CHICAGO – With more than 15 years of follow-up from two related trials, the best conduit for the second most important target vessel in coronary artery bypass grafting (CABG) appears to be resolved.

The radial artery (RA) graft is linked with a lower risk of major adverse cardiac events (MACE) relative to a saphenous vein (SV) or the free right internal thoracic artery (FRITA).

On the basis of these findings, “a radial artery graft should be considered in all isolated CABG operations unless there are contraindications,” reported David L. Hare, MBBS, director of research in the department of cardiology, University of Melbourne.

For the primary graft, there is general agreement that the left internal thoracic artery (LITA) is the first choice for the left anterior descending vessel, but the optimal graft for the second most important target has never been established, according to Dr. Hare.

Almost 25 years ago, two randomized controlled trials called RAPCO-RITA and RAPCO-SV were initiated to address the question. There is now 15 years of follow-up for both of the RAPCO (Radial Artery Patency and Clinical Outcomes) trials, which were presented together at the American Heart Association scientific sessions.
 

Two trials conducted simultaneously

The RAPCO-RITA trial randomized CABG patients less than 70 years of age (less than 60 years in those with diabetes) to grafting of the second target vessel with an RA or FRITA graft. The RAPCO-SV trial randomized those 70 years or older (60 years or older with diabetes) to an RA or SV graft.

The two primary endpoints were graft patency at 10 years and a composite MACE at 10 years. The assessment of the MACE endpoint, which consisted of cardiovascular mortality, acute myocardial infarction, and coronary revascularization, was later amended to include a comparison at 15 years.

Ten-year patency results, favoring the RA in both studies, were previously published in Circulation. In the new data presented at the meeting, the RA was associated with a significant reduction in MACE relative to the comparator graft in both studies.

“The main driver was a reduction in all-cause mortality,” Dr. Hare reported.

In RAPCO-RITA, 394 patients were randomized with follow-up data available for all but 1 patient at 15 years. Similarly, only 1 patient was lost to follow-up among the 225 randomized in RAPCO-SV. In both studies, baseline characteristics were well balanced.

MACE curves separate at 5 years

In RAPCO-RITA, the MACE survival curves began to separate at about 5 years and then gradually widened. By 15 years, the lower rate of MACE in the RA group (38% vs. 48%) translated into a 26% relative reduction (hazard ratio, 0.74; P = .04).

In RAPCO-SV, the pattern was similar, by 15 years, the rates of MACE were 60% and 73% for the RA and SV groups, respectively, translating into a 29% relative reduction (HR, 0.71; P = .04).

There was no heterogeneity in benefit across prespecified subgroups such as presence or absence of diabetes, gender, or age. In RAPCO-RITA, there was 8% absolute and 31% relative reduction in all-cause mortality. In RAPCO-SV, the absolute and relative reductions were 11% and 26%.

When the trial was initiated, Dr. Hare hypothesized that RITA would prove more durable than RA, so the outcome was not anticipated.

“This is the first randomized controlled trial program to address the question,” said Dr. Hare, who noted that there have been numerous retrospective and case control analyses that have produced mixed results in the past.
 

Discussant praises trial quality

The AHA-invited discussant, Marc Ruel, MD, chair of cardiac surgery, University of Ottawa (Ont.) Heart Institute, called these data “important,” and he congratulated Dr. Hare for conducting the first randomized trial to address the question about second graft durability.

However, he noted that, although the study was randomized, it was not blinded, and he questioned whether postoperative care, in particular, was similar. He also pointed out that the MACE rate seemed high, particularly among the older patients randomized in RAPCO-SV.

“All of the patients were referred to an independently run CABG rehab program that was quite separate from the trial but that provided identical mandated care,” Dr. Hare responded, indicating that there was no opportunity for differences in postprocedural management.

In the United States, the SV graft is often preferred on the basis of easy harvesting and handling characteristics, according to Dr. Hare, who estimated that fewer than 10% of the 200,000 CABG procedures performed in the United States employ the RA conduit for second target vessels. He believes the RAPCO trials data support a change.

“My personal view is [that, on the basis of] this data, given that it is from a controlled trial rather than from patient-level meta-analyses, all isolated CABG operations should be using a radial graft if it is suitable,” Dr. Hare said.

Dr. Hare reports financial relationships with Abbott, Amgen, AstraZeneca, Bayer, Boehringer-Ingelheim, CSL-Biotherapies, Lundbeck, Menarini, Merck, Novartis, Pfizer, Regeneron, Sanofi, Servier, and Vifor. Dr. Ruel reports financial relationships with Cryolife, Edwards, and Medtronic.

CHICAGO – With more than 15 years of follow-up from two related trials, the best conduit for the second most important target vessel in coronary artery bypass grafting (CABG) appears to be resolved.

The radial artery (RA) graft is linked with a lower risk of major adverse cardiac events (MACE) relative to a saphenous vein (SV) or the free right internal thoracic artery (FRITA).

On the basis of these findings, “a radial artery graft should be considered in all isolated CABG operations unless there are contraindications,” reported David L. Hare, MBBS, director of research in the department of cardiology, University of Melbourne.

For the primary graft, there is general agreement that the left internal thoracic artery (LITA) is the first choice for the left anterior descending vessel, but the optimal graft for the second most important target has never been established, according to Dr. Hare.

Almost 25 years ago, two randomized controlled trials called RAPCO-RITA and RAPCO-SV were initiated to address the question. There is now 15 years of follow-up for both of the RAPCO (Radial Artery Patency and Clinical Outcomes) trials, which were presented together at the American Heart Association scientific sessions.
 

Two trials conducted simultaneously

The RAPCO-RITA trial randomized CABG patients less than 70 years of age (less than 60 years in those with diabetes) to grafting of the second target vessel with an RA or FRITA graft. The RAPCO-SV trial randomized those 70 years or older (60 years or older with diabetes) to an RA or SV graft.

The two primary endpoints were graft patency at 10 years and a composite MACE at 10 years. The assessment of the MACE endpoint, which consisted of cardiovascular mortality, acute myocardial infarction, and coronary revascularization, was later amended to include a comparison at 15 years.

Ten-year patency results, favoring the RA in both studies, were previously published in Circulation. In the new data presented at the meeting, the RA was associated with a significant reduction in MACE relative to the comparator graft in both studies.

“The main driver was a reduction in all-cause mortality,” Dr. Hare reported.

In RAPCO-RITA, 394 patients were randomized with follow-up data available for all but 1 patient at 15 years. Similarly, only 1 patient was lost to follow-up among the 225 randomized in RAPCO-SV. In both studies, baseline characteristics were well balanced.

MACE curves separate at 5 years

In RAPCO-RITA, the MACE survival curves began to separate at about 5 years and then gradually widened. By 15 years, the lower rate of MACE in the RA group (38% vs. 48%) translated into a 26% relative reduction (hazard ratio, 0.74; P = .04).

In RAPCO-SV, the pattern was similar, by 15 years, the rates of MACE were 60% and 73% for the RA and SV groups, respectively, translating into a 29% relative reduction (HR, 0.71; P = .04).

There was no heterogeneity in benefit across prespecified subgroups such as presence or absence of diabetes, gender, or age. In RAPCO-RITA, there was 8% absolute and 31% relative reduction in all-cause mortality. In RAPCO-SV, the absolute and relative reductions were 11% and 26%.

When the trial was initiated, Dr. Hare hypothesized that RITA would prove more durable than RA, so the outcome was not anticipated.

“This is the first randomized controlled trial program to address the question,” said Dr. Hare, who noted that there have been numerous retrospective and case control analyses that have produced mixed results in the past.
 

Discussant praises trial quality

The AHA-invited discussant, Marc Ruel, MD, chair of cardiac surgery, University of Ottawa (Ont.) Heart Institute, called these data “important,” and he congratulated Dr. Hare for conducting the first randomized trial to address the question about second graft durability.

However, he noted that, although the study was randomized, it was not blinded, and he questioned whether postoperative care, in particular, was similar. He also pointed out that the MACE rate seemed high, particularly among the older patients randomized in RAPCO-SV.

“All of the patients were referred to an independently run CABG rehab program that was quite separate from the trial but that provided identical mandated care,” Dr. Hare responded, indicating that there was no opportunity for differences in postprocedural management.

In the United States, the SV graft is often preferred on the basis of easy harvesting and handling characteristics, according to Dr. Hare, who estimated that fewer than 10% of the 200,000 CABG procedures performed in the United States employ the RA conduit for second target vessels. He believes the RAPCO trials data support a change.

“My personal view is [that, on the basis of] this data, given that it is from a controlled trial rather than from patient-level meta-analyses, all isolated CABG operations should be using a radial graft if it is suitable,” Dr. Hare said.

Dr. Hare reports financial relationships with Abbott, Amgen, AstraZeneca, Bayer, Boehringer-Ingelheim, CSL-Biotherapies, Lundbeck, Menarini, Merck, Novartis, Pfizer, Regeneron, Sanofi, Servier, and Vifor. Dr. Ruel reports financial relationships with Cryolife, Edwards, and Medtronic.

CHICAGO – With more than 15 years of follow-up from two related trials, the best conduit for the second most important target vessel in coronary artery bypass grafting (CABG) appears to be resolved.

The radial artery (RA) graft is linked with a lower risk of major adverse cardiac events (MACE) relative to a saphenous vein (SV) or the free right internal thoracic artery (FRITA).

On the basis of these findings, “a radial artery graft should be considered in all isolated CABG operations unless there are contraindications,” reported David L. Hare, MBBS, director of research in the department of cardiology, University of Melbourne.

For the primary graft, there is general agreement that the left internal thoracic artery (LITA) is the first choice for the left anterior descending vessel, but the optimal graft for the second most important target has never been established, according to Dr. Hare.

Almost 25 years ago, two randomized controlled trials called RAPCO-RITA and RAPCO-SV were initiated to address the question. There is now 15 years of follow-up for both of the RAPCO (Radial Artery Patency and Clinical Outcomes) trials, which were presented together at the American Heart Association scientific sessions.
 

Two trials conducted simultaneously

The RAPCO-RITA trial randomized CABG patients less than 70 years of age (less than 60 years in those with diabetes) to grafting of the second target vessel with an RA or FRITA graft. The RAPCO-SV trial randomized those 70 years or older (60 years or older with diabetes) to an RA or SV graft.

The two primary endpoints were graft patency at 10 years and a composite MACE at 10 years. The assessment of the MACE endpoint, which consisted of cardiovascular mortality, acute myocardial infarction, and coronary revascularization, was later amended to include a comparison at 15 years.

Ten-year patency results, favoring the RA in both studies, were previously published in Circulation. In the new data presented at the meeting, the RA was associated with a significant reduction in MACE relative to the comparator graft in both studies.

“The main driver was a reduction in all-cause mortality,” Dr. Hare reported.

In RAPCO-RITA, 394 patients were randomized with follow-up data available for all but 1 patient at 15 years. Similarly, only 1 patient was lost to follow-up among the 225 randomized in RAPCO-SV. In both studies, baseline characteristics were well balanced.

MACE curves separate at 5 years

In RAPCO-RITA, the MACE survival curves began to separate at about 5 years and then gradually widened. By 15 years, the lower rate of MACE in the RA group (38% vs. 48%) translated into a 26% relative reduction (hazard ratio, 0.74; P = .04).

In RAPCO-SV, the pattern was similar, by 15 years, the rates of MACE were 60% and 73% for the RA and SV groups, respectively, translating into a 29% relative reduction (HR, 0.71; P = .04).

There was no heterogeneity in benefit across prespecified subgroups such as presence or absence of diabetes, gender, or age. In RAPCO-RITA, there was 8% absolute and 31% relative reduction in all-cause mortality. In RAPCO-SV, the absolute and relative reductions were 11% and 26%.

When the trial was initiated, Dr. Hare hypothesized that RITA would prove more durable than RA, so the outcome was not anticipated.

“This is the first randomized controlled trial program to address the question,” said Dr. Hare, who noted that there have been numerous retrospective and case control analyses that have produced mixed results in the past.
 

Discussant praises trial quality

The AHA-invited discussant, Marc Ruel, MD, chair of cardiac surgery, University of Ottawa (Ont.) Heart Institute, called these data “important,” and he congratulated Dr. Hare for conducting the first randomized trial to address the question about second graft durability.

However, he noted that, although the study was randomized, it was not blinded, and he questioned whether postoperative care, in particular, was similar. He also pointed out that the MACE rate seemed high, particularly among the older patients randomized in RAPCO-SV.

“All of the patients were referred to an independently run CABG rehab program that was quite separate from the trial but that provided identical mandated care,” Dr. Hare responded, indicating that there was no opportunity for differences in postprocedural management.

In the United States, the SV graft is often preferred on the basis of easy harvesting and handling characteristics, according to Dr. Hare, who estimated that fewer than 10% of the 200,000 CABG procedures performed in the United States employ the RA conduit for second target vessels. He believes the RAPCO trials data support a change.

“My personal view is [that, on the basis of] this data, given that it is from a controlled trial rather than from patient-level meta-analyses, all isolated CABG operations should be using a radial graft if it is suitable,” Dr. Hare said.

Dr. Hare reports financial relationships with Abbott, Amgen, AstraZeneca, Bayer, Boehringer-Ingelheim, CSL-Biotherapies, Lundbeck, Menarini, Merck, Novartis, Pfizer, Regeneron, Sanofi, Servier, and Vifor. Dr. Ruel reports financial relationships with Cryolife, Edwards, and Medtronic.

In the first transplant of a genetically altered pig heart into a human in January, initial unexpected, prolonged ECG readings apparently did not affect the heart’s function, although the organ suddenly began to fail at day 50.

A study of these ECG changes, scheduled for presentation by Calvin Kagan, MD, and colleagues at the American Heart Association scientific sessions, offers insight into this novel operation.

As widely reported, the patient, 57-year-old David Bennett of Maryland, had end-stage heart disease and was a poor candidate for a ventricular assist device and was ineligible for a human heart, when he consented to be the first human to be transplanted with a pig heart that had a number of genes added or subtracted with the goal, in part, to prevent rejection.

University of Maryland Medical Center

The heart initially performed well after it was transplanted in an operation at the University of Maryland School of Medicine (UMSOM) in Baltimore on Jan. 7, but failed in the second month, and Mr. Bennett died on March 9.

The Food and Drug Administration had granted emergency authorization for the surgery through its expanded access (compassionate use) program, coauthor Muhammad Mohiuddin, MD, said in an interview.

“We have learned a lot and hope we can do more,” said Dr. Mohiuddin, scientific and program director of the cardiac xenotransplantation program at UMSOM.

“Suddenly on day 50, the heart started to get thicker and was not relaxing enough,” explained senior author Timm-Michael Dickfeld, MD, PhD, director of electrophysiology research at UMSOM. A biopsy revealed substantial buildup of interstitial fluid that restricted movement. The fluid was replaced by fibrous tissue, leading to irreversible damage.

Persistent, prolonged ECG parameters

In the heart from a genetically modified pig, three genes associated with antibody-mediated rejection and a gene associated with pig heart tissue growth had been inactivated and six human genes associated with immune acceptance had been added. The donor pig was supplied by Revivicor (Blacksburg, Va.).

The patient’s immunosuppressant therapy included an experimental antirejection medication (Kiniksa Pharmaceuticals; Lexington, Mass.).  

The patient had daily 12-lead ECGs after the transplant.

In prior research using a pig heart transplanted into a pig body, ECG readings showed a short PR interval (50-120 ms), short QRS duration (70-90 ms) and short QT intervals (260-380 ms).

However, in the transplanted xenograft heart, the initial ECG readings showed a longer PR interval of 190 ms, QRS duration of 138 ms, and QT of 538 ms.

Prolonged intrinsic PR intervals remained stable during the postoperative course (210 ms, range 142-246 ms).

QRS duration also remained prolonged (145 ms, range 116-192 ms), but shortened during the postoperative course (days 21-40 vs. 41-60: 148 ms vs. 132 ms; P < .001).

Increased QT persisted (509 ms, range 384-650 ms) with dynamic fluctuations. The shortest QT duration was observed on day 14 (P < .001).

“In a human heart, when those parameters get longer, this can indicate signs of electrical or myocardial disease,” Dr. Dickfeld explained in a press release from the AHA.

“The QRS duration may prolong when, for example, the muscle and the electrical system itself is diseased, and that is why it takes a long time for electricity to travel from cell to cell and travel from one side of the heart to the other,” he said.

“In the human heart, the QT duration is correlated with an increased risk of abnormal heart rhythms,” he noted. “In our patient, it was concerning that the QT measure was prolonged. While we saw some fluctuations, the QT measure remained prolonged during the whole 61 days.”
 

‘Interesting study’

Two experts who were not involved with this research weighed in on the findings for this news organization.

“This very interesting study reinforces the difficulties in xenotransplantation, and the need for more research to be able to safely monitor recipients, as baseline values are unknown,” said Edward Vigmond, PhD.

Dr. Vigmond, from the Electrophysiology and Heart Modeling Institute at the University of Bordeaux in France, published a related study about a model of translation of pig to human electrophysiology.

The ECG is sensitive to the electrical activation pattern of the heart, along with the cellular and tissue electrical properties, he noted.

“Although pigs and humans may be similar in size, there are many differences between them,” Dr. Vigmond observed, including “the extent of the rapid conduction system of the heart, the number of nuclei in the muscle cells, the proteins in the cell membrane which control electrical activity, the orientation of the heart and thorax, and the handling of calcium inside the cell.”

“On top of this,” he continued, “donor hearts are denervated, so they no longer respond to nervous modulation, and circulating compounds in the blood which affect heart function vary between species.

“With all these differences, it is not surprising that the ECG of a pig heart transplanted into a human resembles neither that of a human nor that of a pig,” Dr. Vigmond said.

“It is interesting to note that the humanized-gene-edited porcine heart exhibited abnormal electrical conduction parameters from the outset,” said Mandeep R. Mehra, MD.

“Whether these changes were due to the gene modifications (i.e., already inherent in the pig ECG prior to transplant) or a result of the transplant operation challenges (such as the ischemia reperfusion injury and early immunological interactions) is uncertain and should be clarified,” said Dr. Mehra, of Harvard Medical School and Brigham and Women’s Medicine in Boston.

“Knowledge of these changes is important to determine whether a simple ECG parameter may be useful to identify changes that could indicate developing pathology,” Dr. Mehra added.

“In the older days of human transplantation, we often used ECG parameters such as a change in voltage amplitude to identify signals for rejection,” he continued. “Whether such changes occurred in this case could be another interesting aspect to explore as changes occurred in cardiac performance in response to the physiological and pathological challenges that were encountered in this sentinel case.”

The study authors reported having no outside sources of funding.
 

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

In the first transplant of a genetically altered pig heart into a human in January, initial unexpected, prolonged ECG readings apparently did not affect the heart’s function, although the organ suddenly began to fail at day 50.

A study of these ECG changes, scheduled for presentation by Calvin Kagan, MD, and colleagues at the American Heart Association scientific sessions, offers insight into this novel operation.

As widely reported, the patient, 57-year-old David Bennett of Maryland, had end-stage heart disease and was a poor candidate for a ventricular assist device and was ineligible for a human heart, when he consented to be the first human to be transplanted with a pig heart that had a number of genes added or subtracted with the goal, in part, to prevent rejection.

University of Maryland Medical Center

The heart initially performed well after it was transplanted in an operation at the University of Maryland School of Medicine (UMSOM) in Baltimore on Jan. 7, but failed in the second month, and Mr. Bennett died on March 9.

The Food and Drug Administration had granted emergency authorization for the surgery through its expanded access (compassionate use) program, coauthor Muhammad Mohiuddin, MD, said in an interview.

“We have learned a lot and hope we can do more,” said Dr. Mohiuddin, scientific and program director of the cardiac xenotransplantation program at UMSOM.

“Suddenly on day 50, the heart started to get thicker and was not relaxing enough,” explained senior author Timm-Michael Dickfeld, MD, PhD, director of electrophysiology research at UMSOM. A biopsy revealed substantial buildup of interstitial fluid that restricted movement. The fluid was replaced by fibrous tissue, leading to irreversible damage.

Persistent, prolonged ECG parameters

In the heart from a genetically modified pig, three genes associated with antibody-mediated rejection and a gene associated with pig heart tissue growth had been inactivated and six human genes associated with immune acceptance had been added. The donor pig was supplied by Revivicor (Blacksburg, Va.).

The patient’s immunosuppressant therapy included an experimental antirejection medication (Kiniksa Pharmaceuticals; Lexington, Mass.).  

The patient had daily 12-lead ECGs after the transplant.

In prior research using a pig heart transplanted into a pig body, ECG readings showed a short PR interval (50-120 ms), short QRS duration (70-90 ms) and short QT intervals (260-380 ms).

However, in the transplanted xenograft heart, the initial ECG readings showed a longer PR interval of 190 ms, QRS duration of 138 ms, and QT of 538 ms.

Prolonged intrinsic PR intervals remained stable during the postoperative course (210 ms, range 142-246 ms).

QRS duration also remained prolonged (145 ms, range 116-192 ms), but shortened during the postoperative course (days 21-40 vs. 41-60: 148 ms vs. 132 ms; P < .001).

