin and bowel disease, while mutations in the KITL receptor cause familial progressive hyperpigmentation with or without hypopigmentation. “Looking into the pathway and focusing downstream of RAS, we have genes such as RAF and CBL, which are mutated in Noonan syndrome,” he said. “Further along in the pathway you have mutations in PTEN, which cause Cowden syndrome, and mutations in TSC1 and TSC2, which cause tuberous sclerosis. Mutations in any of these genes can also present with café au lait macules.”

During a question-and-answer session Dr. Kannu was asked to comment about revised diagnostic criteria for NF1 based on an international consensus recommendation, such as changes in the eye that require a formal opthalmologic examination, which were recently published.

“We are understanding more about the phenotype,” he said. “If you fulfill diagnostic criteria for NF1, the main reasons for doing genetic testing are, one, if the family wants to know that information, and two, it informs our reproductive risk counseling. Genotype-phenotype correlations do exist in NF1 but they’re not very robust, so that information is not clinically useful.”

Dr. Kannu disclosed that he has been an advisory board member for Ipsen, Novartis, and Alexion. He has also been a primary investigator for QED and Clementia.

[email protected]

Not long ago, physicians considered autoinflammatory diseases in pediatric patients as rare, one-in-a-million types of diagnoses, but with the rapid expansion of genetic testing, pediatric rheumatologists like Dilan Dissanayake, MD, PhD, are finding that these diseases aren’t so rare after all.

“Patients with autoinflammatory diseases are all around us, but many go several years without a diagnosis,” Dr. Dissanayake, a rheumatologist at the Autoinflammatory Disease Clinic at the Hospital for Sick Children, Toronto, said during the annual meeting of the Society for Pediatric Dermatology. “The median time to diagnosis has been estimated to be between 2.5 and 5 years. You can imagine that this type of delay can lead to significant issues, not only with quality of life but also morbidity due to unchecked inflammation that can cause organ damage, and in the most severe cases, can result in an early death.”

Effective treatment options such as biologic medications, however, can prevent these negative sequelae if the disease is recognized early. “Dermatologists are in a unique position because they will often be the first specialist to see these patients and therefore make the diagnosis early on and really alter the lives of these patients,” he said.

While it’s common to classify autoinflammatory diseases by presenting features, such as age of onset, associated symptoms, family history/ethnicity, and triggers/alleviating factors for episodes, Dr. Dissanayake prefers to classify them into one of three groups based on pathophysiology, the first being inflammasomopathies. “When activated, an inflammasome is responsible for processing cytokines from the [interleukin]-1 family from the pro form to the active form,” he explained. As a result, if there is dysregulation and overactivity of the inflammasome, there is excessive production of cytokines like IL-1 beta and IL-18 driving the disease.

Clinical characteristics include fevers and organ involvement, notably abdominal pain, nonvasculitic rashes, uveitis, arthritis, elevated white blood cell count/neutrophils, and highly elevated inflammatory markers. Potential treatments include IL-1 blockers.

The second category of autoinflammatory diseases are the interferonopathies, which are caused by overactivity of the antiviral side of the innate immune system. “For example, if you have overactivity of a sensor for a nucleic acid in your cytosol, the cell misinterprets this as a viral infection and will turn on type 1 interferon production,” said Dr. Dissanayake, who is also an assistant professor of pediatrics at the University of Toronto. “As a result, if you have dysregulation of these pathways, you will get excessive type 1 interferon that contributes to your disease manifestations.” Clinical characteristics include fevers and organ involvement, notably vasculitic rashes, interstitial lung disease, and intracranial calcifications. Inflammatory markers may not be as elevated, and autoantibodies may be present. Janus kinase inhibitors are a potential treatment, he said.

The third category of autoinflammatory diseases are the NF-kappaBopathies, which are caused by overactivity of the NF-kappaB signaling pathway. Clinical characteristics can include fevers with organ involvement that can be highly variable but may include mucocutaneous lesions or granulomatous disease as potential clues. Treatment options depend on the pathway that is involved but tumor necrosis factor blockers often play a role because of the importance of NF-KB in this signaling pathway.

