Psoriasis

Risankizumab showed better efficacy than ustekinumab in treating patients with moderate to severe plaque psoriasis but with similar safety, according to results of a pair of head-to-head trials published in the Lancet.

Courtesy National Psoriasis Foundation

The replicate phase 3, randomized, double-blind, placebo- and active comparator–controlled trials, UltIMMa-1 (NCT02684370) and UltIMMa-2 (NCT02684375) altogether randomized 997 patients to risankizumab, ustekinumab, or placebo. The coprimary endpoints were the proportions of patients achieving 90% reduction in Psoriasis Area and Severity Index (PASI 90) at 16 weeks and a static Physician Global Assessment (sPGA) score of 0 or 1, and the 15 ranked secondary endpoints included proportions of those achieving PASI 100 or sPGA 0, both of which demonstrate total clearance of psoriasis, as well as measures of quality of life improvement.

Compared with those receiving either ustekinumab or placebo, a significantly higher proportion of patients receiving risankizumab achieved the coprimary endpoints, and all secondary endpoints were met. In UltIMMA-1, 75.3% of risankizumab patients achieved PASI 90, compared with 4.9% of placebo patients and 42% of ustekinumab patients (P less than .0001 when comparing it with both placebo and ustekinumab); sPGA of 0 or 1 was achieved by 87.8% of risankizumab patients and only 7.8% of placebo patients and 63% of ustekinumab patients (P less than .0001 when comparing it with both placebo and ustekinumab). Results were similar in UltIMMA-2: 74.8% of risankizumab patients achieved PASI 90, and 83.7% of them achieved sPGA 0 or 1 (P less than .0001 when comparing them with placebo and ustekinumab). According to results of the secondary endpoints, both studies also showed greater rates of clearance and improvements in quality of life among patients receiving risankizumab than among those receiving either placebo or ustekinumab.

The safety profiles across treatment groups were similar in both studies, with the most common adverse events including upper respiratory tract infection, headache, and diarrhea.

Risankizumab is a humanized IgG1 monoclonal antibody that targets the p19 subunit of only interleukin-23, unlike the studies’ active comparator, ustekinumab, which targets both interleukin-23 and interleukin-12. “Selectively blocking interleukin 23 with a p19 inhibitor appears to be one of the best ways to treat psoriasis,” commented Abigail Cline, MD, and Steven R. Feldman, MD, PhD, both of Wake Forest University, Winston-Salem, N.C., in an accompanying editorial (Lancet. 2018 Aug 7;392:616-71.).

The authors of the study reported relationships with various industry entities, including AbbVie, which sponsored the studies and developed risankizumab, and Boehringer Ingelheim, which collaborated in the studies. The authors of the editorial also disclosed relationships with entities, including AbbVie.

[email protected]

SOURCE: Gordon KB et al. Lancet. 2018 Aug 7;392:650-61.

Risankizumab showed better efficacy than ustekinumab in treating patients with moderate to severe plaque psoriasis but with similar safety, according to results of a pair of head-to-head trials published in the Lancet.

Courtesy National Psoriasis Foundation

The replicate phase 3, randomized, double-blind, placebo- and active comparator–controlled trials, UltIMMa-1 (NCT02684370) and UltIMMa-2 (NCT02684375) altogether randomized 997 patients to risankizumab, ustekinumab, or placebo. The coprimary endpoints were the proportions of patients achieving 90% reduction in Psoriasis Area and Severity Index (PASI 90) at 16 weeks and a static Physician Global Assessment (sPGA) score of 0 or 1, and the 15 ranked secondary endpoints included proportions of those achieving PASI 100 or sPGA 0, both of which demonstrate total clearance of psoriasis, as well as measures of quality of life improvement.

Compared with those receiving either ustekinumab or placebo, a significantly higher proportion of patients receiving risankizumab achieved the coprimary endpoints, and all secondary endpoints were met. In UltIMMA-1, 75.3% of risankizumab patients achieved PASI 90, compared with 4.9% of placebo patients and 42% of ustekinumab patients (P less than .0001 when comparing it with both placebo and ustekinumab); sPGA of 0 or 1 was achieved by 87.8% of risankizumab patients and only 7.8% of placebo patients and 63% of ustekinumab patients (P less than .0001 when comparing it with both placebo and ustekinumab). Results were similar in UltIMMA-2: 74.8% of risankizumab patients achieved PASI 90, and 83.7% of them achieved sPGA 0 or 1 (P less than .0001 when comparing them with placebo and ustekinumab). According to results of the secondary endpoints, both studies also showed greater rates of clearance and improvements in quality of life among patients receiving risankizumab than among those receiving either placebo or ustekinumab.