Increased QT persisted (509 ms, range 384-650 ms) with dynamic fluctuations. The shortest QT duration was observed on day 14 (P < .001).

“In a human heart, when those parameters get longer, this can indicate signs of electrical or myocardial disease,” Dr. Dickfeld explained in a press release from the AHA.

“The QRS duration may prolong when, for example, the muscle and the electrical system itself is diseased, and that is why it takes a long time for electricity to travel from cell to cell and travel from one side of the heart to the other,” he said.

“In the human heart, the QT duration is correlated with an increased risk of abnormal heart rhythms,” he noted. “In our patient, it was concerning that the QT measure was prolonged. While we saw some fluctuations, the QT measure remained prolonged during the whole 61 days.”
 

‘Interesting study’

Two experts who were not involved with this research weighed in on the findings for this news organization.

“This very interesting study reinforces the difficulties in xenotransplantation, and the need for more research to be able to safely monitor recipients, as baseline values are unknown,” said Edward Vigmond, PhD.

Dr. Vigmond, from the Electrophysiology and Heart Modeling Institute at the University of Bordeaux in France, published a related study about a model of translation of pig to human electrophysiology.

The ECG is sensitive to the electrical activation pattern of the heart, along with the cellular and tissue electrical properties, he noted.

“Although pigs and humans may be similar in size, there are many differences between them,” Dr. Vigmond observed, including “the extent of the rapid conduction system of the heart, the number of nuclei in the muscle cells, the proteins in the cell membrane which control electrical activity, the orientation of the heart and thorax, and the handling of calcium inside the cell.”

“On top of this,” he continued, “donor hearts are denervated, so they no longer respond to nervous modulation, and circulating compounds in the blood which affect heart function vary between species.

“With all these differences, it is not surprising that the ECG of a pig heart transplanted into a human resembles neither that of a human nor that of a pig,” Dr. Vigmond said.

“It is interesting to note that the humanized-gene-edited porcine heart exhibited abnormal electrical conduction parameters from the outset,” said Mandeep R. Mehra, MD.

“Whether these changes were due to the gene modifications (i.e., already inherent in the pig ECG prior to transplant) or a result of the transplant operation challenges (such as the ischemia reperfusion injury and early immunological interactions) is uncertain and should be clarified,” said Dr. Mehra, of Harvard Medical School and Brigham and Women’s Medicine in Boston.

“Knowledge of these changes is important to determine whether a simple ECG parameter may be useful to identify changes that could indicate developing pathology,” Dr. Mehra added.

“In the older days of human transplantation, we often used ECG parameters such as a change in voltage amplitude to identify signals for rejection,” he continued. “Whether such changes occurred in this case could be another interesting aspect to explore as changes occurred in cardiac performance in response to the physiological and pathological challenges that were encountered in this sentinel case.”

The study authors reported having no outside sources of funding.
 

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

In the first transplant of a genetically altered pig heart into a human in January, initial unexpected, prolonged ECG readings apparently did not affect the heart’s function, although the organ suddenly began to fail at day 50.

A study of these ECG changes, scheduled for presentation by Calvin Kagan, MD, and colleagues at the American Heart Association scientific sessions, offers insight into this novel operation.

As widely reported, the patient, 57-year-old David Bennett of Maryland, had end-stage heart disease and was a poor candidate for a ventricular assist device and was ineligible for a human heart, when he consented to be the first human to be transplanted with a pig heart that had a number of genes added or subtracted with the goal, in part, to prevent rejection.

University of Maryland Medical Center

The heart initially performed well after it was transplanted in an operation at the University of Maryland School of Medicine (UMSOM) in Baltimore on Jan. 7, but failed in the second month, and Mr. Bennett died on March 9.

The Food and Drug Administration had granted emergency authorization for the surgery through its expanded access (compassionate use) program, coauthor Muhammad Mohiuddin, MD, said in an interview.

“We have learned a lot and hope we can do more,” said Dr. Mohiuddin, scientific and program director of the cardiac xenotransplantation program at UMSOM.

“Suddenly on day 50, the heart started to get thicker and was not relaxing enough,” explained senior author Timm-Michael Dickfeld, MD, PhD, director of electrophysiology research at UMSOM. A biopsy revealed substantial buildup of interstitial fluid that restricted movement. The fluid was replaced by fibrous tissue, leading to irreversible damage.

Persistent, prolonged ECG parameters

In the heart from a genetically modified pig, three genes associated with antibody-mediated rejection and a gene associated with pig heart tissue growth had been inactivated and six human genes associated with immune acceptance had been added. The donor pig was supplied by Revivicor (Blacksburg, Va.).

The patient’s immunosuppressant therapy included an experimental antirejection medication (Kiniksa Pharmaceuticals; Lexington, Mass.).  

The patient had daily 12-lead ECGs after the transplant.

In prior research using a pig heart transplanted into a pig body, ECG readings showed a short PR interval (50-120 ms), short QRS duration (70-90 ms) and short QT intervals (260-380 ms).

However, in the transplanted xenograft heart, the initial ECG readings showed a longer PR interval of 190 ms, QRS duration of 138 ms, and QT of 538 ms.

Prolonged intrinsic PR intervals remained stable during the postoperative course (210 ms, range 142-246 ms).

QRS duration also remained prolonged (145 ms, range 116-192 ms), but shortened during the postoperative course (days 21-40 vs. 41-60: 148 ms vs. 132 ms; P < .001).

Increased QT persisted (509 ms, range 384-650 ms) with dynamic fluctuations. The shortest QT duration was observed on day 14 (P < .001).

“In a human heart, when those parameters get longer, this can indicate signs of electrical or myocardial disease,” Dr. Dickfeld explained in a press release from the AHA.

“The QRS duration may prolong when, for example, the muscle and the electrical system itself is diseased, and that is why it takes a long time for electricity to travel from cell to cell and travel from one side of the heart to the other,” he said.

“In the human heart, the QT duration is correlated with an increased risk of abnormal heart rhythms,” he noted. “In our patient, it was concerning that the QT measure was prolonged. While we saw some fluctuations, the QT measure remained prolonged during the whole 61 days.”
 

‘Interesting study’

Two experts who were not involved with this research weighed in on the findings for this news organization.

“This very interesting study reinforces the difficulties in xenotransplantation, and the need for more research to be able to safely monitor recipients, as baseline values are unknown,” said Edward Vigmond, PhD.

Dr. Vigmond, from the Electrophysiology and Heart Modeling Institute at the University of Bordeaux in France, published a related study about a model of translation of pig to human electrophysiology.

The ECG is sensitive to the electrical activation pattern of the heart, along with the cellular and tissue electrical properties, he noted.

“Although pigs and humans may be similar in size, there are many differences between them,” Dr. Vigmond observed, including “the extent of the rapid conduction system of the heart, the number of nuclei in the muscle cells, the proteins in the cell membrane which control electrical activity, the orientation of the heart and thorax, and the handling of calcium inside the cell.”

“On top of this,” he continued, “donor hearts are denervated, so they no longer respond to nervous modulation, and circulating compounds in the blood which affect heart function vary between species.

“With all these differences, it is not surprising that the ECG of a pig heart transplanted into a human resembles neither that of a human nor that of a pig,” Dr. Vigmond said.

“It is interesting to note that the humanized-gene-edited porcine heart exhibited abnormal electrical conduction parameters from the outset,” said Mandeep R. Mehra, MD.

“Whether these changes were due to the gene modifications (i.e., already inherent in the pig ECG prior to transplant) or a result of the transplant operation challenges (such as the ischemia reperfusion injury and early immunological interactions) is uncertain and should be clarified,” said Dr. Mehra, of Harvard Medical School and Brigham and Women’s Medicine in Boston.

“Knowledge of these changes is important to determine whether a simple ECG parameter may be useful to identify changes that could indicate developing pathology,” Dr. Mehra added.

“In the older days of human transplantation, we often used ECG parameters such as a change in voltage amplitude to identify signals for rejection,” he continued. “Whether such changes occurred in this case could be another interesting aspect to explore as changes occurred in cardiac performance in response to the physiological and pathological challenges that were encountered in this sentinel case.”

The study authors reported having no outside sources of funding.
 

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

ILLUSTRATION: KIMBERLY MARTENS FOR OBG MANAGEMENT

OBG Management Board Member Linda Bradley, MD, recently attended the Global Congress on Hysteroscopy in Malaga, Spain, May 26-27, 2022, organized by the Global Community on Hysteroscopy, and co-authored the article, “Implementation of office hysteroscopy for the evaluation and treatment of intrauterine pathology” in Obstetrics and Gynecology.¹ She is the Director of the Center for Menstrual Disorders, Fibroids and Hysteroscopic Services at Cleveland Clinic in Cleveland, Ohio. OBG Management recently caught up with her to ask about her perspectives on the expanded use of hysteroscopy in obstetrics and gynecology, and her call to “end blind endometrial sampling.”

OBG Management: What are the drawbacks of dilation and curettage?

Linda Bradley, MD: The standard in ObGyn for many years has been our reliance on the blind dilation and curettage (D&C)—it has been the mainstay for evaluation of the endometrial cavity. We know that it has risks, but most importantly, the procedure has low sensitivity for detecting focal pathology. This basic lack of confirmation of lesions makes a diagnosis impossible and patients are challenged in getting adequate treatment, and will not, since they may not know what options they have for the treatment of intrauterine pathology. 

Because it is a “blind procedure,” done without looking, we don’t know the endpoints, such as when is the procedure completed, how do we know we removed all of the lesions? Let’s look at our colleagues, like GI and colorectal physicians. If a patient presents with rectal bleeding, we would perform an exam, followed by either a colonoscopy or sigmoidoscopy. If a patient were vomiting up blood, a gastroenterologist would perform an upper endoscopy, look with a tube to see if there is an ulcer or something else as a source of the bleeding. If a patient were bleeding from the bladder, a urologist would use  a cystoscope for direct inspection. 

Unfortunately for gynecologists, only about 15% to 25% of us will use hysteroscopy as a diagnostic method²—a method that has excellent sensitivity in detecting endocervical disease, intrauterine disease, and proximal tubal pathology. Compared with blind curettage, we can visualize the cavity; we can sample the cavity directly; we can determine what the patient has and determine the proper surgical procedure, medical therapy, or reassurance that a patient may be offered. We often are looking at focal lesions, lesions in the uterine cavity that could be cancer, so we can make a diagnosis. Or we may be looking at small things, like endometrial hyperplasia, endocervical or endometrial polyps, retained products of conception, or fibroids. We can look at uterine pathology as well as anatomic issues and malformations—such as bicornuate or septate uterus. 

I actually say, “My hysteroscope is my stethoscope” because it allows us to evaluate for many things. The beauty of the new office hysteroscopes is that they are miniaturized. Doctors now have the ability to use reusable devices that are as small as 3 millimeters. There are disposable ones that are up to  3.5 to 4 millimeters in size. Gynecologists have the options to choose from reusuable rigid or flexible hysteroscopes or completely disposable devices. So, truly, we now should not have an excuse for evaluating a woman’s anatomy, especially for bleeding. We should no longer rely, as we have for the last century or more, just on blind sampling, because we miss focal lesions. 

OBG Management: When was the hysteroscope first introduced into the field?

Dr. Bradley: The technology employed in hysteroscopy has been around really since the last 150+ years, introduced by Dr. Pantaleoni. We just have not embraced its usefulness in our clinical practice for many years. Today, about 15% to 25% of gynecologists practicing in the United States are performing hysteroscopy in the office.¹

OBG Management: How does using hysteroscopy contribute to better patient outcomes?

Dr. Bradley: We can get a more accurate diagnosis—fewer false-negatives and a high degree of sensitivity in detecting focal lesions. With D&C, much focal pathology can be left behind. In a 2001 study, 105 symptomatic postmenopausal women with bleeding and thickened lining of the uterus greater than  5 mm on ultrasound underwent blind D&C. They found that 80% of the women had intracavitary lesions and 90% had focal lesions. In fact, 87% of the patients with focal lesions still had residual pathology after the blind D&C.³ The D&C procedure missed 58% of polyps, 50% of endometrial hyperplasia, 60% of cases of complex atypical hyperplasia, and even 11% of endometrial cancers. So these numbers are just not very good. Direct inspection of the uterus, with uninterrupted visualization through hysteroscopy, with removal of lesions under direct visualization, should be our goal. 

Blind sampling also poses greater risk for things like perforation. In addition, you not only can miss lesions by just scraping the endometrium, D&C also can leave lesions just floating around in the uterine cavity, with those lesions never retrieved. With office hysteroscopy, the physician can be more successful in treating a condition because once you see what is going on in the uterine cavity, you can say, “Okay, I can fix this with a surgical procedure. What instruments do I need? How much time is it going to take? Is this a straightforward case? Is it more complicated? Do I let an intern do the case? Is this for a more senior resident or fellow?” So I think it helps to direct the next steps for surgical management and even medical management, which also could be what we call “one-stop shopping.” For instance, for directed biopsies for removal of small polyps, for patients that can tolerate the procedure a little longer, the diagnostic hysteroscopy then becomes a management, an operative procedure, that really, for myself, can be done in the office. Removal of larger fibroids, because of fluid management and other concerns, would not be done in the office. Most patients tolerate office procedures, but it also depends on a patient’s weight, and her ability to relax during the procedure. 

The ultimate goal for hysteroscopy is a minimum of diagnosis, meaning in less than 2, 3 minutes, you can look inside the uterus. Our devices are 3 millimeters in size; I tell my patients, it’s the size of “a piece of spaghetti or pasta,” and we will just take a look. If we see a polyp, okay, if your office is not equipped, because then you need a different type of equipment for removal, then take her to the operating room. The patient would be under brief anesthesia and go home an hour or 2 later. So really, for physicians, we just need to embrace the technology to make a diagnosis, just look, and then from there decide what is next.

OBG Management: What techniques do you use to minimize or eliminate patient discomfort during hysteroscopy?...

OBG Management: What techniques do you use to minimize or eliminate patient discomfort during hysteroscopy?

Dr. Bradley: I think first is always be patient-centric. Let patients be prepared for the procedure. We have reading materials; our nurses explain the procedure. In the office, I try to prepare the patient for success. I let her know what is going on. A friend, family member can be with her. We have a nurse that understands the procedure; she explains it well. We have a type of bed that allows the patients’ legs to rest more comfortably in the stirrups—a leg rest kind of stirrup. We use a heating pad. Some patients like to hear music. Some patients like to have aromatherapy. We are quick and efficient, and typically just talk to the patient throughout the procedure. Although some patients don’t like this explanatory, “talkative” approach—they say, “Dr. Bradley, just do the procedure. I don’t want to know you are touching the cervix. I don’t want to know that you’re prepping. Just do it.” 

But I like what we called it when I was growing up: vocal-local (talk to your patient and explain as you proceed). It’s like local anesthesia. For these procedures in the office you usually do not have to use numbing medicine or a paracervical block. Look at the patient’s age, number of years in menopause, whether or not  she has delivered vaginally, and what her cervix looks like. Does she have a sexually transmitted infection or pelvic inflammatory disease? Sometimes we will use misoprostol, my personal preference is oral, but there are data to suggest that vaginal can be of help.⁴ We suggest Motrin, Tylenol an hour or 2 before, and we always want patients to not come in on an empty stomach. There is also the option of primrose oil, a supplement, that patients buy at the drug store in the vitamin section. It’s used for cervical softening. It is taken orally.^5-7

If they want, patients can watch a video—similar to watching childbirth videos when I used to deliver babies. At some point we started putting mirrors where women could see their efforts of pushing a baby out, as it might give them more willpower to push harder. Some people don’t want to look. But the majority of women will do well in this setting. I do have a small number of women that just say, “I can’t do this in the office,” and so in those cases, they can go to the operating room. But the main idea is, even in an operating room, you are not just doing a D&C. You are still going to look inside with a hysteroscope and have a great panoramic view of what is going on, and remove a lesion with an instrument while you watch. Not a process of looking with the hysteroscope, scraping with a curettage, and thinking that you are complete. Targeted removal of focal lesions under continuous visualization is the goal.

OBG Management: Can you describe the goals of the consensus document on ending blind sampling co-created by the European Society of Gynecologic Endoscopy, AAGL, and the Global Community on Hysteroscopy? 

Dr. Bradley: Our goal for this year is to get a systematic review and guidelines paper written that speaks to what we have just talked about. We want to have as many articles about why blind sampling is not beneficial, with too many misses, and now we have new technology available. We want to speak to physicians to solve the conundrum of bleeding, with equivocal ultrasounds, equivocal saline infusion, sonograms, equivocal MRIs—be able to take a look. Let’s come up to speed like our other colleagues in other specialties that “look.” A systematic review guideline document will provide the evidence that blind  D&C is fraught with problems and how often we miss disease and its inherent risk.

We need to, by itself, for most of our patients, abandon D&C because we have too many missed diagnoses. As doctors we have to be lifelong learners. There was no robot back in the day. We were not able to do laparoscopic hysterectomies, there were no MRIs. I remember in our city, there was one CT scan. We just did not have a lot of technology. The half-life of medical knowledge used to be decades—you graduated in the ‘60s, you could be a great gynecologist for the next  30 years because there was not that much going on. When I finished in the mid to late ‘80s, there was no hysteroscopy training. But I have come to see its value, the science  behind it.

So what I say to doctors is, “We learn so many new things, we shouldn’t get stuck in just saying, ‘I didn’t do this when I was in training.’” And if your thought is, “Oh, in my practice, I don’t have that many cases,” you still need to be able to know who in your community can be a resource to your patients. As Maya Angelou says, “When you know better, you should do better.” And that’s where I am now—to be a lifelong learner, and just  do it.

Lastly, patient influence is very important. If patients ask, “How are you going to do the procedure?” it’s a driver for change. By utilizing hysteroscopy in the evaluation of the intrauterine cavity, we have the opportunity to change the face of evaluation and treatment for abnormal uterine bleeding.●

ILLUSTRATION: KIMBERLY MARTENS FOR OBG MANAGEMENT

OBG Management Board Member Linda Bradley, MD, recently attended the Global Congress on Hysteroscopy in Malaga, Spain, May 26-27, 2022, organized by the Global Community on Hysteroscopy, and co-authored the article, “Implementation of office hysteroscopy for the evaluation and treatment of intrauterine pathology” in Obstetrics and Gynecology.¹ She is the Director of the Center for Menstrual Disorders, Fibroids and Hysteroscopic Services at Cleveland Clinic in Cleveland, Ohio. OBG Management recently caught up with her to ask about her perspectives on the expanded use of hysteroscopy in obstetrics and gynecology, and her call to “end blind endometrial sampling.”

OBG Management: What are the drawbacks of dilation and curettage?

Linda Bradley, MD: The standard in ObGyn for many years has been our reliance on the blind dilation and curettage (D&C)—it has been the mainstay for evaluation of the endometrial cavity. We know that it has risks, but most importantly, the procedure has low sensitivity for detecting focal pathology. This basic lack of confirmation of lesions makes a diagnosis impossible and patients are challenged in getting adequate treatment, and will not, since they may not know what options they have for the treatment of intrauterine pathology. 

Because it is a “blind procedure,” done without looking, we don’t know the endpoints, such as when is the procedure completed, how do we know we removed all of the lesions? Let’s look at our colleagues, like GI and colorectal physicians. If a patient presents with rectal bleeding, we would perform an exam, followed by either a colonoscopy or sigmoidoscopy. If a patient were vomiting up blood, a gastroenterologist would perform an upper endoscopy, look with a tube to see if there is an ulcer or something else as a source of the bleeding. If a patient were bleeding from the bladder, a urologist would use  a cystoscope for direct inspection. 

Unfortunately for gynecologists, only about 15% to 25% of us will use hysteroscopy as a diagnostic method²—a method that has excellent sensitivity in detecting endocervical disease, intrauterine disease, and proximal tubal pathology. Compared with blind curettage, we can visualize the cavity; we can sample the cavity directly; we can determine what the patient has and determine the proper surgical procedure, medical therapy, or reassurance that a patient may be offered. We often are looking at focal lesions, lesions in the uterine cavity that could be cancer, so we can make a diagnosis. Or we may be looking at small things, like endometrial hyperplasia, endocervical or endometrial polyps, retained products of conception, or fibroids. We can look at uterine pathology as well as anatomic issues and malformations—such as bicornuate or septate uterus. 

I actually say, “My hysteroscope is my stethoscope” because it allows us to evaluate for many things. The beauty of the new office hysteroscopes is that they are miniaturized. Doctors now have the ability to use reusable devices that are as small as 3 millimeters. There are disposable ones that are up to  3.5 to 4 millimeters in size. Gynecologists have the options to choose from reusuable rigid or flexible hysteroscopes or completely disposable devices. So, truly, we now should not have an excuse for evaluating a woman’s anatomy, especially for bleeding. We should no longer rely, as we have for the last century or more, just on blind sampling, because we miss focal lesions. 

OBG Management: When was the hysteroscope first introduced into the field?

Dr. Bradley: The technology employed in hysteroscopy has been around really since the last 150+ years, introduced by Dr. Pantaleoni. We just have not embraced its usefulness in our clinical practice for many years. Today, about 15% to 25% of gynecologists practicing in the United States are performing hysteroscopy in the office.¹

OBG Management: How does using hysteroscopy contribute to better patient outcomes?