From a skin perspective, most of the rashes Dr. Dissanayake and colleagues see in the rheumatology clinic consist of nonspecific dermohypodermatitis: macules, papules, patches, or plaques. The most common monogenic autoinflammatory disease is Familial Mediterranean Fever syndrome, which “commonly presents as an erysipelas-like rash of the lower extremities, typically below the knee, often over the malleolus,” he said.

Other monogenic autoinflammatory diseases with similar rashes include TNF receptor–associated periodic syndrome, Hyper-IgD syndrome, and systemic juvenile idiopathic arthritis.

Other patients present with urticarial rashes, most commonly cryopyrin-associated periodic syndrome (CAPS). “This is a neutrophilic urticaria, so it tends not to be pruritic and can actually sometimes be tender,” he said. “It also tends not to be as transient as your typical urticaria.” Urticarial rashes can also appear with NLRP12-associated autoinflammatory syndrome (familial cold autoinflammatory syndrome–2), PLCgamma2-associated antibody deficiency and immune dysregulation, and Schnitzler syndrome (monoclonal IgM gammopathy).

Patients can also present with pyogenic or pustular lesions, which can appear with pyoderma gangrenosum–related diseases, such as pyogenic arthritis, pyoderma gangrenosum, arthritis (PAPA) syndrome; pyrin-associated inflammation with neutrophilic dermatosis; deficiency of the IL-1 receptor antagonist; deficiency of IL-36 receptor antagonist; and Majeed syndrome, a mutation in the LPIN2 gene.

The mucocutaneous system can also be affected in autoinflammatory diseases, often presenting with symptoms such as periodic fever, aphthous stomatitis, and pharyngitis. Cervical adenitis syndrome is the most common autoinflammatory disease in childhood and can present with aphthous stomatitis, he said, while Behcet’s disease typically presents with oral and genital ulcers. “More recently, monogenic forms of Behcet’s disease have been described, with haploinsufficiency of A20 and RelA, which are both part of the NF-KB pathway,” he said.

Finally, the presence of vasculitic lesions often suggest interferonopathies such as STING-associated vasculopathy in infancy, proteasome-associated autoinflammatory syndrome and deficiency of adenosine deaminase 2.

Dr. Dissanayake noted that dermatologists should suspect an autoimmune disease if a patient has recurrent fevers, evidence of systemic inflammation on blood work, and if multiple organ systems are involved, especially the lungs, gut, joints, CNS system, and eyes. “Many of these patients have episodic and stereotypical attacks,” he said.

“One of the tools we use in the autoinflammatory clinic is to have patients and families keep a symptom diary where they track the dates of the various symptoms. We can review this during their appointment and try to come up with a diagnosis based on the pattern,” he said.

Since many of these diseases are due to a single gene defect, if there’s any evidence to suggest a monogenic cause, consider an autoinflammatory disease, he added. “If there’s a family history, if there’s consanguinity, or if there’s early age of onset – these may all lead you to think about monogenic autoinflammatory disease.”

During a question-and-answer session, a meeting attendee asked what type of workup he recommends when an autoinflammatory syndrome is suspected. “It partially depends on what organ systems you suspect to be involved,” Dr. Dissanayake said. “As a routine baseline, typically what we would check is CBC and differential, [erythrocyte sedimentation rate] and [C-reactive protein], and we screen for liver transaminases and creatinine to check for liver and kidney issues. A serum albumin will also tell you if the patient is hypoalbuminemic, that there’s been some chronic inflammation and they’re starting to leak the protein out. It’s good to check blood work during the flare and off the flare, to get a sense of the persistence of that inflammation.”

Dr. Dissanayake disclosed that he has received research finding from Gilead Sciences and speaker fees from Novartis.

[email protected]

*This story was updated on 9/20/2021.

Not long ago, physicians considered autoinflammatory diseases in pediatric patients as rare, one-in-a-million types of diagnoses, but with the rapid expansion of genetic testing, pediatric rheumatologists like Dilan Dissanayake, MD, PhD, are finding that these diseases aren’t so rare after all.

“Patients with autoinflammatory diseases are all around us, but many go several years without a diagnosis,” Dr. Dissanayake, a rheumatologist at the Autoinflammatory Disease Clinic at the Hospital for Sick Children, Toronto, said during the annual meeting of the Society for Pediatric Dermatology. “The median time to diagnosis has been estimated to be between 2.5 and 5 years. You can imagine that this type of delay can lead to significant issues, not only with quality of life but also morbidity due to unchecked inflammation that can cause organ damage, and in the most severe cases, can result in an early death.”