Dr. Bradley: We can get a more accurate diagnosis—fewer false-negatives and a high degree of sensitivity in detecting focal lesions. With D&C, much focal pathology can be left behind. In a 2001 study, 105 symptomatic postmenopausal women with bleeding and thickened lining of the uterus greater than  5 mm on ultrasound underwent blind D&C. They found that 80% of the women had intracavitary lesions and 90% had focal lesions. In fact, 87% of the patients with focal lesions still had residual pathology after the blind D&C.³ The D&C procedure missed 58% of polyps, 50% of endometrial hyperplasia, 60% of cases of complex atypical hyperplasia, and even 11% of endometrial cancers. So these numbers are just not very good. Direct inspection of the uterus, with uninterrupted visualization through hysteroscopy, with removal of lesions under direct visualization, should be our goal. 

Blind sampling also poses greater risk for things like perforation. In addition, you not only can miss lesions by just scraping the endometrium, D&C also can leave lesions just floating around in the uterine cavity, with those lesions never retrieved. With office hysteroscopy, the physician can be more successful in treating a condition because once you see what is going on in the uterine cavity, you can say, “Okay, I can fix this with a surgical procedure. What instruments do I need? How much time is it going to take? Is this a straightforward case? Is it more complicated? Do I let an intern do the case? Is this for a more senior resident or fellow?” So I think it helps to direct the next steps for surgical management and even medical management, which also could be what we call “one-stop shopping.” For instance, for directed biopsies for removal of small polyps, for patients that can tolerate the procedure a little longer, the diagnostic hysteroscopy then becomes a management, an operative procedure, that really, for myself, can be done in the office. Removal of larger fibroids, because of fluid management and other concerns, would not be done in the office. Most patients tolerate office procedures, but it also depends on a patient’s weight, and her ability to relax during the procedure. 

The ultimate goal for hysteroscopy is a minimum of diagnosis, meaning in less than 2, 3 minutes, you can look inside the uterus. Our devices are 3 millimeters in size; I tell my patients, it’s the size of “a piece of spaghetti or pasta,” and we will just take a look. If we see a polyp, okay, if your office is not equipped, because then you need a different type of equipment for removal, then take her to the operating room. The patient would be under brief anesthesia and go home an hour or 2 later. So really, for physicians, we just need to embrace the technology to make a diagnosis, just look, and then from there decide what is next.

OBG Management: What techniques do you use to minimize or eliminate patient discomfort during hysteroscopy?...

OBG Management: What techniques do you use to minimize or eliminate patient discomfort during hysteroscopy?

Dr. Bradley: I think first is always be patient-centric. Let patients be prepared for the procedure. We have reading materials; our nurses explain the procedure. In the office, I try to prepare the patient for success. I let her know what is going on. A friend, family member can be with her. We have a nurse that understands the procedure; she explains it well. We have a type of bed that allows the patients’ legs to rest more comfortably in the stirrups—a leg rest kind of stirrup. We use a heating pad. Some patients like to hear music. Some patients like to have aromatherapy. We are quick and efficient, and typically just talk to the patient throughout the procedure. Although some patients don’t like this explanatory, “talkative” approach—they say, “Dr. Bradley, just do the procedure. I don’t want to know you are touching the cervix. I don’t want to know that you’re prepping. Just do it.” 

But I like what we called it when I was growing up: vocal-local (talk to your patient and explain as you proceed). It’s like local anesthesia. For these procedures in the office you usually do not have to use numbing medicine or a paracervical block. Look at the patient’s age, number of years in menopause, whether or not  she has delivered vaginally, and what her cervix looks like. Does she have a sexually transmitted infection or pelvic inflammatory disease? Sometimes we will use misoprostol, my personal preference is oral, but there are data to suggest that vaginal can be of help.⁴ We suggest Motrin, Tylenol an hour or 2 before, and we always want patients to not come in on an empty stomach. There is also the option of primrose oil, a supplement, that patients buy at the drug store in the vitamin section. It’s used for cervical softening. It is taken orally.^5-7

If they want, patients can watch a video—similar to watching childbirth videos when I used to deliver babies. At some point we started putting mirrors where women could see their efforts of pushing a baby out, as it might give them more willpower to push harder. Some people don’t want to look. But the majority of women will do well in this setting. I do have a small number of women that just say, “I can’t do this in the office,” and so in those cases, they can go to the operating room. But the main idea is, even in an operating room, you are not just doing a D&C. You are still going to look inside with a hysteroscope and have a great panoramic view of what is going on, and remove a lesion with an instrument while you watch. Not a process of looking with the hysteroscope, scraping with a curettage, and thinking that you are complete. Targeted removal of focal lesions under continuous visualization is the goal.

OBG Management: Can you describe the goals of the consensus document on ending blind sampling co-created by the European Society of Gynecologic Endoscopy, AAGL, and the Global Community on Hysteroscopy? 

Dr. Bradley: Our goal for this year is to get a systematic review and guidelines paper written that speaks to what we have just talked about. We want to have as many articles about why blind sampling is not beneficial, with too many misses, and now we have new technology available. We want to speak to physicians to solve the conundrum of bleeding, with equivocal ultrasounds, equivocal saline infusion, sonograms, equivocal MRIs—be able to take a look. Let’s come up to speed like our other colleagues in other specialties that “look.” A systematic review guideline document will provide the evidence that blind  D&C is fraught with problems and how often we miss disease and its inherent risk.

We need to, by itself, for most of our patients, abandon D&C because we have too many missed diagnoses. As doctors we have to be lifelong learners. There was no robot back in the day. We were not able to do laparoscopic hysterectomies, there were no MRIs. I remember in our city, there was one CT scan. We just did not have a lot of technology. The half-life of medical knowledge used to be decades—you graduated in the ‘60s, you could be a great gynecologist for the next  30 years because there was not that much going on. When I finished in the mid to late ‘80s, there was no hysteroscopy training. But I have come to see its value, the science  behind it.

So what I say to doctors is, “We learn so many new things, we shouldn’t get stuck in just saying, ‘I didn’t do this when I was in training.’” And if your thought is, “Oh, in my practice, I don’t have that many cases,” you still need to be able to know who in your community can be a resource to your patients. As Maya Angelou says, “When you know better, you should do better.” And that’s where I am now—to be a lifelong learner, and just  do it.

Lastly, patient influence is very important. If patients ask, “How are you going to do the procedure?” it’s a driver for change. By utilizing hysteroscopy in the evaluation of the intrauterine cavity, we have the opportunity to change the face of evaluation and treatment for abnormal uterine bleeding.●

ILLUSTRATION: KIMBERLY MARTENS FOR OBG MANAGEMENT

OBG Management Board Member Linda Bradley, MD, recently attended the Global Congress on Hysteroscopy in Malaga, Spain, May 26-27, 2022, organized by the Global Community on Hysteroscopy, and co-authored the article, “Implementation of office hysteroscopy for the evaluation and treatment of intrauterine pathology” in Obstetrics and Gynecology.¹ She is the Director of the Center for Menstrual Disorders, Fibroids and Hysteroscopic Services at Cleveland Clinic in Cleveland, Ohio. OBG Management recently caught up with her to ask about her perspectives on the expanded use of hysteroscopy in obstetrics and gynecology, and her call to “end blind endometrial sampling.”

OBG Management: What are the drawbacks of dilation and curettage?

Linda Bradley, MD: The standard in ObGyn for many years has been our reliance on the blind dilation and curettage (D&C)—it has been the mainstay for evaluation of the endometrial cavity. We know that it has risks, but most importantly, the procedure has low sensitivity for detecting focal pathology. This basic lack of confirmation of lesions makes a diagnosis impossible and patients are challenged in getting adequate treatment, and will not, since they may not know what options they have for the treatment of intrauterine pathology. 

Because it is a “blind procedure,” done without looking, we don’t know the endpoints, such as when is the procedure completed, how do we know we removed all of the lesions? Let’s look at our colleagues, like GI and colorectal physicians. If a patient presents with rectal bleeding, we would perform an exam, followed by either a colonoscopy or sigmoidoscopy. If a patient were vomiting up blood, a gastroenterologist would perform an upper endoscopy, look with a tube to see if there is an ulcer or something else as a source of the bleeding. If a patient were bleeding from the bladder, a urologist would use  a cystoscope for direct inspection. 

Unfortunately for gynecologists, only about 15% to 25% of us will use hysteroscopy as a diagnostic method²—a method that has excellent sensitivity in detecting endocervical disease, intrauterine disease, and proximal tubal pathology. Compared with blind curettage, we can visualize the cavity; we can sample the cavity directly; we can determine what the patient has and determine the proper surgical procedure, medical therapy, or reassurance that a patient may be offered. We often are looking at focal lesions, lesions in the uterine cavity that could be cancer, so we can make a diagnosis. Or we may be looking at small things, like endometrial hyperplasia, endocervical or endometrial polyps, retained products of conception, or fibroids. We can look at uterine pathology as well as anatomic issues and malformations—such as bicornuate or septate uterus. 

I actually say, “My hysteroscope is my stethoscope” because it allows us to evaluate for many things. The beauty of the new office hysteroscopes is that they are miniaturized. Doctors now have the ability to use reusable devices that are as small as 3 millimeters. There are disposable ones that are up to  3.5 to 4 millimeters in size. Gynecologists have the options to choose from reusuable rigid or flexible hysteroscopes or completely disposable devices. So, truly, we now should not have an excuse for evaluating a woman’s anatomy, especially for bleeding. We should no longer rely, as we have for the last century or more, just on blind sampling, because we miss focal lesions. 

OBG Management: When was the hysteroscope first introduced into the field?

Dr. Bradley: The technology employed in hysteroscopy has been around really since the last 150+ years, introduced by Dr. Pantaleoni. We just have not embraced its usefulness in our clinical practice for many years. Today, about 15% to 25% of gynecologists practicing in the United States are performing hysteroscopy in the office.¹

OBG Management: How does using hysteroscopy contribute to better patient outcomes?

Dr. Bradley: We can get a more accurate diagnosis—fewer false-negatives and a high degree of sensitivity in detecting focal lesions. With D&C, much focal pathology can be left behind. In a 2001 study, 105 symptomatic postmenopausal women with bleeding and thickened lining of the uterus greater than  5 mm on ultrasound underwent blind D&C. They found that 80% of the women had intracavitary lesions and 90% had focal lesions. In fact, 87% of the patients with focal lesions still had residual pathology after the blind D&C.³ The D&C procedure missed 58% of polyps, 50% of endometrial hyperplasia, 60% of cases of complex atypical hyperplasia, and even 11% of endometrial cancers. So these numbers are just not very good. Direct inspection of the uterus, with uninterrupted visualization through hysteroscopy, with removal of lesions under direct visualization, should be our goal. 

Blind sampling also poses greater risk for things like perforation. In addition, you not only can miss lesions by just scraping the endometrium, D&C also can leave lesions just floating around in the uterine cavity, with those lesions never retrieved. With office hysteroscopy, the physician can be more successful in treating a condition because once you see what is going on in the uterine cavity, you can say, “Okay, I can fix this with a surgical procedure. What instruments do I need? How much time is it going to take? Is this a straightforward case? Is it more complicated? Do I let an intern do the case? Is this for a more senior resident or fellow?” So I think it helps to direct the next steps for surgical management and even medical management, which also could be what we call “one-stop shopping.” For instance, for directed biopsies for removal of small polyps, for patients that can tolerate the procedure a little longer, the diagnostic hysteroscopy then becomes a management, an operative procedure, that really, for myself, can be done in the office. Removal of larger fibroids, because of fluid management and other concerns, would not be done in the office. Most patients tolerate office procedures, but it also depends on a patient’s weight, and her ability to relax during the procedure. 

The ultimate goal for hysteroscopy is a minimum of diagnosis, meaning in less than 2, 3 minutes, you can look inside the uterus. Our devices are 3 millimeters in size; I tell my patients, it’s the size of “a piece of spaghetti or pasta,” and we will just take a look. If we see a polyp, okay, if your office is not equipped, because then you need a different type of equipment for removal, then take her to the operating room. The patient would be under brief anesthesia and go home an hour or 2 later. So really, for physicians, we just need to embrace the technology to make a diagnosis, just look, and then from there decide what is next.

OBG Management: What techniques do you use to minimize or eliminate patient discomfort during hysteroscopy?...

OBG Management: What techniques do you use to minimize or eliminate patient discomfort during hysteroscopy?

Dr. Bradley: I think first is always be patient-centric. Let patients be prepared for the procedure. We have reading materials; our nurses explain the procedure. In the office, I try to prepare the patient for success. I let her know what is going on. A friend, family member can be with her. We have a nurse that understands the procedure; she explains it well. We have a type of bed that allows the patients’ legs to rest more comfortably in the stirrups—a leg rest kind of stirrup. We use a heating pad. Some patients like to hear music. Some patients like to have aromatherapy. We are quick and efficient, and typically just talk to the patient throughout the procedure. Although some patients don’t like this explanatory, “talkative” approach—they say, “Dr. Bradley, just do the procedure. I don’t want to know you are touching the cervix. I don’t want to know that you’re prepping. Just do it.” 

But I like what we called it when I was growing up: vocal-local (talk to your patient and explain as you proceed). It’s like local anesthesia. For these procedures in the office you usually do not have to use numbing medicine or a paracervical block. Look at the patient’s age, number of years in menopause, whether or not  she has delivered vaginally, and what her cervix looks like. Does she have a sexually transmitted infection or pelvic inflammatory disease? Sometimes we will use misoprostol, my personal preference is oral, but there are data to suggest that vaginal can be of help.⁴ We suggest Motrin, Tylenol an hour or 2 before, and we always want patients to not come in on an empty stomach. There is also the option of primrose oil, a supplement, that patients buy at the drug store in the vitamin section. It’s used for cervical softening. It is taken orally.^5-7

If they want, patients can watch a video—similar to watching childbirth videos when I used to deliver babies. At some point we started putting mirrors where women could see their efforts of pushing a baby out, as it might give them more willpower to push harder. Some people don’t want to look. But the majority of women will do well in this setting. I do have a small number of women that just say, “I can’t do this in the office,” and so in those cases, they can go to the operating room. But the main idea is, even in an operating room, you are not just doing a D&C. You are still going to look inside with a hysteroscope and have a great panoramic view of what is going on, and remove a lesion with an instrument while you watch. Not a process of looking with the hysteroscope, scraping with a curettage, and thinking that you are complete. Targeted removal of focal lesions under continuous visualization is the goal.

OBG Management: Can you describe the goals of the consensus document on ending blind sampling co-created by the European Society of Gynecologic Endoscopy, AAGL, and the Global Community on Hysteroscopy? 

Dr. Bradley: Our goal for this year is to get a systematic review and guidelines paper written that speaks to what we have just talked about. We want to have as many articles about why blind sampling is not beneficial, with too many misses, and now we have new technology available. We want to speak to physicians to solve the conundrum of bleeding, with equivocal ultrasounds, equivocal saline infusion, sonograms, equivocal MRIs—be able to take a look. Let’s come up to speed like our other colleagues in other specialties that “look.” A systematic review guideline document will provide the evidence that blind  D&C is fraught with problems and how often we miss disease and its inherent risk.

We need to, by itself, for most of our patients, abandon D&C because we have too many missed diagnoses. As doctors we have to be lifelong learners. There was no robot back in the day. We were not able to do laparoscopic hysterectomies, there were no MRIs. I remember in our city, there was one CT scan. We just did not have a lot of technology. The half-life of medical knowledge used to be decades—you graduated in the ‘60s, you could be a great gynecologist for the next  30 years because there was not that much going on. When I finished in the mid to late ‘80s, there was no hysteroscopy training. But I have come to see its value, the science  behind it.

So what I say to doctors is, “We learn so many new things, we shouldn’t get stuck in just saying, ‘I didn’t do this when I was in training.’” And if your thought is, “Oh, in my practice, I don’t have that many cases,” you still need to be able to know who in your community can be a resource to your patients. As Maya Angelou says, “When you know better, you should do better.” And that’s where I am now—to be a lifelong learner, and just  do it.

Lastly, patient influence is very important. If patients ask, “How are you going to do the procedure?” it’s a driver for change. By utilizing hysteroscopy in the evaluation of the intrauterine cavity, we have the opportunity to change the face of evaluation and treatment for abnormal uterine bleeding.●

There was no difference in major cardiovascular outcomes with the use of two different diuretics – chlorthalidone or hydrochlorothiazide – in the treatment of hypertension in a new large randomized real-world study.

The Diuretic Comparison Project (DCP), which was conducted in more than 13,500 U.S. veterans age 65 years or over, showed almost identical rates of the primary composite endpoint, including myocardial infarction (MI), stroke, noncancer death, hospitalization for acute heart failure, or urgent revascularization, after a median of 2.4 years of follow-up.

There was no difference in any of the individual endpoints or other secondary cardiovascular outcomes.

However, in the subgroup of patients who had a history of MI or stroke (who made up about 10% of the study population), there was a significant reduction in the primary endpoint with chlorthalidone, whereas those without a history of MI or stroke appeared to have an increased risk for primary outcome events while receiving chlorthalidone compared with those receiving hydrochlorothiazide.

The DCP trial was presented at the American Heart Association scientific sessions by Areef Ishani, MD, director of the Minneapolis Primary Care and Specialty Care Integrated Care Community and director of the Veterans Affairs (VA) Midwest Health Care Network.

Asked how to interpret the result for clinical practice, Dr. Ishani said, “I think we can now say that either of these two drugs is appropriate to use for the treatment of hypertension.”

But he added that the decision on what to do with the subgroup of patients with previous MI or stroke was more “challenging.”

“We saw a highly significant benefit in this subgroup, but this was in the context of an overall negative trial,” he noted. “I think this is a discussion with the patients on how they want to hedge their bets. Because these two drugs are so similar, if they wanted to take one or the other because of this subgroup result I think that is a conversation to have, but I think we now need to conduct another trial specifically in this subgroup of patients to see if chlorthalidone really is of benefit in that group.”

Dr. Ishani explained that both chlorthalidone and hydrochlorothiazide have been around for more than 50 years and are considered first-line treatments for hypertension. Early studies suggested better cardiovascular outcomes and 24-hour blood pressure control with chlorthalidone, but recent observational studies have not shown more benefit with chlorthalidone. These studies have suggested that chlorthalidone may be associated with an increase in adverse events, such as hypokalemia, acute kidney injury, and chronic kidney disease.
 

Pragmatic study

The DCP trial was conducted to try to definitively answer this question of whether chlorthalidone is superior to hydrochlorothiazide. The pragmatic study had a “point-of-care” design that allowed participants and health care professionals to know which medication was being prescribed and to administer the medication in a real-world setting.

“Patients can continue with their normal care with their usual care team because we integrated this trial into primary care clinics,” Dr. Ishani said. “We followed participant results using their electronic health record. This study was nonintrusive, cost-effective, and inexpensive. Plus, we were able to recruit a large rural population, which is unusual for large, randomized trials, where we usually rely on big academic medical centers.”

Using VA electronic medical records, the investigators recruited primary care physicians who identified patients older than age 65 years who were receiving hydrochlorothiazide (25 mg or 50 mg) for hypertension. These patients (97% of whom were male) were then randomly assigned to continue receiving hydrochlorothiazide or to switch to an equivalent dose of chlorthalidone. Patients were followed through the electronic medical record as well as Medicare claims and the National Death Index.

Results after a median follow-up of 2.4 years showed no difference in blood pressure control between the two groups.

In terms of clinical events, the primary composite outcome of MI, stroke, noncancer death, hospitalization for acute heart failure, or urgent revascularization occurred in 10.4% of the chlorthalidone group and in 10.0% of the hydrochlorothiazide group (hazard ratio [HR], 1.04; 95% confidence interval [CI], 0.94-1.16; P = .4).

There was no difference in any individual components of the primary endpoint or the secondary outcomes of all-cause mortality, any revascularization, or erectile dysfunction.

In terms of adverse events, chlorthalidone was associated with an increase in hypokalemia (6% vs. 4.4%; HR, 1.38), but there was no difference in hospitalization for acute kidney injury.
 

Benefit in MI, stroke subgroup?

In the subgroup analysis, patients with a history of MI or stroke who were receiving chlorthalidone had a significant 27% reduction in the primary endpoint (HR, 0.73; 95% CI, 0.57-0.94). Conversely, patients without a history of MI or stroke appeared to do worse while taking chlorthalidone (HR, 1.12; 95% CI, 1.00-1.26).

“We were surprised by these results,” Dr. Ishani said. “We expected chlorthalidone to be more effective overall. However, learning about these differences in patients who have a history of cardiovascular disease may affect patient care. It’s best for people to talk with their health care clinicians about which of these medications is better for their individual needs.”

He added: “More research is needed to explore these results further because we don’t know how they may fit into treating the general population.”

Dr. Ishani noted that a limitations of this study was that most patients were receiving the low dose of chlorthalidone, and previous studies that suggested benefits with chlorthalidone used the higher dose.

“But the world has voted – we had 4,000 clinicians involved in this study, and the vast majority are using the low dose of hydrochlorothiazide. And this is a definitively negative study,” he said. “The world has also voted in that 10 times more patients were on hydrochlorothiazide than on chlorthalidone.”

Commenting on the study at an AHA press conference, Biykem Bozkurt, MD, PhD, Baylor College of Medicine, Houston, pointed out that in all of the landmark National Institutes of Health hypertension trials, there was a signal for benefit with chlorthalidone compared with other antihypertensives.

Catherine Hackett/MDedge News

“We’ve always had this concept that chlorthalidone is better,” she said. “But this study shows no difference in major cardiovascular endpoints. There was more hypokalemia with chlorthalidone, but that’s recognizable as chlorthalidone is a more potent diuretic.”

Other limitations of the DCP trial are its open-label design, which could interject some bias; the enduring effects of hydrochlorothiazide – most of these patients were receiving this agent as background therapy; and inability to look at the effectiveness of decongestion of the agents in such a pragmatic study, Dr. Bozkurt noted.

She said she would like to see more analysis in the subgroup of patients with previous MI or stroke. “Does this result mean that chlorthalidone is better for sicker patients or is this result just due to chance?” she asked.

“While this study demonstrates equal effectiveness of these two diuretics in the targeted population, the question of subgroups of patients for which we use a more potent diuretic I think remains unanswered,” she concluded.

Designated discussant of the DCP trial at the late-breaking trial session, Daniel Levy, MD, director of the Framingham Heart Study at the National Heart, Lung, and Blood Institute, reminded attendees that chlorthalidone had shown impressive results in previous important hypertension studies including SHEP and ALLHAT.

He said the current DCP was a pragmatic study addressing a knowledge gap that “would never have been performed by industry.”

Dr. Levy concluded that the results showing no difference in outcomes between the two diuretics were “compelling,” although a few questions remain.

These include a possible bias toward hydrochlorothiazide – patients were selected who were already taking that drug and so would have already had a favorable response to it. In addition, because the trial was conducted in an older male population, he questioned whether the results could be generalized to women and younger patients.

The DCP study was funded by the VA Cooperative Studies Program. Dr. Ishani reported no disclosures.

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

There was no difference in major cardiovascular outcomes with the use of two different diuretics – chlorthalidone or hydrochlorothiazide – in the treatment of hypertension in a new large randomized real-world study.

The Diuretic Comparison Project (DCP), which was conducted in more than 13,500 U.S. veterans age 65 years or over, showed almost identical rates of the primary composite endpoint, including myocardial infarction (MI), stroke, noncancer death, hospitalization for acute heart failure, or urgent revascularization, after a median of 2.4 years of follow-up.

There was no difference in any of the individual endpoints or other secondary cardiovascular outcomes.

However, in the subgroup of patients who had a history of MI or stroke (who made up about 10% of the study population), there was a significant reduction in the primary endpoint with chlorthalidone, whereas those without a history of MI or stroke appeared to have an increased risk for primary outcome events while receiving chlorthalidone compared with those receiving hydrochlorothiazide.

The DCP trial was presented at the American Heart Association scientific sessions by Areef Ishani, MD, director of the Minneapolis Primary Care and Specialty Care Integrated Care Community and director of the Veterans Affairs (VA) Midwest Health Care Network.

Asked how to interpret the result for clinical practice, Dr. Ishani said, “I think we can now say that either of these two drugs is appropriate to use for the treatment of hypertension.”

But he added that the decision on what to do with the subgroup of patients with previous MI or stroke was more “challenging.”

“We saw a highly significant benefit in this subgroup, but this was in the context of an overall negative trial,” he noted. “I think this is a discussion with the patients on how they want to hedge their bets. Because these two drugs are so similar, if they wanted to take one or the other because of this subgroup result I think that is a conversation to have, but I think we now need to conduct another trial specifically in this subgroup of patients to see if chlorthalidone really is of benefit in that group.”

Dr. Ishani explained that both chlorthalidone and hydrochlorothiazide have been around for more than 50 years and are considered first-line treatments for hypertension. Early studies suggested better cardiovascular outcomes and 24-hour blood pressure control with chlorthalidone, but recent observational studies have not shown more benefit with chlorthalidone. These studies have suggested that chlorthalidone may be associated with an increase in adverse events, such as hypokalemia, acute kidney injury, and chronic kidney disease.
 

Pragmatic study

The DCP trial was conducted to try to definitively answer this question of whether chlorthalidone is superior to hydrochlorothiazide. The pragmatic study had a “point-of-care” design that allowed participants and health care professionals to know which medication was being prescribed and to administer the medication in a real-world setting.

“Patients can continue with their normal care with their usual care team because we integrated this trial into primary care clinics,” Dr. Ishani said. “We followed participant results using their electronic health record. This study was nonintrusive, cost-effective, and inexpensive. Plus, we were able to recruit a large rural population, which is unusual for large, randomized trials, where we usually rely on big academic medical centers.”

Using VA electronic medical records, the investigators recruited primary care physicians who identified patients older than age 65 years who were receiving hydrochlorothiazide (25 mg or 50 mg) for hypertension. These patients (97% of whom were male) were then randomly assigned to continue receiving hydrochlorothiazide or to switch to an equivalent dose of chlorthalidone. Patients were followed through the electronic medical record as well as Medicare claims and the National Death Index.

Results after a median follow-up of 2.4 years showed no difference in blood pressure control between the two groups.

In terms of clinical events, the primary composite outcome of MI, stroke, noncancer death, hospitalization for acute heart failure, or urgent revascularization occurred in 10.4% of the chlorthalidone group and in 10.0% of the hydrochlorothiazide group (hazard ratio [HR], 1.04; 95% confidence interval [CI], 0.94-1.16; P = .4).

There was no difference in any individual components of the primary endpoint or the secondary outcomes of all-cause mortality, any revascularization, or erectile dysfunction.

In terms of adverse events, chlorthalidone was associated with an increase in hypokalemia (6% vs. 4.4%; HR, 1.38), but there was no difference in hospitalization for acute kidney injury.
 

Benefit in MI, stroke subgroup?

In the subgroup analysis, patients with a history of MI or stroke who were receiving chlorthalidone had a significant 27% reduction in the primary endpoint (HR, 0.73; 95% CI, 0.57-0.94). Conversely, patients without a history of MI or stroke appeared to do worse while taking chlorthalidone (HR, 1.12; 95% CI, 1.00-1.26).

“We were surprised by these results,” Dr. Ishani said. “We expected chlorthalidone to be more effective overall. However, learning about these differences in patients who have a history of cardiovascular disease may affect patient care. It’s best for people to talk with their health care clinicians about which of these medications is better for their individual needs.”

He added: “More research is needed to explore these results further because we don’t know how they may fit into treating the general population.”

Dr. Ishani noted that a limitations of this study was that most patients were receiving the low dose of chlorthalidone, and previous studies that suggested benefits with chlorthalidone used the higher dose.

“But the world has voted – we had 4,000 clinicians involved in this study, and the vast majority are using the low dose of hydrochlorothiazide. And this is a definitively negative study,” he said. “The world has also voted in that 10 times more patients were on hydrochlorothiazide than on chlorthalidone.”

Commenting on the study at an AHA press conference, Biykem Bozkurt, MD, PhD, Baylor College of Medicine, Houston, pointed out that in all of the landmark National Institutes of Health hypertension trials, there was a signal for benefit with chlorthalidone compared with other antihypertensives.

Catherine Hackett/MDedge News

“We’ve always had this concept that chlorthalidone is better,” she said. “But this study shows no difference in major cardiovascular endpoints. There was more hypokalemia with chlorthalidone, but that’s recognizable as chlorthalidone is a more potent diuretic.”

Other limitations of the DCP trial are its open-label design, which could interject some bias; the enduring effects of hydrochlorothiazide – most of these patients were receiving this agent as background therapy; and inability to look at the effectiveness of decongestion of the agents in such a pragmatic study, Dr. Bozkurt noted.

She said she would like to see more analysis in the subgroup of patients with previous MI or stroke. “Does this result mean that chlorthalidone is better for sicker patients or is this result just due to chance?” she asked.

“While this study demonstrates equal effectiveness of these two diuretics in the targeted population, the question of subgroups of patients for which we use a more potent diuretic I think remains unanswered,” she concluded.

Designated discussant of the DCP trial at the late-breaking trial session, Daniel Levy, MD, director of the Framingham Heart Study at the National Heart, Lung, and Blood Institute, reminded attendees that chlorthalidone had shown impressive results in previous important hypertension studies including SHEP and ALLHAT.

He said the current DCP was a pragmatic study addressing a knowledge gap that “would never have been performed by industry.”

Dr. Levy concluded that the results showing no difference in outcomes between the two diuretics were “compelling,” although a few questions remain.

These include a possible bias toward hydrochlorothiazide – patients were selected who were already taking that drug and so would have already had a favorable response to it. In addition, because the trial was conducted in an older male population, he questioned whether the results could be generalized to women and younger patients.

The DCP study was funded by the VA Cooperative Studies Program. Dr. Ishani reported no disclosures.

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

There was no difference in major cardiovascular outcomes with the use of two different diuretics – chlorthalidone or hydrochlorothiazide – in the treatment of hypertension in a new large randomized real-world study.

The Diuretic Comparison Project (DCP), which was conducted in more than 13,500 U.S. veterans age 65 years or over, showed almost identical rates of the primary composite endpoint, including myocardial infarction (MI), stroke, noncancer death, hospitalization for acute heart failure, or urgent revascularization, after a median of 2.4 years of follow-up.

There was no difference in any of the individual endpoints or other secondary cardiovascular outcomes.

However, in the subgroup of patients who had a history of MI or stroke (who made up about 10% of the study population), there was a significant reduction in the primary endpoint with chlorthalidone, whereas those without a history of MI or stroke appeared to have an increased risk for primary outcome events while receiving chlorthalidone compared with those receiving hydrochlorothiazide.

The DCP trial was presented at the American Heart Association scientific sessions by Areef Ishani, MD, director of the Minneapolis Primary Care and Specialty Care Integrated Care Community and director of the Veterans Affairs (VA) Midwest Health Care Network.

Asked how to interpret the result for clinical practice, Dr. Ishani said, “I think we can now say that either of these two drugs is appropriate to use for the treatment of hypertension.”

But he added that the decision on what to do with the subgroup of patients with previous MI or stroke was more “challenging.”

“We saw a highly significant benefit in this subgroup, but this was in the context of an overall negative trial,” he noted. “I think this is a discussion with the patients on how they want to hedge their bets. Because these two drugs are so similar, if they wanted to take one or the other because of this subgroup result I think that is a conversation to have, but I think we now need to conduct another trial specifically in this subgroup of patients to see if chlorthalidone really is of benefit in that group.”

Dr. Ishani explained that both chlorthalidone and hydrochlorothiazide have been around for more than 50 years and are considered first-line treatments for hypertension. Early studies suggested better cardiovascular outcomes and 24-hour blood pressure control with chlorthalidone, but recent observational studies have not shown more benefit with chlorthalidone. These studies have suggested that chlorthalidone may be associated with an increase in adverse events, such as hypokalemia, acute kidney injury, and chronic kidney disease.
 

Pragmatic study

The DCP trial was conducted to try to definitively answer this question of whether chlorthalidone is superior to hydrochlorothiazide. The pragmatic study had a “point-of-care” design that allowed participants and health care professionals to know which medication was being prescribed and to administer the medication in a real-world setting.

“Patients can continue with their normal care with their usual care team because we integrated this trial into primary care clinics,” Dr. Ishani said. “We followed participant results using their electronic health record. This study was nonintrusive, cost-effective, and inexpensive. Plus, we were able to recruit a large rural population, which is unusual for large, randomized trials, where we usually rely on big academic medical centers.”

Using VA electronic medical records, the investigators recruited primary care physicians who identified patients older than age 65 years who were receiving hydrochlorothiazide (25 mg or 50 mg) for hypertension. These patients (97% of whom were male) were then randomly assigned to continue receiving hydrochlorothiazide or to switch to an equivalent dose of chlorthalidone. Patients were followed through the electronic medical record as well as Medicare claims and the National Death Index.

Results after a median follow-up of 2.4 years showed no difference in blood pressure control between the two groups.

In terms of clinical events, the primary composite outcome of MI, stroke, noncancer death, hospitalization for acute heart failure, or urgent revascularization occurred in 10.4% of the chlorthalidone group and in 10.0% of the hydrochlorothiazide group (hazard ratio [HR], 1.04; 95% confidence interval [CI], 0.94-1.16; P = .4).

There was no difference in any individual components of the primary endpoint or the secondary outcomes of all-cause mortality, any revascularization, or erectile dysfunction.

In terms of adverse events, chlorthalidone was associated with an increase in hypokalemia (6% vs. 4.4%; HR, 1.38), but there was no difference in hospitalization for acute kidney injury.
 

Benefit in MI, stroke subgroup?

In the subgroup analysis, patients with a history of MI or stroke who were receiving chlorthalidone had a significant 27% reduction in the primary endpoint (HR, 0.73; 95% CI, 0.57-0.94). Conversely, patients without a history of MI or stroke appeared to do worse while taking chlorthalidone (HR, 1.12; 95% CI, 1.00-1.26).

“We were surprised by these results,” Dr. Ishani said. “We expected chlorthalidone to be more effective overall. However, learning about these differences in patients who have a history of cardiovascular disease may affect patient care. It’s best for people to talk with their health care clinicians about which of these medications is better for their individual needs.”

He added: “More research is needed to explore these results further because we don’t know how they may fit into treating the general population.”

Dr. Ishani noted that a limitations of this study was that most patients were receiving the low dose of chlorthalidone, and previous studies that suggested benefits with chlorthalidone used the higher dose.

“But the world has voted – we had 4,000 clinicians involved in this study, and the vast majority are using the low dose of hydrochlorothiazide. And this is a definitively negative study,” he said. “The world has also voted in that 10 times more patients were on hydrochlorothiazide than on chlorthalidone.”

Commenting on the study at an AHA press conference, Biykem Bozkurt, MD, PhD, Baylor College of Medicine, Houston, pointed out that in all of the landmark National Institutes of Health hypertension trials, there was a signal for benefit with chlorthalidone compared with other antihypertensives.

Catherine Hackett/MDedge News

“We’ve always had this concept that chlorthalidone is better,” she said. “But this study shows no difference in major cardiovascular endpoints. There was more hypokalemia with chlorthalidone, but that’s recognizable as chlorthalidone is a more potent diuretic.”

Other limitations of the DCP trial are its open-label design, which could interject some bias; the enduring effects of hydrochlorothiazide – most of these patients were receiving this agent as background therapy; and inability to look at the effectiveness of decongestion of the agents in such a pragmatic study, Dr. Bozkurt noted.

She said she would like to see more analysis in the subgroup of patients with previous MI or stroke. “Does this result mean that chlorthalidone is better for sicker patients or is this result just due to chance?” she asked.

“While this study demonstrates equal effectiveness of these two diuretics in the targeted population, the question of subgroups of patients for which we use a more potent diuretic I think remains unanswered,” she concluded.

Designated discussant of the DCP trial at the late-breaking trial session, Daniel Levy, MD, director of the Framingham Heart Study at the National Heart, Lung, and Blood Institute, reminded attendees that chlorthalidone had shown impressive results in previous important hypertension studies including SHEP and ALLHAT.

He said the current DCP was a pragmatic study addressing a knowledge gap that “would never have been performed by industry.”

Dr. Levy concluded that the results showing no difference in outcomes between the two diuretics were “compelling,” although a few questions remain.

These include a possible bias toward hydrochlorothiazide – patients were selected who were already taking that drug and so would have already had a favorable response to it. In addition, because the trial was conducted in an older male population, he questioned whether the results could be generalized to women and younger patients.

The DCP study was funded by the VA Cooperative Studies Program. Dr. Ishani reported no disclosures.

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

CHICAGO – Despite a 25% reduction in triglycerides (TGs) along with similar reductions in very-low-density lipoprotein (VLDL), and remnant cholesterol, a novel agent failed to provide any protection in a multinational trial against a composite endpoint of major adverse cardiovascular events (MACE) in patients with type 2 diabetes.

“Our data further highlight the complexity of lipid mediators of residual risk among patients with insulin resistance who are receiving statin therapy,” reported Aruna Das Pradhan, MD, of Harvard Medical School, Boston, and Queen Mary University, London.

Ted Bosworth/MDedge News

No benefit from fibrates seen in statin era

“We have not seen a significant cardiovascular event reduction with a fibrate in the statin era,” according to Karol Watson, MD, PhD, director of the UCLA Women’s Cardiovascular Health Center, Los Angeles.

Ted Bosworth/MDedge News

Lipid profile improved as predicted

Yet, in regard to an improvement in the lipid profile, pemafibrate performed as predicted. When compared to placebo 4 months into the trial, pemafibrate was associated with median reductions of 26.2% in TGs, 25.8% in VLDL, and 25.6% in remnant cholesterol, which is cholesterol transported in TG-rich lipoproteins after lipolysis and lipoprotein remodeling.

Furthermore, pemafibrate was associated with a median 27.6% reduction relative to placebo in apolipoprotein C-III and a median 4.8% reduction in apolipoprotein E, all of which would be expected to reduce CV risk.

The findings of PROMINENT were published online in the New England Journal of Medicine immediately after their presentation.

The findings of this study do not eliminate any hope for lowering residual CV risk with TG reductions, but they do suggest the relationship with other lipid subfractions is complex, according to Salim S. Virani, MD, PhD, a professor of cardiology at Baylor College of Medicine, Houston.

“I think that the lack of efficacy despite TG lowering may be largely due to a lack of an overall decrease in the apolipoprotein B level,” speculated Dr. Virani, who wrote an editorial that accompanied publication of the PROMINENT results.

He noted that pemafibrate is implicated in converting remnant cholesterol to LDL cholesterol, which might be one reason for a counterproductive effect on CV risk.

“In order for therapies that lower TG levels to be effective, they probably have to have mechanisms to increase clearance of TG-rich remnant lipoprotein cholesterol particles rather than just converting remnant lipoproteins to LDL,” Dr. Virani explained in an attempt to unravel the interplay of these variables.

Although this study enrolled patients “who would be predicted to have the most benefit from a TG-lowering strategy,” Dr. Watson agreed that these results do not necessarily extend to other means of lowering TG. However, it might draw into question the value of pemafibrate and perhaps other drugs in this class for treatment of hypertriglyceridemia. In addition to a lack of CV benefit, treatment was not without risks, including a higher rate of thromboembolism and adverse renal events.

Dr. Das Pradhan reported financial relationships with Denka, Medtelligence, Optum, Novo Nordisk, and Kowa, which provided funding for this trial. Dr. Watson reported financial relationships with Amarin, Amgen, Boehringer-Ingelheim, and Esperion.

CHICAGO – Despite a 25% reduction in triglycerides (TGs) along with similar reductions in very-low-density lipoprotein (VLDL), and remnant cholesterol, a novel agent failed to provide any protection in a multinational trial against a composite endpoint of major adverse cardiovascular events (MACE) in patients with type 2 diabetes.

“Our data further highlight the complexity of lipid mediators of residual risk among patients with insulin resistance who are receiving statin therapy,” reported Aruna Das Pradhan, MD, of Harvard Medical School, Boston, and Queen Mary University, London.

Ted Bosworth/MDedge News

No benefit from fibrates seen in statin era

“We have not seen a significant cardiovascular event reduction with a fibrate in the statin era,” according to Karol Watson, MD, PhD, director of the UCLA Women’s Cardiovascular Health Center, Los Angeles.

Ted Bosworth/MDedge News

Lipid profile improved as predicted

Yet, in regard to an improvement in the lipid profile, pemafibrate performed as predicted. When compared to placebo 4 months into the trial, pemafibrate was associated with median reductions of 26.2% in TGs, 25.8% in VLDL, and 25.6% in remnant cholesterol, which is cholesterol transported in TG-rich lipoproteins after lipolysis and lipoprotein remodeling.

Furthermore, pemafibrate was associated with a median 27.6% reduction relative to placebo in apolipoprotein C-III and a median 4.8% reduction in apolipoprotein E, all of which would be expected to reduce CV risk.

The findings of PROMINENT were published online in the New England Journal of Medicine immediately after their presentation.

The findings of this study do not eliminate any hope for lowering residual CV risk with TG reductions, but they do suggest the relationship with other lipid subfractions is complex, according to Salim S. Virani, MD, PhD, a professor of cardiology at Baylor College of Medicine, Houston.

“I think that the lack of efficacy despite TG lowering may be largely due to a lack of an overall decrease in the apolipoprotein B level,” speculated Dr. Virani, who wrote an editorial that accompanied publication of the PROMINENT results.

He noted that pemafibrate is implicated in converting remnant cholesterol to LDL cholesterol, which might be one reason for a counterproductive effect on CV risk.

“In order for therapies that lower TG levels to be effective, they probably have to have mechanisms to increase clearance of TG-rich remnant lipoprotein cholesterol particles rather than just converting remnant lipoproteins to LDL,” Dr. Virani explained in an attempt to unravel the interplay of these variables.

Although this study enrolled patients “who would be predicted to have the most benefit from a TG-lowering strategy,” Dr. Watson agreed that these results do not necessarily extend to other means of lowering TG. However, it might draw into question the value of pemafibrate and perhaps other drugs in this class for treatment of hypertriglyceridemia. In addition to a lack of CV benefit, treatment was not without risks, including a higher rate of thromboembolism and adverse renal events.