Effective treatment options such as biologic medications, however, can prevent these negative sequelae if the disease is recognized early. “Dermatologists are in a unique position because they will often be the first specialist to see these patients and therefore make the diagnosis early on and really alter the lives of these patients,” he said.

While it’s common to classify autoinflammatory diseases by presenting features, such as age of onset, associated symptoms, family history/ethnicity, and triggers/alleviating factors for episodes, Dr. Dissanayake prefers to classify them into one of three groups based on pathophysiology, the first being inflammasomopathies. “When activated, an inflammasome is responsible for processing cytokines from the [interleukin]-1 family from the pro form to the active form,” he explained. As a result, if there is dysregulation and overactivity of the inflammasome, there is excessive production of cytokines like IL-1 beta and IL-18 driving the disease.

Clinical characteristics include fevers and organ involvement, notably abdominal pain, nonvasculitic rashes, uveitis, arthritis, elevated white blood cell count/neutrophils, and highly elevated inflammatory markers. Potential treatments include IL-1 blockers.

The second category of autoinflammatory diseases are the interferonopathies, which are caused by overactivity of the antiviral side of the innate immune system. “For example, if you have overactivity of a sensor for a nucleic acid in your cytosol, the cell misinterprets this as a viral infection and will turn on type 1 interferon production,” said Dr. Dissanayake, who is also an assistant professor of pediatrics at the University of Toronto. “As a result, if you have dysregulation of these pathways, you will get excessive type 1 interferon that contributes to your disease manifestations.” Clinical characteristics include fevers and organ involvement, notably vasculitic rashes, interstitial lung disease, and intracranial calcifications. Inflammatory markers may not be as elevated, and autoantibodies may be present. Janus kinase inhibitors are a potential treatment, he said.

The third category of autoinflammatory diseases are the NF-kappaBopathies, which are caused by overactivity of the NF-kappaB signaling pathway. Clinical characteristics can include fevers with organ involvement that can be highly variable but may include mucocutaneous lesions or granulomatous disease as potential clues. Treatment options depend on the pathway that is involved but tumor necrosis factor blockers often play a role because of the importance of NF-KB in this signaling pathway.

From a skin perspective, most of the rashes Dr. Dissanayake and colleagues see in the rheumatology clinic consist of nonspecific dermohypodermatitis: macules, papules, patches, or plaques. The most common monogenic autoinflammatory disease is Familial Mediterranean Fever syndrome, which “commonly presents as an erysipelas-like rash of the lower extremities, typically below the knee, often over the malleolus,” he said.

Other monogenic autoinflammatory diseases with similar rashes include TNF receptor–associated periodic syndrome, Hyper-IgD syndrome, and systemic juvenile idiopathic arthritis.

Other patients present with urticarial rashes, most commonly cryopyrin-associated periodic syndrome (CAPS). “This is a neutrophilic urticaria, so it tends not to be pruritic and can actually sometimes be tender,” he said. “It also tends not to be as transient as your typical urticaria.” Urticarial rashes can also appear with NLRP12-associated autoinflammatory syndrome (familial cold autoinflammatory syndrome–2), PLCgamma2-associated antibody deficiency and immune dysregulation, and Schnitzler syndrome (monoclonal IgM gammopathy).

Patients can also present with pyogenic or pustular lesions, which can appear with pyoderma gangrenosum–related diseases, such as pyogenic arthritis, pyoderma gangrenosum, arthritis (PAPA) syndrome; pyrin-associated inflammation with neutrophilic dermatosis; deficiency of the IL-1 receptor antagonist; deficiency of IL-36 receptor antagonist; and Majeed syndrome, a mutation in the LPIN2 gene.

The mucocutaneous system can also be affected in autoinflammatory diseases, often presenting with symptoms such as periodic fever, aphthous stomatitis, and pharyngitis. Cervical adenitis syndrome is the most common autoinflammatory disease in childhood and can present with aphthous stomatitis, he said, while Behcet’s disease typically presents with oral and genital ulcers. “More recently, monogenic forms of Behcet’s disease have been described, with haploinsufficiency of A20 and RelA, which are both part of the NF-KB pathway,” he said.