Dr. Das Pradhan reported financial relationships with Denka, Medtelligence, Optum, Novo Nordisk, and Kowa, which provided funding for this trial. Dr. Watson reported financial relationships with Amarin, Amgen, Boehringer-Ingelheim, and Esperion.

CHICAGO – Despite a 25% reduction in triglycerides (TGs) along with similar reductions in very-low-density lipoprotein (VLDL), and remnant cholesterol, a novel agent failed to provide any protection in a multinational trial against a composite endpoint of major adverse cardiovascular events (MACE) in patients with type 2 diabetes.

“Our data further highlight the complexity of lipid mediators of residual risk among patients with insulin resistance who are receiving statin therapy,” reported Aruna Das Pradhan, MD, of Harvard Medical School, Boston, and Queen Mary University, London.

Ted Bosworth/MDedge News

No benefit from fibrates seen in statin era

“We have not seen a significant cardiovascular event reduction with a fibrate in the statin era,” according to Karol Watson, MD, PhD, director of the UCLA Women’s Cardiovascular Health Center, Los Angeles.

Ted Bosworth/MDedge News

Lipid profile improved as predicted

Yet, in regard to an improvement in the lipid profile, pemafibrate performed as predicted. When compared to placebo 4 months into the trial, pemafibrate was associated with median reductions of 26.2% in TGs, 25.8% in VLDL, and 25.6% in remnant cholesterol, which is cholesterol transported in TG-rich lipoproteins after lipolysis and lipoprotein remodeling.

Furthermore, pemafibrate was associated with a median 27.6% reduction relative to placebo in apolipoprotein C-III and a median 4.8% reduction in apolipoprotein E, all of which would be expected to reduce CV risk.

The findings of PROMINENT were published online in the New England Journal of Medicine immediately after their presentation.

The findings of this study do not eliminate any hope for lowering residual CV risk with TG reductions, but they do suggest the relationship with other lipid subfractions is complex, according to Salim S. Virani, MD, PhD, a professor of cardiology at Baylor College of Medicine, Houston.

“I think that the lack of efficacy despite TG lowering may be largely due to a lack of an overall decrease in the apolipoprotein B level,” speculated Dr. Virani, who wrote an editorial that accompanied publication of the PROMINENT results.

He noted that pemafibrate is implicated in converting remnant cholesterol to LDL cholesterol, which might be one reason for a counterproductive effect on CV risk.

“In order for therapies that lower TG levels to be effective, they probably have to have mechanisms to increase clearance of TG-rich remnant lipoprotein cholesterol particles rather than just converting remnant lipoproteins to LDL,” Dr. Virani explained in an attempt to unravel the interplay of these variables.

Although this study enrolled patients “who would be predicted to have the most benefit from a TG-lowering strategy,” Dr. Watson agreed that these results do not necessarily extend to other means of lowering TG. However, it might draw into question the value of pemafibrate and perhaps other drugs in this class for treatment of hypertriglyceridemia. In addition to a lack of CV benefit, treatment was not without risks, including a higher rate of thromboembolism and adverse renal events.

Dr. Das Pradhan reported financial relationships with Denka, Medtelligence, Optum, Novo Nordisk, and Kowa, which provided funding for this trial. Dr. Watson reported financial relationships with Amarin, Amgen, Boehringer-Ingelheim, and Esperion.

When compared with the general population, hairdressers experience an excess risk of contact allergy linked to hair cosmetic ingredients, a systematic review suggests.

“Research has shown that up to 70% of hairdressers suffer from work-related skin damage, mostly hand dermatitis, at some point during their career,” write Wolfgang Uter of Friedrich-Alexander University Erlangen-Nürnberg and coauthors. In general, they write, occupational skin diseases such as hand dermatitis represent up to 35% of reported occupational diseases. The study was published online in Contact Dermatitis.

Wet work and skin contact with detergents and hairdressing chemicals are top risk factors for developing occupational skin disease in this population, according to the researchers.

To further understand the burden of occupational contact allergy in hairdressers, the investigators gathered evidence published since 2000 on contact allergies to hair cosmetic chemicals. They searched the literature for nine substances selected beforehand by experts and stakeholders. The researchers also examined the prevalence of sensitization between hairdressers and other individuals given skin patch tests.
 

Substance by substance

Common potentially sensitizing cosmetic ingredients reported across studies included p-phenylenediamine (PPD), persulfates (mostly ammonium persulfate [APS]), glyceryl thioglycolate (GMTG), and ammonium thioglycolate (ATG).

In a pooled analysis, the overall prevalence of contact allergy to PPD was 4.3% in consecutively patch-tested patients, but in hairdressers specifically, the overall prevalence of contact allergy to this ingredient was 28.6%, reviewers reported.

The pooled prevalence of contact allergy to APS was 5.5% in consumers and 17.2% in hairdressers. In other review studies, contact allergy risks to APS, GMTG, and ATG were also elevated in hairdressers compared with all controls.

The calculated relative risk (RR) of contact allergy to PPD was approximately 5.4 higher for hairdressers, while the RR for ATG sensitization was 3.4 in hairdressers compared with consumers.

Commenting on these findings, James A. Yiannias, MD, professor of dermatology at the Mayo Medical School, Phoenix, told this news organization in an email that many providers and patients are concerned only about hair dye molecules such as PPD and aminophenol, as well as permanent, wave, and straightening chemicals such as GMTG.

“Although these are common allergens in hairdressers, allergens such as fragrances and some preservatives found in daily hair care products such as shampoos, conditioners, and hair sprays are also common causes of contact dermatitis,” said Dr. Yiannias, who wasn’t involved in the research.

Consequences of exposure

Dr. Yiannias explained that progressive worsening of the dermatitis can occur with ongoing allergen exposure and, if not properly mitigated, can lead to bigger issues. “Initial nuisances of mild irritation and hyperkeratosis can evolve to a state of fissuring with the risk of bleeding and significant pain,” he said.

But once severe and untreated dermatitis occurs, Dr. Yiannias said that hairdressers “may need to change careers” or at least face short- or long-term unemployment.

The researchers suggest reducing exposure to the allergen is key for prevention of symptoms, adding that adequate guidance on the safe use of new products is needed. Also, the researchers suggested that vocational schools should more rigorously implement education for hairdressers that addresses how to protect the skin appropriately at work.

“Hairdressers are taught during their training to be cautious about allergen exposure by avoiding touching high-risk ingredients such as hair dyes,” Dr. Yiannias added. “However, in practice, this is very difficult since the wearing of gloves can impair the tactile sensations that hairdressers often feel is essential in performing their job.”

The study received no industry funding. Dr. Yiannias reports no relevant financial relationships.

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

When compared with the general population, hairdressers experience an excess risk of contact allergy linked to hair cosmetic ingredients, a systematic review suggests.

“Research has shown that up to 70% of hairdressers suffer from work-related skin damage, mostly hand dermatitis, at some point during their career,” write Wolfgang Uter of Friedrich-Alexander University Erlangen-Nürnberg and coauthors. In general, they write, occupational skin diseases such as hand dermatitis represent up to 35% of reported occupational diseases. The study was published online in Contact Dermatitis.

Wet work and skin contact with detergents and hairdressing chemicals are top risk factors for developing occupational skin disease in this population, according to the researchers.

To further understand the burden of occupational contact allergy in hairdressers, the investigators gathered evidence published since 2000 on contact allergies to hair cosmetic chemicals. They searched the literature for nine substances selected beforehand by experts and stakeholders. The researchers also examined the prevalence of sensitization between hairdressers and other individuals given skin patch tests.
 

Substance by substance

Common potentially sensitizing cosmetic ingredients reported across studies included p-phenylenediamine (PPD), persulfates (mostly ammonium persulfate [APS]), glyceryl thioglycolate (GMTG), and ammonium thioglycolate (ATG).

In a pooled analysis, the overall prevalence of contact allergy to PPD was 4.3% in consecutively patch-tested patients, but in hairdressers specifically, the overall prevalence of contact allergy to this ingredient was 28.6%, reviewers reported.

The pooled prevalence of contact allergy to APS was 5.5% in consumers and 17.2% in hairdressers. In other review studies, contact allergy risks to APS, GMTG, and ATG were also elevated in hairdressers compared with all controls.

The calculated relative risk (RR) of contact allergy to PPD was approximately 5.4 higher for hairdressers, while the RR for ATG sensitization was 3.4 in hairdressers compared with consumers.

Commenting on these findings, James A. Yiannias, MD, professor of dermatology at the Mayo Medical School, Phoenix, told this news organization in an email that many providers and patients are concerned only about hair dye molecules such as PPD and aminophenol, as well as permanent, wave, and straightening chemicals such as GMTG.

“Although these are common allergens in hairdressers, allergens such as fragrances and some preservatives found in daily hair care products such as shampoos, conditioners, and hair sprays are also common causes of contact dermatitis,” said Dr. Yiannias, who wasn’t involved in the research.

Consequences of exposure

Dr. Yiannias explained that progressive worsening of the dermatitis can occur with ongoing allergen exposure and, if not properly mitigated, can lead to bigger issues. “Initial nuisances of mild irritation and hyperkeratosis can evolve to a state of fissuring with the risk of bleeding and significant pain,” he said.

But once severe and untreated dermatitis occurs, Dr. Yiannias said that hairdressers “may need to change careers” or at least face short- or long-term unemployment.

The researchers suggest reducing exposure to the allergen is key for prevention of symptoms, adding that adequate guidance on the safe use of new products is needed. Also, the researchers suggested that vocational schools should more rigorously implement education for hairdressers that addresses how to protect the skin appropriately at work.

“Hairdressers are taught during their training to be cautious about allergen exposure by avoiding touching high-risk ingredients such as hair dyes,” Dr. Yiannias added. “However, in practice, this is very difficult since the wearing of gloves can impair the tactile sensations that hairdressers often feel is essential in performing their job.”

The study received no industry funding. Dr. Yiannias reports no relevant financial relationships.

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

When compared with the general population, hairdressers experience an excess risk of contact allergy linked to hair cosmetic ingredients, a systematic review suggests.

“Research has shown that up to 70% of hairdressers suffer from work-related skin damage, mostly hand dermatitis, at some point during their career,” write Wolfgang Uter of Friedrich-Alexander University Erlangen-Nürnberg and coauthors. In general, they write, occupational skin diseases such as hand dermatitis represent up to 35% of reported occupational diseases. The study was published online in Contact Dermatitis.

Wet work and skin contact with detergents and hairdressing chemicals are top risk factors for developing occupational skin disease in this population, according to the researchers.

To further understand the burden of occupational contact allergy in hairdressers, the investigators gathered evidence published since 2000 on contact allergies to hair cosmetic chemicals. They searched the literature for nine substances selected beforehand by experts and stakeholders. The researchers also examined the prevalence of sensitization between hairdressers and other individuals given skin patch tests.
 

Substance by substance

Common potentially sensitizing cosmetic ingredients reported across studies included p-phenylenediamine (PPD), persulfates (mostly ammonium persulfate [APS]), glyceryl thioglycolate (GMTG), and ammonium thioglycolate (ATG).

In a pooled analysis, the overall prevalence of contact allergy to PPD was 4.3% in consecutively patch-tested patients, but in hairdressers specifically, the overall prevalence of contact allergy to this ingredient was 28.6%, reviewers reported.

The pooled prevalence of contact allergy to APS was 5.5% in consumers and 17.2% in hairdressers. In other review studies, contact allergy risks to APS, GMTG, and ATG were also elevated in hairdressers compared with all controls.

The calculated relative risk (RR) of contact allergy to PPD was approximately 5.4 higher for hairdressers, while the RR for ATG sensitization was 3.4 in hairdressers compared with consumers.

Commenting on these findings, James A. Yiannias, MD, professor of dermatology at the Mayo Medical School, Phoenix, told this news organization in an email that many providers and patients are concerned only about hair dye molecules such as PPD and aminophenol, as well as permanent, wave, and straightening chemicals such as GMTG.

“Although these are common allergens in hairdressers, allergens such as fragrances and some preservatives found in daily hair care products such as shampoos, conditioners, and hair sprays are also common causes of contact dermatitis,” said Dr. Yiannias, who wasn’t involved in the research.

Consequences of exposure

Dr. Yiannias explained that progressive worsening of the dermatitis can occur with ongoing allergen exposure and, if not properly mitigated, can lead to bigger issues. “Initial nuisances of mild irritation and hyperkeratosis can evolve to a state of fissuring with the risk of bleeding and significant pain,” he said.

But once severe and untreated dermatitis occurs, Dr. Yiannias said that hairdressers “may need to change careers” or at least face short- or long-term unemployment.

The researchers suggest reducing exposure to the allergen is key for prevention of symptoms, adding that adequate guidance on the safe use of new products is needed. Also, the researchers suggested that vocational schools should more rigorously implement education for hairdressers that addresses how to protect the skin appropriately at work.

“Hairdressers are taught during their training to be cautious about allergen exposure by avoiding touching high-risk ingredients such as hair dyes,” Dr. Yiannias added. “However, in practice, this is very difficult since the wearing of gloves can impair the tactile sensations that hairdressers often feel is essential in performing their job.”

The study received no industry funding. Dr. Yiannias reports no relevant financial relationships.

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

I suspect that you have heard about or maybe read the recent Associated Press story reporting that four daycare workers in Hamilton, Miss., have been charged with felony child abuse for intentionally scaring the children “who didn’t clean up or act good” by wearing a Halloween mask and yelling in their faces. I can have some sympathy for those among us who choose to spend their days tending a flock of sometimes unruly and mischievous toddlers and preschoolers. But, I think one would be hard pressed to find very many adults who would condone the strategy of these misguided daycare providers. Not surprisingly, the parents of some of these children describe their children as traumatized and having disordered sleep.

The news report of this incident in Mississippi doesn’t tell us if these daycare providers had used this tactic in the past. One wonders whether they had found less dramatic verbal threats just weren’t as effective as they had hoped and so decided to go all out.

How effective is fear in changing behavior? Certainly, we have all experienced situations in which a frightening experience has caused us to avoid places, people, and activities. But, is a fear-focused strategy one that health care providers should include in their quiver as we try to mold patient behavior? As luck would have it, 2 weeks before this news story broke I encountered a global study from 84 countries that sought to answer this question (Affect Sci. 2022 Sep. doi: 10.1007/s42761-022-00128-3).

Using the WHO four-point advice about COVID prevention (stay home/avoid shops/use face covering/isolate if exposed) as a model the researchers around the world reviewed the responses of 16,000 individuals. They found that there was no difference in the effectiveness of the message whether it was framed as a negative (“you have so much to lose”) or a positive (“you have so much to gain”). However, investigators observed that the negatively framed presentations generated significantly more anxiety in the respondents. The authors of the paper conclude that if there is no significant difference in the effectiveness, why would we chose a negatively framed presentation that is likely to generate anxiety that we know is associated with increased morbidity and mortality. From a purely public health perspective, it doesn’t make sense and is counterproductive.

I guess if we look back to the old carrot and stick metaphor we shouldn’t be surprised by the findings in this paper. If one’s only goal is to get a group of young preschoolers to behave by scaring the b’geezes out of them with a mask or a threat of bodily punishment, then go for it. Scare tactics will probably work just as well as offering a well-chosen reward system. However, the devil is in the side effects. It’s the same argument that I give to parents who argue that spanking works. Of course it does, but it has a narrow margin for safety and can set up ripples of negative side effects that can destroy healthy parent-child relationships.

The bottom line of this story is the sad truth that somewhere along the line someone failed to effectively train these four daycare workers. But, do we as health care providers need to rethink our training? Have we forgotten our commitment to “First do no harm?” As we craft our messaging have we thought enough about the potential side effects of our attempts at scaring the public into following our suggestions?

Dr. Wilkoff practiced primary care pediatrics in Brunswick, Maine, for nearly 40 years. He has authored several books on behavioral pediatrics, including “How to Say No to Your Toddler.” Other than a Littman stethoscope he accepted as a first-year medical student in 1966, Dr. Wilkoff reports having nothing to disclose. Email him at [email protected].

I suspect that you have heard about or maybe read the recent Associated Press story reporting that four daycare workers in Hamilton, Miss., have been charged with felony child abuse for intentionally scaring the children “who didn’t clean up or act good” by wearing a Halloween mask and yelling in their faces. I can have some sympathy for those among us who choose to spend their days tending a flock of sometimes unruly and mischievous toddlers and preschoolers. But, I think one would be hard pressed to find very many adults who would condone the strategy of these misguided daycare providers. Not surprisingly, the parents of some of these children describe their children as traumatized and having disordered sleep.

The news report of this incident in Mississippi doesn’t tell us if these daycare providers had used this tactic in the past. One wonders whether they had found less dramatic verbal threats just weren’t as effective as they had hoped and so decided to go all out.

How effective is fear in changing behavior? Certainly, we have all experienced situations in which a frightening experience has caused us to avoid places, people, and activities. But, is a fear-focused strategy one that health care providers should include in their quiver as we try to mold patient behavior? As luck would have it, 2 weeks before this news story broke I encountered a global study from 84 countries that sought to answer this question (Affect Sci. 2022 Sep. doi: 10.1007/s42761-022-00128-3).

Using the WHO four-point advice about COVID prevention (stay home/avoid shops/use face covering/isolate if exposed) as a model the researchers around the world reviewed the responses of 16,000 individuals. They found that there was no difference in the effectiveness of the message whether it was framed as a negative (“you have so much to lose”) or a positive (“you have so much to gain”). However, investigators observed that the negatively framed presentations generated significantly more anxiety in the respondents. The authors of the paper conclude that if there is no significant difference in the effectiveness, why would we chose a negatively framed presentation that is likely to generate anxiety that we know is associated with increased morbidity and mortality. From a purely public health perspective, it doesn’t make sense and is counterproductive.

I guess if we look back to the old carrot and stick metaphor we shouldn’t be surprised by the findings in this paper. If one’s only goal is to get a group of young preschoolers to behave by scaring the b’geezes out of them with a mask or a threat of bodily punishment, then go for it. Scare tactics will probably work just as well as offering a well-chosen reward system. However, the devil is in the side effects. It’s the same argument that I give to parents who argue that spanking works. Of course it does, but it has a narrow margin for safety and can set up ripples of negative side effects that can destroy healthy parent-child relationships.

The bottom line of this story is the sad truth that somewhere along the line someone failed to effectively train these four daycare workers. But, do we as health care providers need to rethink our training? Have we forgotten our commitment to “First do no harm?” As we craft our messaging have we thought enough about the potential side effects of our attempts at scaring the public into following our suggestions?

Dr. Wilkoff practiced primary care pediatrics in Brunswick, Maine, for nearly 40 years. He has authored several books on behavioral pediatrics, including “How to Say No to Your Toddler.” Other than a Littman stethoscope he accepted as a first-year medical student in 1966, Dr. Wilkoff reports having nothing to disclose. Email him at [email protected].

I suspect that you have heard about or maybe read the recent Associated Press story reporting that four daycare workers in Hamilton, Miss., have been charged with felony child abuse for intentionally scaring the children “who didn’t clean up or act good” by wearing a Halloween mask and yelling in their faces. I can have some sympathy for those among us who choose to spend their days tending a flock of sometimes unruly and mischievous toddlers and preschoolers. But, I think one would be hard pressed to find very many adults who would condone the strategy of these misguided daycare providers. Not surprisingly, the parents of some of these children describe their children as traumatized and having disordered sleep.

The news report of this incident in Mississippi doesn’t tell us if these daycare providers had used this tactic in the past. One wonders whether they had found less dramatic verbal threats just weren’t as effective as they had hoped and so decided to go all out.

How effective is fear in changing behavior? Certainly, we have all experienced situations in which a frightening experience has caused us to avoid places, people, and activities. But, is a fear-focused strategy one that health care providers should include in their quiver as we try to mold patient behavior? As luck would have it, 2 weeks before this news story broke I encountered a global study from 84 countries that sought to answer this question (Affect Sci. 2022 Sep. doi: 10.1007/s42761-022-00128-3).

Using the WHO four-point advice about COVID prevention (stay home/avoid shops/use face covering/isolate if exposed) as a model the researchers around the world reviewed the responses of 16,000 individuals. They found that there was no difference in the effectiveness of the message whether it was framed as a negative (“you have so much to lose”) or a positive (“you have so much to gain”). However, investigators observed that the negatively framed presentations generated significantly more anxiety in the respondents. The authors of the paper conclude that if there is no significant difference in the effectiveness, why would we chose a negatively framed presentation that is likely to generate anxiety that we know is associated with increased morbidity and mortality. From a purely public health perspective, it doesn’t make sense and is counterproductive.

I guess if we look back to the old carrot and stick metaphor we shouldn’t be surprised by the findings in this paper. If one’s only goal is to get a group of young preschoolers to behave by scaring the b’geezes out of them with a mask or a threat of bodily punishment, then go for it. Scare tactics will probably work just as well as offering a well-chosen reward system. However, the devil is in the side effects. It’s the same argument that I give to parents who argue that spanking works. Of course it does, but it has a narrow margin for safety and can set up ripples of negative side effects that can destroy healthy parent-child relationships.

The bottom line of this story is the sad truth that somewhere along the line someone failed to effectively train these four daycare workers. But, do we as health care providers need to rethink our training? Have we forgotten our commitment to “First do no harm?” As we craft our messaging have we thought enough about the potential side effects of our attempts at scaring the public into following our suggestions?

Dr. Wilkoff practiced primary care pediatrics in Brunswick, Maine, for nearly 40 years. He has authored several books on behavioral pediatrics, including “How to Say No to Your Toddler.” Other than a Littman stethoscope he accepted as a first-year medical student in 1966, Dr. Wilkoff reports having nothing to disclose. Email him at [email protected].

Perineuriomas are benign, slow-growing tumors derived from perineurial cells,¹ which form the structurally supportive perineurium that surrounds individual nerve fascicles.^2,3 Perineuriomas are classified into 2 main forms: intraneural or extraneural.⁴ Intraneural perineuriomas are found within the border of the peripheral nerve,⁵ while extraneural perineuriomas usually are found in soft tissue and skin. Extraneural perineuriomas can be further classified into variants based on their histologic appearance, including reticular, sclerosing, and plexiform subtypes. Extraneural perineuriomas usually present on the extremities or trunk of young to middle-aged adults as a well-circumscribed, painless, subcutaneous masses.¹ These tumors are especially unusual in children.⁴ We present 2 extraneural perineurioma cases in children, and we review the pertinent diagnostic features of perineurioma as well as the presentation in the pediatric population.

Case Reports

Patient 1—A 10-year-old boy with a history of cerebral palsy and related comorbidities presented to the clinic for evaluation of a lesion on the thigh with no associated pain, irritation, erythema, or drainage. Physical examination revealed a soft, pedunculated, mobile nodule on the right medial thigh. An elliptical excision was performed. Gross examination demonstrated a 2.0×2.0×1.8-cm polypoid nodule. Histologic examination showed a dermal-based proliferation of bland spindle cells (Figure 1). The cytomorphology was characterized by elongated tapering nuclei and many areas with delicate bipolar cytoplasmic processes. The constituent cells were arranged in a whorled pattern in a variably myxoid to collagenous stroma. The tumor cells were multifocally positive for CD34; focally positive for smooth muscle actin (SMA); and negative for S-100, epithelial membrane antigen (EMA), GLUT1, claudin-1, STAT6, and desmin. Rb protein was intact. The CD34 immunostain highlighted the cytoplasmic processes. Electron microscopy was performed because the immunohistochemical results were nonspecific despite the favorable histologic features for perineurioma and showed pinocytic vesicles with delicate cytoplasmic processes, characteristic of perineurioma (Figure 2). Follow-up visits were related to the management of multiple comorbidities; no known recurrence of the lesion was documented.

Patient 2—A 15-year-old adolescent boy with no notable medical history presented to the pediatric clinic for a bump on the right upper arm of 4 to 5 months’ duration. He did not recall an injury to the area and denied change in size, redness, bruising, or pain of the lesion. Ultrasonography demonstrated a 2.6×2.3×1.3-cm hypoechoic and slightly heterogeneous, well-circumscribed, subcutaneous mass with internal vascularity. The patient was then referred to a pediatric surgeon. The clinical differential included a lipoma, lymphadenopathy, or sebaceous cyst. An excision was performed. Gross inspection demonstrated a 7-g, 2.8×2.6×1.8-cm, homogeneous, tan-pink, rubbery nodule with minimal surrounding soft tissue. Histologic examination showed a bland proliferation of spindle cells with storiform and whorled patterns (Figure 3). No notable nuclear atypia or necrosis was identified. The tumor cells were focally positive for EMA (Figure 4), claudin-1, and CD34 and negative for S-100, SOX10, GLUT1, desmin, STAT6, pankeratin AE1/AE3, and SMA. The diagnosis of perineurioma was rendered. No recurrence of the lesion was appreciated clinically on a 6-month follow-up examination.

Comment

Characteristics of Perineuriomas—On gross evaluation, perineuriomas are firm, gray-white, and well circumscribed but not encapsulated. Histologically, perineuriomas can have a storiform, whorled, or lamellar pattern of spindle cells. Perivascular whorls can be a histologic clue. The spindle cells are bland appearing and typically are elongated and slender but can appear slightly ovoid and plump. The background stroma can be myxoid, collagenous, or mixed. There usually is no atypia, and mitotic figures are rare.^2,3,6,7 Intraneural perineuriomas vary architecturally in that they display a unique onion bulb–like appearance in which whorls of cytoplasmic material of variable sizes surround central axons.³

Diagnosis—The diagnosis of perineuriomas usually requires characteristic immunohistochemical and sometimes ultrastructural features. Perineuriomas are positive for EMA and GLUT1 and variable for CD34.⁶ Approximately 20% to 91% will be positive for claudin-1, a tight junction protein associated with perineuriomas.⁸ Of note, EMA and GLUT1 usually are positive in both neoplastic and nonneoplastic perineurial cells.^9,10 Occasionally, these tumors can be focally positive for SMA and negative for S-100 and glial fibrillary acidic protein. The bipolar, thin, delicate, cytoplasmic processes with long-tapering nuclei may be easier to appreciate on electron microscopy than on conventional light microscopy. In addition, the cells contain pinocytotic vesicles and a discontinuous external lamina, which may be helpful for diagnosis.¹⁰

Genetics—Genetic alterations in perineurioma continue to be elucidated. Although many soft tissue perineuriomas possess deletion of chromosome 22q material, this is not a consistent finding and is not pathognomonic. Notably, the NF2 tumor suppressor gene is found on chromosome 22.¹¹ For the sclerosing variant of perineurioma, rearrangements or deletions of chromosome 10q have been described. A study of 14 soft tissue/extraneural perineuriomas using whole-exome sequencing and single nucleotide polymorphism array showed 6 cases of recurrent chromosome 22q deletions containing the NF2 locus and 4 cases with a previously unreported finding of chromosome 17q deletions containing the NF1 locus that were mutually exclusive events in all but 1 case.¹² Although perineuriomas can harbor NF1 or NF2 mutations, perineuriomas are not considered to be associated with neurofibromatosis type 1 or 2 (NF1 or NF2, respectively). Patients with NF1 or NF2 and perineurioma are exceedingly rare. One pediatric patient with both soft tissue perineurioma and NF1 has been reported in the literature.¹³

Differential Diagnosis—Perineuriomas should be distinguished from other benign neural neoplasms of the skin and soft tissue. Commonly considered in the differential diagnosis is schwannoma and neurofibroma. Schwannomas are encapsulated epineurial nerve sheath tumors comprised of a neoplastic proliferation of Schwann cells. Schwannomas morphologically differ from perineuriomas because of the presence of the hypercellular Antoni A with Verocay bodies and the hypocellular myxoid Antoni B patterns of spindle cells with elongated wavy nuclei and tapered ends. Other features include hyalinized vessels, hemosiderin deposition, cystic degeneration, and/or degenerative atypia.^3,14 Importantly, the constituent cells of schwannomas are positive for S-100 and SOX10 and negative for EMA.³ Neurofibromas consist of fascicles and whorls of Schwann cells in a background myxoid stroma with scattered mast cells, lymphocytes, fibroblasts, and perineurial cells. Similar to schwannomas, neurofibromas also are positive for S-100 and negative for EMA.^3,14 Neurofibromas can have either a somatic or germline mutation of the biallelic NF1 gene on chromosome 17q11.2 with subsequent loss of protein neurofibromin activity.¹⁵ Less common but still a consideration are the hybrid peripheral nerve sheath tumors that may present with a biphasic or intermingled morphology. Combinations include neurofibroma-schwannoma, schwannoma-perineurioma, and neurofibroma-perineurioma. The hybrid schwannoma-perineurioma has a mixture of thin and plump spindle cells with tapered nuclei as well as patchy S-100 positivity corresponding to schwannian areas. Similarly, S-100 will highlight the wavy Schwann cells in neurofibroma-perineurioma as well as CD34-highlighting fibroblasts.^7,15 In both aforementioned hybrid tumors, EMA will be positive in the perineurial areas. Another potential diagnostic consideration that can occur in both pediatric and adult populations is dermatofibrosarcoma protuberans (DFSP), which is comprised of a dermal proliferation of monomorphic fusiform spindle cells. Although both perineuriomas and DFSP can have a storiform architecture, DFSP is more asymmetric and infiltrative. Dermatofibrosarcoma protuberans is recognized in areas of individual adipocyte trapping, referred to as honeycombing. Dermatofibrosarcoma protuberans typically does not express EMA, though the sclerosing variant of DFSP has been reported to sometimes demonstrate focal EMA reactivity.^11,14,16 For morphologically challenging cases, cytogenetic studies will show t(17;22) translocation fusing the COL1A1 and PDGFRB genes.¹⁶ Finally, for subcutaneous or deep-seated tumors, one also may consider other mesenchymal neoplasms, including solitary fibrous tumor, low-grade fibromyxoid sarcoma, or low-grade malignant peripheral nerve sheath tumor (MPNST).¹¹

Management—Perineuriomas are considered benign. The presence of mitotic figures, pleomorphism, and degenerative nuclear atypia akin to ancient change, as seen in ancient schwannoma, does not affect their benign clinical behavior. Treatment of a perineurioma typically is surgical excision with conservative margins and minimal chance of recurrence.^1,11 So-called malignant perineuriomas are better classified as MPNSTs with perineural differentiation or perineurial MPNST. They also are positive for EMA and may be distinguished from perineurioma by the presence of major atypia and an infiltrative growth pattern.^17,18

Considerations in the Pediatric Population—Few pediatric soft tissue perineuriomas have been reported. A clinicopathologic analysis by Hornick and Fletcher¹ of patients with soft tissue perineurioma showed that only 6 of 81 patients were younger than 20 years. The youngest reported case of perineurioma occurred as an extraneural perineurioma on the scalp in an infant.¹⁹ Only 1 soft tissue perineural MPNST has been reported in the pediatric population, arising on the face of an 11-year-old boy. In a case series of 11 pediatric perineuriomas, including extraneural and intraneural, there was no evidence of recurrence or metastasis at follow-up.⁴

Conclusion

Perineuriomas are rare benign peripheral nerve sheath tumors with unique histologic and immunohistochemical features. Soft tissue perineuriomas in the pediatric population are an important diagnostic consideration, especially for the pediatrician or dermatologist when encountering a well-circumscribed nodular soft tissue lesion of the extremity or when encountering a neural-appearing tumor in the subcutaneous tissue.

Acknowledgment—We would like to thank Christopher Fletcher, MD (Boston, Massachusetts), for his expertise in outside consultation for patient 1.

Perineuriomas are benign, slow-growing tumors derived from perineurial cells,¹ which form the structurally supportive perineurium that surrounds individual nerve fascicles.^2,3 Perineuriomas are classified into 2 main forms: intraneural or extraneural.⁴ Intraneural perineuriomas are found within the border of the peripheral nerve,⁵ while extraneural perineuriomas usually are found in soft tissue and skin. Extraneural perineuriomas can be further classified into variants based on their histologic appearance, including reticular, sclerosing, and plexiform subtypes. Extraneural perineuriomas usually present on the extremities or trunk of young to middle-aged adults as a well-circumscribed, painless, subcutaneous masses.¹ These tumors are especially unusual in children.⁴ We present 2 extraneural perineurioma cases in children, and we review the pertinent diagnostic features of perineurioma as well as the presentation in the pediatric population.

Case Reports

Patient 1—A 10-year-old boy with a history of cerebral palsy and related comorbidities presented to the clinic for evaluation of a lesion on the thigh with no associated pain, irritation, erythema, or drainage. Physical examination revealed a soft, pedunculated, mobile nodule on the right medial thigh. An elliptical excision was performed. Gross examination demonstrated a 2.0×2.0×1.8-cm polypoid nodule. Histologic examination showed a dermal-based proliferation of bland spindle cells (Figure 1). The cytomorphology was characterized by elongated tapering nuclei and many areas with delicate bipolar cytoplasmic processes. The constituent cells were arranged in a whorled pattern in a variably myxoid to collagenous stroma. The tumor cells were multifocally positive for CD34; focally positive for smooth muscle actin (SMA); and negative for S-100, epithelial membrane antigen (EMA), GLUT1, claudin-1, STAT6, and desmin. Rb protein was intact. The CD34 immunostain highlighted the cytoplasmic processes. Electron microscopy was performed because the immunohistochemical results were nonspecific despite the favorable histologic features for perineurioma and showed pinocytic vesicles with delicate cytoplasmic processes, characteristic of perineurioma (Figure 2). Follow-up visits were related to the management of multiple comorbidities; no known recurrence of the lesion was documented.

Patient 2—A 15-year-old adolescent boy with no notable medical history presented to the pediatric clinic for a bump on the right upper arm of 4 to 5 months’ duration. He did not recall an injury to the area and denied change in size, redness, bruising, or pain of the lesion. Ultrasonography demonstrated a 2.6×2.3×1.3-cm hypoechoic and slightly heterogeneous, well-circumscribed, subcutaneous mass with internal vascularity. The patient was then referred to a pediatric surgeon. The clinical differential included a lipoma, lymphadenopathy, or sebaceous cyst. An excision was performed. Gross inspection demonstrated a 7-g, 2.8×2.6×1.8-cm, homogeneous, tan-pink, rubbery nodule with minimal surrounding soft tissue. Histologic examination showed a bland proliferation of spindle cells with storiform and whorled patterns (Figure 3). No notable nuclear atypia or necrosis was identified. The tumor cells were focally positive for EMA (Figure 4), claudin-1, and CD34 and negative for S-100, SOX10, GLUT1, desmin, STAT6, pankeratin AE1/AE3, and SMA. The diagnosis of perineurioma was rendered. No recurrence of the lesion was appreciated clinically on a 6-month follow-up examination.

Comment

Characteristics of Perineuriomas—On gross evaluation, perineuriomas are firm, gray-white, and well circumscribed but not encapsulated. Histologically, perineuriomas can have a storiform, whorled, or lamellar pattern of spindle cells. Perivascular whorls can be a histologic clue. The spindle cells are bland appearing and typically are elongated and slender but can appear slightly ovoid and plump. The background stroma can be myxoid, collagenous, or mixed. There usually is no atypia, and mitotic figures are rare.^2,3,6,7 Intraneural perineuriomas vary architecturally in that they display a unique onion bulb–like appearance in which whorls of cytoplasmic material of variable sizes surround central axons.³

Diagnosis—The diagnosis of perineuriomas usually requires characteristic immunohistochemical and sometimes ultrastructural features. Perineuriomas are positive for EMA and GLUT1 and variable for CD34.⁶ Approximately 20% to 91% will be positive for claudin-1, a tight junction protein associated with perineuriomas.⁸ Of note, EMA and GLUT1 usually are positive in both neoplastic and nonneoplastic perineurial cells.^9,10 Occasionally, these tumors can be focally positive for SMA and negative for S-100 and glial fibrillary acidic protein. The bipolar, thin, delicate, cytoplasmic processes with long-tapering nuclei may be easier to appreciate on electron microscopy than on conventional light microscopy. In addition, the cells contain pinocytotic vesicles and a discontinuous external lamina, which may be helpful for diagnosis.¹⁰

Genetics—Genetic alterations in perineurioma continue to be elucidated. Although many soft tissue perineuriomas possess deletion of chromosome 22q material, this is not a consistent finding and is not pathognomonic. Notably, the NF2 tumor suppressor gene is found on chromosome 22.¹¹ For the sclerosing variant of perineurioma, rearrangements or deletions of chromosome 10q have been described. A study of 14 soft tissue/extraneural perineuriomas using whole-exome sequencing and single nucleotide polymorphism array showed 6 cases of recurrent chromosome 22q deletions containing the NF2 locus and 4 cases with a previously unreported finding of chromosome 17q deletions containing the NF1 locus that were mutually exclusive events in all but 1 case.¹² Although perineuriomas can harbor NF1 or NF2 mutations, perineuriomas are not considered to be associated with neurofibromatosis type 1 or 2 (NF1 or NF2, respectively). Patients with NF1 or NF2 and perineurioma are exceedingly rare. One pediatric patient with both soft tissue perineurioma and NF1 has been reported in the literature.¹³

Differential Diagnosis—Perineuriomas should be distinguished from other benign neural neoplasms of the skin and soft tissue. Commonly considered in the differential diagnosis is schwannoma and neurofibroma. Schwannomas are encapsulated epineurial nerve sheath tumors comprised of a neoplastic proliferation of Schwann cells. Schwannomas morphologically differ from perineuriomas because of the presence of the hypercellular Antoni A with Verocay bodies and the hypocellular myxoid Antoni B patterns of spindle cells with elongated wavy nuclei and tapered ends. Other features include hyalinized vessels, hemosiderin deposition, cystic degeneration, and/or degenerative atypia.^3,14 Importantly, the constituent cells of schwannomas are positive for S-100 and SOX10 and negative for EMA.³ Neurofibromas consist of fascicles and whorls of Schwann cells in a background myxoid stroma with scattered mast cells, lymphocytes, fibroblasts, and perineurial cells. Similar to schwannomas, neurofibromas also are positive for S-100 and negative for EMA.^3,14 Neurofibromas can have either a somatic or germline mutation of the biallelic NF1 gene on chromosome 17q11.2 with subsequent loss of protein neurofibromin activity.¹⁵ Less common but still a consideration are the hybrid peripheral nerve sheath tumors that may present with a biphasic or intermingled morphology. Combinations include neurofibroma-schwannoma, schwannoma-perineurioma, and neurofibroma-perineurioma. The hybrid schwannoma-perineurioma has a mixture of thin and plump spindle cells with tapered nuclei as well as patchy S-100 positivity corresponding to schwannian areas. Similarly, S-100 will highlight the wavy Schwann cells in neurofibroma-perineurioma as well as CD34-highlighting fibroblasts.^7,15 In both aforementioned hybrid tumors, EMA will be positive in the perineurial areas. Another potential diagnostic consideration that can occur in both pediatric and adult populations is dermatofibrosarcoma protuberans (DFSP), which is comprised of a dermal proliferation of monomorphic fusiform spindle cells. Although both perineuriomas and DFSP can have a storiform architecture, DFSP is more asymmetric and infiltrative. Dermatofibrosarcoma protuberans is recognized in areas of individual adipocyte trapping, referred to as honeycombing. Dermatofibrosarcoma protuberans typically does not express EMA, though the sclerosing variant of DFSP has been reported to sometimes demonstrate focal EMA reactivity.^11,14,16 For morphologically challenging cases, cytogenetic studies will show t(17;22) translocation fusing the COL1A1 and PDGFRB genes.¹⁶ Finally, for subcutaneous or deep-seated tumors, one also may consider other mesenchymal neoplasms, including solitary fibrous tumor, low-grade fibromyxoid sarcoma, or low-grade malignant peripheral nerve sheath tumor (MPNST).¹¹

Management—Perineuriomas are considered benign. The presence of mitotic figures, pleomorphism, and degenerative nuclear atypia akin to ancient change, as seen in ancient schwannoma, does not affect their benign clinical behavior. Treatment of a perineurioma typically is surgical excision with conservative margins and minimal chance of recurrence.^1,11 So-called malignant perineuriomas are better classified as MPNSTs with perineural differentiation or perineurial MPNST. They also are positive for EMA and may be distinguished from perineurioma by the presence of major atypia and an infiltrative growth pattern.^17,18

Considerations in the Pediatric Population—Few pediatric soft tissue perineuriomas have been reported. A clinicopathologic analysis by Hornick and Fletcher¹ of patients with soft tissue perineurioma showed that only 6 of 81 patients were younger than 20 years. The youngest reported case of perineurioma occurred as an extraneural perineurioma on the scalp in an infant.¹⁹ Only 1 soft tissue perineural MPNST has been reported in the pediatric population, arising on the face of an 11-year-old boy. In a case series of 11 pediatric perineuriomas, including extraneural and intraneural, there was no evidence of recurrence or metastasis at follow-up.⁴

Conclusion

Perineuriomas are rare benign peripheral nerve sheath tumors with unique histologic and immunohistochemical features. Soft tissue perineuriomas in the pediatric population are an important diagnostic consideration, especially for the pediatrician or dermatologist when encountering a well-circumscribed nodular soft tissue lesion of the extremity or when encountering a neural-appearing tumor in the subcutaneous tissue.

Acknowledgment—We would like to thank Christopher Fletcher, MD (Boston, Massachusetts), for his expertise in outside consultation for patient 1.

Perineuriomas are benign, slow-growing tumors derived from perineurial cells,¹ which form the structurally supportive perineurium that surrounds individual nerve fascicles.^2,3 Perineuriomas are classified into 2 main forms: intraneural or extraneural.⁴ Intraneural perineuriomas are found within the border of the peripheral nerve,⁵ while extraneural perineuriomas usually are found in soft tissue and skin. Extraneural perineuriomas can be further classified into variants based on their histologic appearance, including reticular, sclerosing, and plexiform subtypes. Extraneural perineuriomas usually present on the extremities or trunk of young to middle-aged adults as a well-circumscribed, painless, subcutaneous masses.¹ These tumors are especially unusual in children.⁴ We present 2 extraneural perineurioma cases in children, and we review the pertinent diagnostic features of perineurioma as well as the presentation in the pediatric population.