Finally, the presence of vasculitic lesions often suggest interferonopathies such as STING-associated vasculopathy in infancy, proteasome-associated autoinflammatory syndrome and deficiency of adenosine deaminase 2.

Dr. Dissanayake noted that dermatologists should suspect an autoimmune disease if a patient has recurrent fevers, evidence of systemic inflammation on blood work, and if multiple organ systems are involved, especially the lungs, gut, joints, CNS system, and eyes. “Many of these patients have episodic and stereotypical attacks,” he said.

“One of the tools we use in the autoinflammatory clinic is to have patients and families keep a symptom diary where they track the dates of the various symptoms. We can review this during their appointment and try to come up with a diagnosis based on the pattern,” he said.

Since many of these diseases are due to a single gene defect, if there’s any evidence to suggest a monogenic cause, consider an autoinflammatory disease, he added. “If there’s a family history, if there’s consanguinity, or if there’s early age of onset – these may all lead you to think about monogenic autoinflammatory disease.”

During a question-and-answer session, a meeting attendee asked what type of workup he recommends when an autoinflammatory syndrome is suspected. “It partially depends on what organ systems you suspect to be involved,” Dr. Dissanayake said. “As a routine baseline, typically what we would check is CBC and differential, [erythrocyte sedimentation rate] and [C-reactive protein], and we screen for liver transaminases and creatinine to check for liver and kidney issues. A serum albumin will also tell you if the patient is hypoalbuminemic, that there’s been some chronic inflammation and they’re starting to leak the protein out. It’s good to check blood work during the flare and off the flare, to get a sense of the persistence of that inflammation.”

Dr. Dissanayake disclosed that he has received research finding from Gilead Sciences and speaker fees from Novartis.

[email protected]

*This story was updated on 9/20/2021.

Not long ago, physicians considered autoinflammatory diseases in pediatric patients as rare, one-in-a-million types of diagnoses, but with the rapid expansion of genetic testing, pediatric rheumatologists like Dilan Dissanayake, MD, PhD, are finding that these diseases aren’t so rare after all.

“Patients with autoinflammatory diseases are all around us, but many go several years without a diagnosis,” Dr. Dissanayake, a rheumatologist at the Autoinflammatory Disease Clinic at the Hospital for Sick Children, Toronto, said during the annual meeting of the Society for Pediatric Dermatology. “The median time to diagnosis has been estimated to be between 2.5 and 5 years. You can imagine that this type of delay can lead to significant issues, not only with quality of life but also morbidity due to unchecked inflammation that can cause organ damage, and in the most severe cases, can result in an early death.”

Effective treatment options such as biologic medications, however, can prevent these negative sequelae if the disease is recognized early. “Dermatologists are in a unique position because they will often be the first specialist to see these patients and therefore make the diagnosis early on and really alter the lives of these patients,” he said.

While it’s common to classify autoinflammatory diseases by presenting features, such as age of onset, associated symptoms, family history/ethnicity, and triggers/alleviating factors for episodes, Dr. Dissanayake prefers to classify them into one of three groups based on pathophysiology, the first being inflammasomopathies. “When activated, an inflammasome is responsible for processing cytokines from the [interleukin]-1 family from the pro form to the active form,” he explained. As a result, if there is dysregulation and overactivity of the inflammasome, there is excessive production of cytokines like IL-1 beta and IL-18 driving the disease.

Clinical characteristics include fevers and organ involvement, notably abdominal pain, nonvasculitic rashes, uveitis, arthritis, elevated white blood cell count/neutrophils, and highly elevated inflammatory markers. Potential treatments include IL-1 blockers.

The second category of autoinflammatory diseases are the interferonopathies, which are caused by overactivity of the antiviral side of the innate immune system. “For example, if you have overactivity of a sensor for a nucleic acid in your cytosol, the cell misinterprets this as a viral infection and will turn on type 1 interferon production,” said Dr. Dissanayake, who is also an assistant professor of pediatrics at the University of Toronto. “As a result, if you have dysregulation of these pathways, you will get excessive type 1 interferon that contributes to your disease manifestations.” Clinical characteristics include fevers and organ involvement, notably vasculitic rashes, interstitial lung disease, and intracranial calcifications. Inflammatory markers may not be as elevated, and autoantibodies may be present. Janus kinase inhibitors are a potential treatment, he said.