Case Reports

Patient 1—A 10-year-old boy with a history of cerebral palsy and related comorbidities presented to the clinic for evaluation of a lesion on the thigh with no associated pain, irritation, erythema, or drainage. Physical examination revealed a soft, pedunculated, mobile nodule on the right medial thigh. An elliptical excision was performed. Gross examination demonstrated a 2.0×2.0×1.8-cm polypoid nodule. Histologic examination showed a dermal-based proliferation of bland spindle cells (Figure 1). The cytomorphology was characterized by elongated tapering nuclei and many areas with delicate bipolar cytoplasmic processes. The constituent cells were arranged in a whorled pattern in a variably myxoid to collagenous stroma. The tumor cells were multifocally positive for CD34; focally positive for smooth muscle actin (SMA); and negative for S-100, epithelial membrane antigen (EMA), GLUT1, claudin-1, STAT6, and desmin. Rb protein was intact. The CD34 immunostain highlighted the cytoplasmic processes. Electron microscopy was performed because the immunohistochemical results were nonspecific despite the favorable histologic features for perineurioma and showed pinocytic vesicles with delicate cytoplasmic processes, characteristic of perineurioma (Figure 2). Follow-up visits were related to the management of multiple comorbidities; no known recurrence of the lesion was documented.

Patient 2—A 15-year-old adolescent boy with no notable medical history presented to the pediatric clinic for a bump on the right upper arm of 4 to 5 months’ duration. He did not recall an injury to the area and denied change in size, redness, bruising, or pain of the lesion. Ultrasonography demonstrated a 2.6×2.3×1.3-cm hypoechoic and slightly heterogeneous, well-circumscribed, subcutaneous mass with internal vascularity. The patient was then referred to a pediatric surgeon. The clinical differential included a lipoma, lymphadenopathy, or sebaceous cyst. An excision was performed. Gross inspection demonstrated a 7-g, 2.8×2.6×1.8-cm, homogeneous, tan-pink, rubbery nodule with minimal surrounding soft tissue. Histologic examination showed a bland proliferation of spindle cells with storiform and whorled patterns (Figure 3). No notable nuclear atypia or necrosis was identified. The tumor cells were focally positive for EMA (Figure 4), claudin-1, and CD34 and negative for S-100, SOX10, GLUT1, desmin, STAT6, pankeratin AE1/AE3, and SMA. The diagnosis of perineurioma was rendered. No recurrence of the lesion was appreciated clinically on a 6-month follow-up examination.

Comment

Characteristics of Perineuriomas—On gross evaluation, perineuriomas are firm, gray-white, and well circumscribed but not encapsulated. Histologically, perineuriomas can have a storiform, whorled, or lamellar pattern of spindle cells. Perivascular whorls can be a histologic clue. The spindle cells are bland appearing and typically are elongated and slender but can appear slightly ovoid and plump. The background stroma can be myxoid, collagenous, or mixed. There usually is no atypia, and mitotic figures are rare.^2,3,6,7 Intraneural perineuriomas vary architecturally in that they display a unique onion bulb–like appearance in which whorls of cytoplasmic material of variable sizes surround central axons.³

Diagnosis—The diagnosis of perineuriomas usually requires characteristic immunohistochemical and sometimes ultrastructural features. Perineuriomas are positive for EMA and GLUT1 and variable for CD34.⁶ Approximately 20% to 91% will be positive for claudin-1, a tight junction protein associated with perineuriomas.⁸ Of note, EMA and GLUT1 usually are positive in both neoplastic and nonneoplastic perineurial cells.^9,10 Occasionally, these tumors can be focally positive for SMA and negative for S-100 and glial fibrillary acidic protein. The bipolar, thin, delicate, cytoplasmic processes with long-tapering nuclei may be easier to appreciate on electron microscopy than on conventional light microscopy. In addition, the cells contain pinocytotic vesicles and a discontinuous external lamina, which may be helpful for diagnosis.¹⁰

Genetics—Genetic alterations in perineurioma continue to be elucidated. Although many soft tissue perineuriomas possess deletion of chromosome 22q material, this is not a consistent finding and is not pathognomonic. Notably, the NF2 tumor suppressor gene is found on chromosome 22.¹¹ For the sclerosing variant of perineurioma, rearrangements or deletions of chromosome 10q have been described. A study of 14 soft tissue/extraneural perineuriomas using whole-exome sequencing and single nucleotide polymorphism array showed 6 cases of recurrent chromosome 22q deletions containing the NF2 locus and 4 cases with a previously unreported finding of chromosome 17q deletions containing the NF1 locus that were mutually exclusive events in all but 1 case.¹² Although perineuriomas can harbor NF1 or NF2 mutations, perineuriomas are not considered to be associated with neurofibromatosis type 1 or 2 (NF1 or NF2, respectively). Patients with NF1 or NF2 and perineurioma are exceedingly rare. One pediatric patient with both soft tissue perineurioma and NF1 has been reported in the literature.¹³

Differential Diagnosis—Perineuriomas should be distinguished from other benign neural neoplasms of the skin and soft tissue. Commonly considered in the differential diagnosis is schwannoma and neurofibroma. Schwannomas are encapsulated epineurial nerve sheath tumors comprised of a neoplastic proliferation of Schwann cells. Schwannomas morphologically differ from perineuriomas because of the presence of the hypercellular Antoni A with Verocay bodies and the hypocellular myxoid Antoni B patterns of spindle cells with elongated wavy nuclei and tapered ends. Other features include hyalinized vessels, hemosiderin deposition, cystic degeneration, and/or degenerative atypia.^3,14 Importantly, the constituent cells of schwannomas are positive for S-100 and SOX10 and negative for EMA.³ Neurofibromas consist of fascicles and whorls of Schwann cells in a background myxoid stroma with scattered mast cells, lymphocytes, fibroblasts, and perineurial cells. Similar to schwannomas, neurofibromas also are positive for S-100 and negative for EMA.^3,14 Neurofibromas can have either a somatic or germline mutation of the biallelic NF1 gene on chromosome 17q11.2 with subsequent loss of protein neurofibromin activity.¹⁵ Less common but still a consideration are the hybrid peripheral nerve sheath tumors that may present with a biphasic or intermingled morphology. Combinations include neurofibroma-schwannoma, schwannoma-perineurioma, and neurofibroma-perineurioma. The hybrid schwannoma-perineurioma has a mixture of thin and plump spindle cells with tapered nuclei as well as patchy S-100 positivity corresponding to schwannian areas. Similarly, S-100 will highlight the wavy Schwann cells in neurofibroma-perineurioma as well as CD34-highlighting fibroblasts.^7,15 In both aforementioned hybrid tumors, EMA will be positive in the perineurial areas. Another potential diagnostic consideration that can occur in both pediatric and adult populations is dermatofibrosarcoma protuberans (DFSP), which is comprised of a dermal proliferation of monomorphic fusiform spindle cells. Although both perineuriomas and DFSP can have a storiform architecture, DFSP is more asymmetric and infiltrative. Dermatofibrosarcoma protuberans is recognized in areas of individual adipocyte trapping, referred to as honeycombing. Dermatofibrosarcoma protuberans typically does not express EMA, though the sclerosing variant of DFSP has been reported to sometimes demonstrate focal EMA reactivity.^11,14,16 For morphologically challenging cases, cytogenetic studies will show t(17;22) translocation fusing the COL1A1 and PDGFRB genes.¹⁶ Finally, for subcutaneous or deep-seated tumors, one also may consider other mesenchymal neoplasms, including solitary fibrous tumor, low-grade fibromyxoid sarcoma, or low-grade malignant peripheral nerve sheath tumor (MPNST).¹¹

Management—Perineuriomas are considered benign. The presence of mitotic figures, pleomorphism, and degenerative nuclear atypia akin to ancient change, as seen in ancient schwannoma, does not affect their benign clinical behavior. Treatment of a perineurioma typically is surgical excision with conservative margins and minimal chance of recurrence.^1,11 So-called malignant perineuriomas are better classified as MPNSTs with perineural differentiation or perineurial MPNST. They also are positive for EMA and may be distinguished from perineurioma by the presence of major atypia and an infiltrative growth pattern.^17,18

Considerations in the Pediatric Population—Few pediatric soft tissue perineuriomas have been reported. A clinicopathologic analysis by Hornick and Fletcher¹ of patients with soft tissue perineurioma showed that only 6 of 81 patients were younger than 20 years. The youngest reported case of perineurioma occurred as an extraneural perineurioma on the scalp in an infant.¹⁹ Only 1 soft tissue perineural MPNST has been reported in the pediatric population, arising on the face of an 11-year-old boy. In a case series of 11 pediatric perineuriomas, including extraneural and intraneural, there was no evidence of recurrence or metastasis at follow-up.⁴

Conclusion

Perineuriomas are rare benign peripheral nerve sheath tumors with unique histologic and immunohistochemical features. Soft tissue perineuriomas in the pediatric population are an important diagnostic consideration, especially for the pediatrician or dermatologist when encountering a well-circumscribed nodular soft tissue lesion of the extremity or when encountering a neural-appearing tumor in the subcutaneous tissue.

Acknowledgment—We would like to thank Christopher Fletcher, MD (Boston, Massachusetts), for his expertise in outside consultation for patient 1.

Atopic dermatitis (AD), or eczema, is a common inflammatory skin disease notorious for its chronic, relapsing, and often frustrating disease course. Although as many as 25% of children in the United States are affected by this condition and its impact on the quality of life of affected patients and families is profound,^1-3 therapeutic advances in the pediatric population have been fairly limited until recently.

Over the last 10 years, there has been robust investigation into pediatric AD therapeutics, with many topical and systemic medications either recently approved or under clinical investigation. These developments are changing the landscape of the management of pediatric AD and raise a set of fascinating questions about how early and aggressive intervention might change the course of this disease. We discuss current limitations in the field that may be addressed with additional research.

New Topical Medications

In the last several years, there has been a rapid increase in efforts to develop new topical agents to manage AD. Until the beginning of the 21st century, the dermatologist’s arsenal was limited to topical corticosteroids (TCs). In the early 2000s, attention shifted to topical calcineurin inhibitors as nonsteroidal alternatives when the US Food and Drug Administration (FDA) approved topical tacrolimus and pimecrolimus for AD. In 2016, crisaborole (a phosphodiesterase-4 [PDE4] inhibitor) was approved by the FDA for use in mild to moderate AD in patients 2 years and older, marking a new age of development for topical AD therapies. In 2021, the FDA approved ruxolitinib (a topical Janus kinase [JAK] 1/2 inhibitor) for use in mild to moderate AD in patients 12 years and older.

Roflumilast (ARQ-151) and difamilast (OPA-15406)(members of the PDE4 inhibitor class) are undergoing investigation for pediatric AD. A phase 3 clinical trial for roflumilast for AD is underway (ClinicalTrial.gov Identifier: NCT04845620); it is already approved for psoriasis in patients 12 years and older. A phase 3 trial of difamilast (NCT03911401) was recently completed, with results supporting the drug’s safety and efficacy in AD management.⁴ Efforts to synthesize new better-targeted PDE4 inhibitors are ongoing.⁵

Tapinarof (a novel aryl hydrocarbon receptor-modulating agent) is approved for psoriasis in adults, and a phase 3 trial for management of pediatric AD is underway (NCT05032859) after phase 2 trials revealed promising results.⁶

Lastly, the microbiome is a target for AD topical therapies. A recently completed phase 1 trial of bacteriotherapy with Staphylococcus hominis A9 transplant lotion showed promising results (NCT03151148).⁷ Although this bacteriotherapy technique is early in development and has been studied only in adult patients, results are exciting because they represent a gateway to a largely unexplored realm of potential future therapies.

Standard of Care—How will these new topical therapies impact our standard of care for pediatric AD patients? Topical corticosteroids are still a pillar of topical AD therapy, but the potential for nonsteroidal topical agents as alternatives and used in combination therapeutic regimens has expanded exponentially. It is uncertain how we might individualize regimens tailored to patient-specific factors because the standard approach has been to test drugs as monotherapy, with vehicle comparisons or with reference medications in Europe.

Newer topical nonsteroidal agents may offer several opportunities. First, they may help avoid local and systemic adverse effects that often limit the use of current standard therapy.⁸ This capability may prove essential in bridging TC treatments and serving as long-term maintenance therapies to decrease the frequency of eczema flares. Second, they can alleviate the need for different medication strengths for different body regions, thereby allowing for simplification of regimens and potentially increased adherence and decreased disease burden—a boon to affected patients and caregivers.

Although the efficacy and long-term safety profile of these new drugs require further study, it does not seem unreasonable to look forward to achieving levels of optimization and individualization with topical regimens for AD in the near future that makes flares in patients with mild to moderate AD a phenomenon of the past.

Advances in Systemic Therapy

Systemic therapeutics in pediatric AD also recently entered an exciting era of development. Traditional systemic agents, including cyclosporine, methotrexate, azathioprine, and mycophenolate mofetil, have existed for decades but have not been widely utilized for moderate to severe AD in the United States, especially in the pediatric population, likely because these drugs lacked FDA approval and they can cause a range of adverse effects, including notable immunosuppression.⁹

Introduction and approval of dupilumab in 2017 by the FDA was revolutionary in this field. As a monoclonal antibody targeted against IL-4 and IL-13, dupilumab has consistently demonstrated strong long-term efficacy for pediatric AD and has an acceptable safety profile in children and adolescents.^10-14 Expansion of the label to include children as young as 6 months with moderate to severe AD seems an important milestone in pediatric AD care.

Since the approval of dupilumab for adolescents and children aged 6 to 12 years, global experience has supported expanded use of systemic agents for patients who have an inadequate response to TCs and previously approved nonsteroidal topical agents. How expansive the use of systemics will be in younger children depends on how their long-term use impacts the disease course, whether therapy is disease modifying, and whether early use can curb the development of comorbidities.

Investigations into targeted systemic therapeutics for eczematous dermatitis are not limited to dupilumab. In a study of adolescents as young as 12 years, tralokinumab (an IL-13 pathway inhibitor) demonstrated an Eczema Area Severity Index-75 of 27.8% to 28.6% and a mean decrease in the SCORing Atopic Dermatitis index of 27.5 to 29.1, with minimal adverse effects.¹⁵ Lebrikizumab, another biologic IL-13 inhibitor with strong published safety and efficacy data in adults, has completed short- and longer-term studies in adolescents (NCT04178967 and NCT04146363).¹⁶ The drug received FDA Fast Track designation for moderate to severe AD in patients 12 years and older after showing positive data.¹⁷

This push to targeted therapy stretches beyond monoclonal antibodies. In the last few years, oral JAK inhibitors have emerged as a new class of systemic therapy for eczematous dermatitis. Upadacitinib, a JAK1 selective inhibitor, was approved by the FDA in 2022 for patients 12 years and older with AD and has data that supports its efficacy in adolescents and adults.¹⁸ Other JAK inhibitors including the selective JAK1 inhibitor abrocitinib and the combined JAK1/2 inhibitor baricitinib are being studied for pediatric AD (NCT04564755, NCT03422822, and NCT03952559), with most evidence to date supporting their safety and efficacy, at least over the short-term.¹⁹

The study of these and other advanced systemic therapies for eczematous dermatitis is transforming the toolbox for pediatric AD care. Although long-term data are lacking for some of these medications, it is possible that newer agents may decrease reliance on older immunosuppressants, such as systemic corticosteroids, cyclosporine, and methotrexate. Unanswered questions include: How and which systemic medications may alter the course of the disease? What is the disease modification for AD? What is the impact on comorbidities over time?

What’s Missing?

The field of pediatric AD has experienced exciting new developments with the emergence of targeted therapeutics, but those new agents require more long-term study, though we already have longer-term data on crisaborole and dupilumab.^10-14,20 Studies of the long-term use of these new treatments on comorbidities of pediatric AD—mental health outcomes, cardiovascular disease, effects on the family, and other allergic conditions—are needed.²¹ Furthermore, clinical guidelines that address indications, timing of use, tapering, and discontinuation of new treatments depend on long-term experience and data collection.

Therefore, it is prudent that investigators, companies, payers, patients, and families support phase 4, long-term extension, and registry studies, which will expand our knowledge of AD medications and their impact on the disease over time.

Final Thoughts

Medications to treat AD are reaching a new level of advancement—from topical agents that target novel pathways to revolutionary biologics and systemic medications. Although there are knowledge gaps on these new therapeutics, the standard of care is already rapidly changing as the expectations of clinicians, patients, and families advance with each addition to the provider’s toolbox.

Atopic dermatitis (AD), or eczema, is a common inflammatory skin disease notorious for its chronic, relapsing, and often frustrating disease course. Although as many as 25% of children in the United States are affected by this condition and its impact on the quality of life of affected patients and families is profound,^1-3 therapeutic advances in the pediatric population have been fairly limited until recently.

Over the last 10 years, there has been robust investigation into pediatric AD therapeutics, with many topical and systemic medications either recently approved or under clinical investigation. These developments are changing the landscape of the management of pediatric AD and raise a set of fascinating questions about how early and aggressive intervention might change the course of this disease. We discuss current limitations in the field that may be addressed with additional research.

New Topical Medications

In the last several years, there has been a rapid increase in efforts to develop new topical agents to manage AD. Until the beginning of the 21st century, the dermatologist’s arsenal was limited to topical corticosteroids (TCs). In the early 2000s, attention shifted to topical calcineurin inhibitors as nonsteroidal alternatives when the US Food and Drug Administration (FDA) approved topical tacrolimus and pimecrolimus for AD. In 2016, crisaborole (a phosphodiesterase-4 [PDE4] inhibitor) was approved by the FDA for use in mild to moderate AD in patients 2 years and older, marking a new age of development for topical AD therapies. In 2021, the FDA approved ruxolitinib (a topical Janus kinase [JAK] 1/2 inhibitor) for use in mild to moderate AD in patients 12 years and older.

Roflumilast (ARQ-151) and difamilast (OPA-15406)(members of the PDE4 inhibitor class) are undergoing investigation for pediatric AD. A phase 3 clinical trial for roflumilast for AD is underway (ClinicalTrial.gov Identifier: NCT04845620); it is already approved for psoriasis in patients 12 years and older. A phase 3 trial of difamilast (NCT03911401) was recently completed, with results supporting the drug’s safety and efficacy in AD management.⁴ Efforts to synthesize new better-targeted PDE4 inhibitors are ongoing.⁵

Tapinarof (a novel aryl hydrocarbon receptor-modulating agent) is approved for psoriasis in adults, and a phase 3 trial for management of pediatric AD is underway (NCT05032859) after phase 2 trials revealed promising results.⁶

Lastly, the microbiome is a target for AD topical therapies. A recently completed phase 1 trial of bacteriotherapy with Staphylococcus hominis A9 transplant lotion showed promising results (NCT03151148).⁷ Although this bacteriotherapy technique is early in development and has been studied only in adult patients, results are exciting because they represent a gateway to a largely unexplored realm of potential future therapies.

Standard of Care—How will these new topical therapies impact our standard of care for pediatric AD patients? Topical corticosteroids are still a pillar of topical AD therapy, but the potential for nonsteroidal topical agents as alternatives and used in combination therapeutic regimens has expanded exponentially. It is uncertain how we might individualize regimens tailored to patient-specific factors because the standard approach has been to test drugs as monotherapy, with vehicle comparisons or with reference medications in Europe.

Newer topical nonsteroidal agents may offer several opportunities. First, they may help avoid local and systemic adverse effects that often limit the use of current standard therapy.⁸ This capability may prove essential in bridging TC treatments and serving as long-term maintenance therapies to decrease the frequency of eczema flares. Second, they can alleviate the need for different medication strengths for different body regions, thereby allowing for simplification of regimens and potentially increased adherence and decreased disease burden—a boon to affected patients and caregivers.

Although the efficacy and long-term safety profile of these new drugs require further study, it does not seem unreasonable to look forward to achieving levels of optimization and individualization with topical regimens for AD in the near future that makes flares in patients with mild to moderate AD a phenomenon of the past.

Advances in Systemic Therapy

Systemic therapeutics in pediatric AD also recently entered an exciting era of development. Traditional systemic agents, including cyclosporine, methotrexate, azathioprine, and mycophenolate mofetil, have existed for decades but have not been widely utilized for moderate to severe AD in the United States, especially in the pediatric population, likely because these drugs lacked FDA approval and they can cause a range of adverse effects, including notable immunosuppression.⁹

Introduction and approval of dupilumab in 2017 by the FDA was revolutionary in this field. As a monoclonal antibody targeted against IL-4 and IL-13, dupilumab has consistently demonstrated strong long-term efficacy for pediatric AD and has an acceptable safety profile in children and adolescents.^10-14 Expansion of the label to include children as young as 6 months with moderate to severe AD seems an important milestone in pediatric AD care.

Since the approval of dupilumab for adolescents and children aged 6 to 12 years, global experience has supported expanded use of systemic agents for patients who have an inadequate response to TCs and previously approved nonsteroidal topical agents. How expansive the use of systemics will be in younger children depends on how their long-term use impacts the disease course, whether therapy is disease modifying, and whether early use can curb the development of comorbidities.

Investigations into targeted systemic therapeutics for eczematous dermatitis are not limited to dupilumab. In a study of adolescents as young as 12 years, tralokinumab (an IL-13 pathway inhibitor) demonstrated an Eczema Area Severity Index-75 of 27.8% to 28.6% and a mean decrease in the SCORing Atopic Dermatitis index of 27.5 to 29.1, with minimal adverse effects.¹⁵ Lebrikizumab, another biologic IL-13 inhibitor with strong published safety and efficacy data in adults, has completed short- and longer-term studies in adolescents (NCT04178967 and NCT04146363).¹⁶ The drug received FDA Fast Track designation for moderate to severe AD in patients 12 years and older after showing positive data.¹⁷

This push to targeted therapy stretches beyond monoclonal antibodies. In the last few years, oral JAK inhibitors have emerged as a new class of systemic therapy for eczematous dermatitis. Upadacitinib, a JAK1 selective inhibitor, was approved by the FDA in 2022 for patients 12 years and older with AD and has data that supports its efficacy in adolescents and adults.¹⁸ Other JAK inhibitors including the selective JAK1 inhibitor abrocitinib and the combined JAK1/2 inhibitor baricitinib are being studied for pediatric AD (NCT04564755, NCT03422822, and NCT03952559), with most evidence to date supporting their safety and efficacy, at least over the short-term.¹⁹

The study of these and other advanced systemic therapies for eczematous dermatitis is transforming the toolbox for pediatric AD care. Although long-term data are lacking for some of these medications, it is possible that newer agents may decrease reliance on older immunosuppressants, such as systemic corticosteroids, cyclosporine, and methotrexate. Unanswered questions include: How and which systemic medications may alter the course of the disease? What is the disease modification for AD? What is the impact on comorbidities over time?

What’s Missing?

The field of pediatric AD has experienced exciting new developments with the emergence of targeted therapeutics, but those new agents require more long-term study, though we already have longer-term data on crisaborole and dupilumab.^10-14,20 Studies of the long-term use of these new treatments on comorbidities of pediatric AD—mental health outcomes, cardiovascular disease, effects on the family, and other allergic conditions—are needed.²¹ Furthermore, clinical guidelines that address indications, timing of use, tapering, and discontinuation of new treatments depend on long-term experience and data collection.

Therefore, it is prudent that investigators, companies, payers, patients, and families support phase 4, long-term extension, and registry studies, which will expand our knowledge of AD medications and their impact on the disease over time.

Final Thoughts

Medications to treat AD are reaching a new level of advancement—from topical agents that target novel pathways to revolutionary biologics and systemic medications. Although there are knowledge gaps on these new therapeutics, the standard of care is already rapidly changing as the expectations of clinicians, patients, and families advance with each addition to the provider’s toolbox.

Atopic dermatitis (AD), or eczema, is a common inflammatory skin disease notorious for its chronic, relapsing, and often frustrating disease course. Although as many as 25% of children in the United States are affected by this condition and its impact on the quality of life of affected patients and families is profound,^1-3 therapeutic advances in the pediatric population have been fairly limited until recently.

Over the last 10 years, there has been robust investigation into pediatric AD therapeutics, with many topical and systemic medications either recently approved or under clinical investigation. These developments are changing the landscape of the management of pediatric AD and raise a set of fascinating questions about how early and aggressive intervention might change the course of this disease. We discuss current limitations in the field that may be addressed with additional research.

New Topical Medications

In the last several years, there has been a rapid increase in efforts to develop new topical agents to manage AD. Until the beginning of the 21st century, the dermatologist’s arsenal was limited to topical corticosteroids (TCs). In the early 2000s, attention shifted to topical calcineurin inhibitors as nonsteroidal alternatives when the US Food and Drug Administration (FDA) approved topical tacrolimus and pimecrolimus for AD. In 2016, crisaborole (a phosphodiesterase-4 [PDE4] inhibitor) was approved by the FDA for use in mild to moderate AD in patients 2 years and older, marking a new age of development for topical AD therapies. In 2021, the FDA approved ruxolitinib (a topical Janus kinase [JAK] 1/2 inhibitor) for use in mild to moderate AD in patients 12 years and older.

Roflumilast (ARQ-151) and difamilast (OPA-15406)(members of the PDE4 inhibitor class) are undergoing investigation for pediatric AD. A phase 3 clinical trial for roflumilast for AD is underway (ClinicalTrial.gov Identifier: NCT04845620); it is already approved for psoriasis in patients 12 years and older. A phase 3 trial of difamilast (NCT03911401) was recently completed, with results supporting the drug’s safety and efficacy in AD management.⁴ Efforts to synthesize new better-targeted PDE4 inhibitors are ongoing.⁵

Tapinarof (a novel aryl hydrocarbon receptor-modulating agent) is approved for psoriasis in adults, and a phase 3 trial for management of pediatric AD is underway (NCT05032859) after phase 2 trials revealed promising results.⁶

Lastly, the microbiome is a target for AD topical therapies. A recently completed phase 1 trial of bacteriotherapy with Staphylococcus hominis A9 transplant lotion showed promising results (NCT03151148).⁷ Although this bacteriotherapy technique is early in development and has been studied only in adult patients, results are exciting because they represent a gateway to a largely unexplored realm of potential future therapies.

Standard of Care—How will these new topical therapies impact our standard of care for pediatric AD patients? Topical corticosteroids are still a pillar of topical AD therapy, but the potential for nonsteroidal topical agents as alternatives and used in combination therapeutic regimens has expanded exponentially. It is uncertain how we might individualize regimens tailored to patient-specific factors because the standard approach has been to test drugs as monotherapy, with vehicle comparisons or with reference medications in Europe.

Newer topical nonsteroidal agents may offer several opportunities. First, they may help avoid local and systemic adverse effects that often limit the use of current standard therapy.⁸ This capability may prove essential in bridging TC treatments and serving as long-term maintenance therapies to decrease the frequency of eczema flares. Second, they can alleviate the need for different medication strengths for different body regions, thereby allowing for simplification of regimens and potentially increased adherence and decreased disease burden—a boon to affected patients and caregivers.

Although the efficacy and long-term safety profile of these new drugs require further study, it does not seem unreasonable to look forward to achieving levels of optimization and individualization with topical regimens for AD in the near future that makes flares in patients with mild to moderate AD a phenomenon of the past.

Advances in Systemic Therapy

Systemic therapeutics in pediatric AD also recently entered an exciting era of development. Traditional systemic agents, including cyclosporine, methotrexate, azathioprine, and mycophenolate mofetil, have existed for decades but have not been widely utilized for moderate to severe AD in the United States, especially in the pediatric population, likely because these drugs lacked FDA approval and they can cause a range of adverse effects, including notable immunosuppression.⁹

Introduction and approval of dupilumab in 2017 by the FDA was revolutionary in this field. As a monoclonal antibody targeted against IL-4 and IL-13, dupilumab has consistently demonstrated strong long-term efficacy for pediatric AD and has an acceptable safety profile in children and adolescents.^10-14 Expansion of the label to include children as young as 6 months with moderate to severe AD seems an important milestone in pediatric AD care.

Since the approval of dupilumab for adolescents and children aged 6 to 12 years, global experience has supported expanded use of systemic agents for patients who have an inadequate response to TCs and previously approved nonsteroidal topical agents. How expansive the use of systemics will be in younger children depends on how their long-term use impacts the disease course, whether therapy is disease modifying, and whether early use can curb the development of comorbidities.

Investigations into targeted systemic therapeutics for eczematous dermatitis are not limited to dupilumab. In a study of adolescents as young as 12 years, tralokinumab (an IL-13 pathway inhibitor) demonstrated an Eczema Area Severity Index-75 of 27.8% to 28.6% and a mean decrease in the SCORing Atopic Dermatitis index of 27.5 to 29.1, with minimal adverse effects.¹⁵ Lebrikizumab, another biologic IL-13 inhibitor with strong published safety and efficacy data in adults, has completed short- and longer-term studies in adolescents (NCT04178967 and NCT04146363).¹⁶ The drug received FDA Fast Track designation for moderate to severe AD in patients 12 years and older after showing positive data.¹⁷

This push to targeted therapy stretches beyond monoclonal antibodies. In the last few years, oral JAK inhibitors have emerged as a new class of systemic therapy for eczematous dermatitis. Upadacitinib, a JAK1 selective inhibitor, was approved by the FDA in 2022 for patients 12 years and older with AD and has data that supports its efficacy in adolescents and adults.¹⁸ Other JAK inhibitors including the selective JAK1 inhibitor abrocitinib and the combined JAK1/2 inhibitor baricitinib are being studied for pediatric AD (NCT04564755, NCT03422822, and NCT03952559), with most evidence to date supporting their safety and efficacy, at least over the short-term.¹⁹

The study of these and other advanced systemic therapies for eczematous dermatitis is transforming the toolbox for pediatric AD care. Although long-term data are lacking for some of these medications, it is possible that newer agents may decrease reliance on older immunosuppressants, such as systemic corticosteroids, cyclosporine, and methotrexate. Unanswered questions include: How and which systemic medications may alter the course of the disease? What is the disease modification for AD? What is the impact on comorbidities over time?

What’s Missing?

The field of pediatric AD has experienced exciting new developments with the emergence of targeted therapeutics, but those new agents require more long-term study, though we already have longer-term data on crisaborole and dupilumab.^10-14,20 Studies of the long-term use of these new treatments on comorbidities of pediatric AD—mental health outcomes, cardiovascular disease, effects on the family, and other allergic conditions—are needed.²¹ Furthermore, clinical guidelines that address indications, timing of use, tapering, and discontinuation of new treatments depend on long-term experience and data collection.

Therefore, it is prudent that investigators, companies, payers, patients, and families support phase 4, long-term extension, and registry studies, which will expand our knowledge of AD medications and their impact on the disease over time.

Final Thoughts

Medications to treat AD are reaching a new level of advancement—from topical agents that target novel pathways to revolutionary biologics and systemic medications. Although there are knowledge gaps on these new therapeutics, the standard of care is already rapidly changing as the expectations of clinicians, patients, and families advance with each addition to the provider’s toolbox.

Acrodermatitis enteropathica (AE) is a rare disorder of zinc metabolism that typically presents in infancy.¹ Although it is clinically characterized by acral and periorificial dermatitis, alopecia, and diarrhea, only 20% of cases present with this triad.² Zinc deficiency in AE can either be acquired or inborn (congenital). Acquired forms can occur from dietary inadequacy or malabsorption, whereas genetic causes are related to an autosomal-recessive disorder affecting zinc transporters.¹ We report a case of a 3-month-old female infant with acquired AE who was successfully treated with zinc supplementation over the course of 3 weeks.

Case Report

A 3-month-old female infant presented to the emergency department with a rash of 2 weeks’ duration. She was born full term with no birth complications. The patient’s mother reported that the rash started on the cheeks, then enlarged and spread to the neck, back, and perineum. The patient also had been having diarrhea during this time. She previously had received mupirocin and cephalexin with no response to treatment. Maternal history was negative for lupus, and the mother’s diet consisted of a variety of foods but not many vegetables. The patient was exclusively breastfed, and there was no pertinent history of similar rashes occurring in other family members.

Physical examination revealed the patient had annular and polycyclic, hyperkeratotic, crusted papules and plaques on the cheeks, neck, back, and axillae, as well as the perineum/groin and perianal regions (Figure 1). The differential diagnosis at the time included neonatal lupus, zinc deficiency, and syphilis. Relevant laboratory testing and a shave biopsy of the left axilla were obtained.

Comment

Etiology of AE—Acrodermatitis enteropathica was first identified in 1942 as an acral rash associated with diarrhea³; in 1973, Barnes and Moynahan⁴ discovered zinc deficiency as a causal agent for these findings. The causes of AE are further subclassified as either an acquired or inborn etiology. Congenital causes commonly are seen in infants within the first few months of life, whereas acquired forms are seen at any age. Acquired forms in infants can occur from failure of the mother to secrete zinc in breast milk, low maternal serum zinc levels, or other reasons causing low nutritional intake. A single mutation in the SLC30A2 gene has been found to markedly reduce zinc concentrations in breast milk, thus causing zinc deficiency in breastfed infants.⁵ Other acquired forms can be caused by malabsorption, sometimes after surgery such as intestinal bypass or from intravenous nutrition without sufficient zinc.¹ The congenital form of AE is an autosomal-recessive disorder occurring from mutations in the SLC39A4 gene located on band 8q24.3. Affected individuals have a decreased ability to absorb zinc in the small intestine because of defects in zinc transporters ZIP and ZnT.⁶ Based on our patient’s laboratory findings and history, it is believed that the zinc deficiency was acquired, as the condition normalized with repletion and has not required any supplementation in the year of follow-up. In addition, the absence of a pertinent family history supported an acquired diagnosis, which has various etiologies, whereas the congenital form primarily is a genetic disease.

Diagnosis of AE—The characteristic clinical features of AE include erythematous, dry, scaly papules and plaques that may evolve into crusted, erosive, pustular lesions. These lesions typically are distributed in a periorificial and acral pattern.^1,2 Although AE includes the clinical triad of acral and periorificial dermatitis, alopecia, and diarrhea, most cases present with only partial features of this syndrome, as seen in our patient, who presented with only 2 symptoms—dermatitis and diarrhea. The diagnosis of AE is based on clinical and laboratory abnormalities, especially a low serum zinc level. Low levels of zinc-dependent enzymes, such as alkaline phosphatase, may support the diagnosis, as seen in our patient. Histologic evaluation is characteristic but is not diagnostic, as the same findings can be seen in other nutritional disorders. Such findings include confluent parakeratosis associated with a reduced granular layer in early lesions and subsequent ballooning of subcorneal keratinocytes, upper epidermal pallor, and intraepidermal clefts. Late lesions exhibit psoriasiform hyperplasia of the epidermis with less epidermal pallor.⁷

Acrodermatitis enteropathica (AE) is a rare disorder of zinc metabolism that typically presents in infancy.¹ Although it is clinically characterized by acral and periorificial dermatitis, alopecia, and diarrhea, only 20% of cases present with this triad.² Zinc deficiency in AE can either be acquired or inborn (congenital). Acquired forms can occur from dietary inadequacy or malabsorption, whereas genetic causes are related to an autosomal-recessive disorder affecting zinc transporters.¹ We report a case of a 3-month-old female infant with acquired AE who was successfully treated with zinc supplementation over the course of 3 weeks.

Case Report

A 3-month-old female infant presented to the emergency department with a rash of 2 weeks’ duration. She was born full term with no birth complications. The patient’s mother reported that the rash started on the cheeks, then enlarged and spread to the neck, back, and perineum. The patient also had been having diarrhea during this time. She previously had received mupirocin and cephalexin with no response to treatment. Maternal history was negative for lupus, and the mother’s diet consisted of a variety of foods but not many vegetables. The patient was exclusively breastfed, and there was no pertinent history of similar rashes occurring in other family members.

Physical examination revealed the patient had annular and polycyclic, hyperkeratotic, crusted papules and plaques on the cheeks, neck, back, and axillae, as well as the perineum/groin and perianal regions (Figure 1). The differential diagnosis at the time included neonatal lupus, zinc deficiency, and syphilis. Relevant laboratory testing and a shave biopsy of the left axilla were obtained.

Comment

Etiology of AE—Acrodermatitis enteropathica was first identified in 1942 as an acral rash associated with diarrhea³; in 1973, Barnes and Moynahan⁴ discovered zinc deficiency as a causal agent for these findings. The causes of AE are further subclassified as either an acquired or inborn etiology. Congenital causes commonly are seen in infants within the first few months of life, whereas acquired forms are seen at any age. Acquired forms in infants can occur from failure of the mother to secrete zinc in breast milk, low maternal serum zinc levels, or other reasons causing low nutritional intake. A single mutation in the SLC30A2 gene has been found to markedly reduce zinc concentrations in breast milk, thus causing zinc deficiency in breastfed infants.⁵ Other acquired forms can be caused by malabsorption, sometimes after surgery such as intestinal bypass or from intravenous nutrition without sufficient zinc.¹ The congenital form of AE is an autosomal-recessive disorder occurring from mutations in the SLC39A4 gene located on band 8q24.3. Affected individuals have a decreased ability to absorb zinc in the small intestine because of defects in zinc transporters ZIP and ZnT.⁶ Based on our patient’s laboratory findings and history, it is believed that the zinc deficiency was acquired, as the condition normalized with repletion and has not required any supplementation in the year of follow-up. In addition, the absence of a pertinent family history supported an acquired diagnosis, which has various etiologies, whereas the congenital form primarily is a genetic disease.

Diagnosis of AE—The characteristic clinical features of AE include erythematous, dry, scaly papules and plaques that may evolve into crusted, erosive, pustular lesions. These lesions typically are distributed in a periorificial and acral pattern.^1,2 Although AE includes the clinical triad of acral and periorificial dermatitis, alopecia, and diarrhea, most cases present with only partial features of this syndrome, as seen in our patient, who presented with only 2 symptoms—dermatitis and diarrhea. The diagnosis of AE is based on clinical and laboratory abnormalities, especially a low serum zinc level. Low levels of zinc-dependent enzymes, such as alkaline phosphatase, may support the diagnosis, as seen in our patient. Histologic evaluation is characteristic but is not diagnostic, as the same findings can be seen in other nutritional disorders. Such findings include confluent parakeratosis associated with a reduced granular layer in early lesions and subsequent ballooning of subcorneal keratinocytes, upper epidermal pallor, and intraepidermal clefts. Late lesions exhibit psoriasiform hyperplasia of the epidermis with less epidermal pallor.⁷

Acrodermatitis enteropathica (AE) is a rare disorder of zinc metabolism that typically presents in infancy.¹ Although it is clinically characterized by acral and periorificial dermatitis, alopecia, and diarrhea, only 20% of cases present with this triad.² Zinc deficiency in AE can either be acquired or inborn (congenital). Acquired forms can occur from dietary inadequacy or malabsorption, whereas genetic causes are related to an autosomal-recessive disorder affecting zinc transporters.¹ We report a case of a 3-month-old female infant with acquired AE who was successfully treated with zinc supplementation over the course of 3 weeks.

Case Report

A 3-month-old female infant presented to the emergency department with a rash of 2 weeks’ duration. She was born full term with no birth complications. The patient’s mother reported that the rash started on the cheeks, then enlarged and spread to the neck, back, and perineum. The patient also had been having diarrhea during this time. She previously had received mupirocin and cephalexin with no response to treatment. Maternal history was negative for lupus, and the mother’s diet consisted of a variety of foods but not many vegetables. The patient was exclusively breastfed, and there was no pertinent history of similar rashes occurring in other family members.

Physical examination revealed the patient had annular and polycyclic, hyperkeratotic, crusted papules and plaques on the cheeks, neck, back, and axillae, as well as the perineum/groin and perianal regions (Figure 1). The differential diagnosis at the time included neonatal lupus, zinc deficiency, and syphilis. Relevant laboratory testing and a shave biopsy of the left axilla were obtained.

Comment

Etiology of AE—Acrodermatitis enteropathica was first identified in 1942 as an acral rash associated with diarrhea³; in 1973, Barnes and Moynahan⁴ discovered zinc deficiency as a causal agent for these findings. The causes of AE are further subclassified as either an acquired or inborn etiology. Congenital causes commonly are seen in infants within the first few months of life, whereas acquired forms are seen at any age. Acquired forms in infants can occur from failure of the mother to secrete zinc in breast milk, low maternal serum zinc levels, or other reasons causing low nutritional intake. A single mutation in the SLC30A2 gene has been found to markedly reduce zinc concentrations in breast milk, thus causing zinc deficiency in breastfed infants.⁵ Other acquired forms can be caused by malabsorption, sometimes after surgery such as intestinal bypass or from intravenous nutrition without sufficient zinc.¹ The congenital form of AE is an autosomal-recessive disorder occurring from mutations in the SLC39A4 gene located on band 8q24.3. Affected individuals have a decreased ability to absorb zinc in the small intestine because of defects in zinc transporters ZIP and ZnT.⁶ Based on our patient’s laboratory findings and history, it is believed that the zinc deficiency was acquired, as the condition normalized with repletion and has not required any supplementation in the year of follow-up. In addition, the absence of a pertinent family history supported an acquired diagnosis, which has various etiologies, whereas the congenital form primarily is a genetic disease.

Diagnosis of AE—The characteristic clinical features of AE include erythematous, dry, scaly papules and plaques that may evolve into crusted, erosive, pustular lesions. These lesions typically are distributed in a periorificial and acral pattern.^1,2 Although AE includes the clinical triad of acral and periorificial dermatitis, alopecia, and diarrhea, most cases present with only partial features of this syndrome, as seen in our patient, who presented with only 2 symptoms—dermatitis and diarrhea. The diagnosis of AE is based on clinical and laboratory abnormalities, especially a low serum zinc level. Low levels of zinc-dependent enzymes, such as alkaline phosphatase, may support the diagnosis, as seen in our patient. Histologic evaluation is characteristic but is not diagnostic, as the same findings can be seen in other nutritional disorders. Such findings include confluent parakeratosis associated with a reduced granular layer in early lesions and subsequent ballooning of subcorneal keratinocytes, upper epidermal pallor, and intraepidermal clefts. Late lesions exhibit psoriasiform hyperplasia of the epidermis with less epidermal pallor.⁷