The third category of autoinflammatory diseases are the NF-kappaBopathies, which are caused by overactivity of the NF-kappaB signaling pathway. Clinical characteristics can include fevers with organ involvement that can be highly variable but may include mucocutaneous lesions or granulomatous disease as potential clues. Treatment options depend on the pathway that is involved but tumor necrosis factor blockers often play a role because of the importance of NF-KB in this signaling pathway.

From a skin perspective, most of the rashes Dr. Dissanayake and colleagues see in the rheumatology clinic consist of nonspecific dermohypodermatitis: macules, papules, patches, or plaques. The most common monogenic autoinflammatory disease is Familial Mediterranean Fever syndrome, which “commonly presents as an erysipelas-like rash of the lower extremities, typically below the knee, often over the malleolus,” he said.

Other monogenic autoinflammatory diseases with similar rashes include TNF receptor–associated periodic syndrome, Hyper-IgD syndrome, and systemic juvenile idiopathic arthritis.

Other patients present with urticarial rashes, most commonly cryopyrin-associated periodic syndrome (CAPS). “This is a neutrophilic urticaria, so it tends not to be pruritic and can actually sometimes be tender,” he said. “It also tends not to be as transient as your typical urticaria.” Urticarial rashes can also appear with NLRP12-associated autoinflammatory syndrome (familial cold autoinflammatory syndrome–2), PLCgamma2-associated antibody deficiency and immune dysregulation, and Schnitzler syndrome (monoclonal IgM gammopathy).

Patients can also present with pyogenic or pustular lesions, which can appear with pyoderma gangrenosum–related diseases, such as pyogenic arthritis, pyoderma gangrenosum, arthritis (PAPA) syndrome; pyrin-associated inflammation with neutrophilic dermatosis; deficiency of the IL-1 receptor antagonist; deficiency of IL-36 receptor antagonist; and Majeed syndrome, a mutation in the LPIN2 gene.

The mucocutaneous system can also be affected in autoinflammatory diseases, often presenting with symptoms such as periodic fever, aphthous stomatitis, and pharyngitis. Cervical adenitis syndrome is the most common autoinflammatory disease in childhood and can present with aphthous stomatitis, he said, while Behcet’s disease typically presents with oral and genital ulcers. “More recently, monogenic forms of Behcet’s disease have been described, with haploinsufficiency of A20 and RelA, which are both part of the NF-KB pathway,” he said.

Finally, the presence of vasculitic lesions often suggest interferonopathies such as STING-associated vasculopathy in infancy, proteasome-associated autoinflammatory syndrome and deficiency of adenosine deaminase 2.

Dr. Dissanayake noted that dermatologists should suspect an autoimmune disease if a patient has recurrent fevers, evidence of systemic inflammation on blood work, and if multiple organ systems are involved, especially the lungs, gut, joints, CNS system, and eyes. “Many of these patients have episodic and stereotypical attacks,” he said.

“One of the tools we use in the autoinflammatory clinic is to have patients and families keep a symptom diary where they track the dates of the various symptoms. We can review this during their appointment and try to come up with a diagnosis based on the pattern,” he said.

Since many of these diseases are due to a single gene defect, if there’s any evidence to suggest a monogenic cause, consider an autoinflammatory disease, he added. “If there’s a family history, if there’s consanguinity, or if there’s early age of onset – these may all lead you to think about monogenic autoinflammatory disease.”

During a question-and-answer session, a meeting attendee asked what type of workup he recommends when an autoinflammatory syndrome is suspected. “It partially depends on what organ systems you suspect to be involved,” Dr. Dissanayake said. “As a routine baseline, typically what we would check is CBC and differential, [erythrocyte sedimentation rate] and [C-reactive protein], and we screen for liver transaminases and creatinine to check for liver and kidney issues. A serum albumin will also tell you if the patient is hypoalbuminemic, that there’s been some chronic inflammation and they’re starting to leak the protein out. It’s good to check blood work during the flare and off the flare, to get a sense of the persistence of that inflammation.”

Dr. Dissanayake disclosed that he has received research finding from Gilead Sciences and speaker fees from Novartis.

[email protected]

*This story was updated on 9/20/2021.