The safety profiles across treatment groups were similar in both studies, with the most common adverse events including upper respiratory tract infection, headache, and diarrhea.

Risankizumab is a humanized IgG1 monoclonal antibody that targets the p19 subunit of only interleukin-23, unlike the studies’ active comparator, ustekinumab, which targets both interleukin-23 and interleukin-12. “Selectively blocking interleukin 23 with a p19 inhibitor appears to be one of the best ways to treat psoriasis,” commented Abigail Cline, MD, and Steven R. Feldman, MD, PhD, both of Wake Forest University, Winston-Salem, N.C., in an accompanying editorial (Lancet. 2018 Aug 7;392:616-71.).

The authors of the study reported relationships with various industry entities, including AbbVie, which sponsored the studies and developed risankizumab, and Boehringer Ingelheim, which collaborated in the studies. The authors of the editorial also disclosed relationships with entities, including AbbVie.

[email protected]

SOURCE: Gordon KB et al. Lancet. 2018 Aug 7;392:650-61.

Risankizumab showed better efficacy than ustekinumab in treating patients with moderate to severe plaque psoriasis but with similar safety, according to results of a pair of head-to-head trials published in the Lancet.

Courtesy National Psoriasis Foundation

The replicate phase 3, randomized, double-blind, placebo- and active comparator–controlled trials, UltIMMa-1 (NCT02684370) and UltIMMa-2 (NCT02684375) altogether randomized 997 patients to risankizumab, ustekinumab, or placebo. The coprimary endpoints were the proportions of patients achieving 90% reduction in Psoriasis Area and Severity Index (PASI 90) at 16 weeks and a static Physician Global Assessment (sPGA) score of 0 or 1, and the 15 ranked secondary endpoints included proportions of those achieving PASI 100 or sPGA 0, both of which demonstrate total clearance of psoriasis, as well as measures of quality of life improvement.

Compared with those receiving either ustekinumab or placebo, a significantly higher proportion of patients receiving risankizumab achieved the coprimary endpoints, and all secondary endpoints were met. In UltIMMA-1, 75.3% of risankizumab patients achieved PASI 90, compared with 4.9% of placebo patients and 42% of ustekinumab patients (P less than .0001 when comparing it with both placebo and ustekinumab); sPGA of 0 or 1 was achieved by 87.8% of risankizumab patients and only 7.8% of placebo patients and 63% of ustekinumab patients (P less than .0001 when comparing it with both placebo and ustekinumab). Results were similar in UltIMMA-2: 74.8% of risankizumab patients achieved PASI 90, and 83.7% of them achieved sPGA 0 or 1 (P less than .0001 when comparing them with placebo and ustekinumab). According to results of the secondary endpoints, both studies also showed greater rates of clearance and improvements in quality of life among patients receiving risankizumab than among those receiving either placebo or ustekinumab.

The safety profiles across treatment groups were similar in both studies, with the most common adverse events including upper respiratory tract infection, headache, and diarrhea.

Risankizumab is a humanized IgG1 monoclonal antibody that targets the p19 subunit of only interleukin-23, unlike the studies’ active comparator, ustekinumab, which targets both interleukin-23 and interleukin-12. “Selectively blocking interleukin 23 with a p19 inhibitor appears to be one of the best ways to treat psoriasis,” commented Abigail Cline, MD, and Steven R. Feldman, MD, PhD, both of Wake Forest University, Winston-Salem, N.C., in an accompanying editorial (Lancet. 2018 Aug 7;392:616-71.).

The authors of the study reported relationships with various industry entities, including AbbVie, which sponsored the studies and developed risankizumab, and Boehringer Ingelheim, which collaborated in the studies. The authors of the editorial also disclosed relationships with entities, including AbbVie.

[email protected]

SOURCE: Gordon KB et al. Lancet. 2018 Aug 7;392:650-61.

Among psoriasis patients, treatment with infliximab was associated with an increased risk of serious infections that led to hospitalization, the use of intravenous antimicrobial therapy, or death, according to a prospective cohort study of cases in the United Kingdom and the Republic of Ireland.

The new data suggest a risk associated with infliximab treatment that previous clinical trials and observational studies were insufficiently powered to detect, according to the investigators, led by Zenas Yiu, of the University of Manchester (England). They found no associations between infection risk and treatment with etanercept, adalimumab, or ustekinumab, and they noted that there are no such data yet on more recently approved biologic therapies for psoriasis, such as secukinumab or ixekizumab.

The British Association of Dermatologists (BAD) recommends infliximab, a tumor necrosis factor (TNF)–blocker, only for severe cases of psoriasis (Psoriasis Area and Severity Index greater than or equal to 20 and a Dermatology Life Quality Index greater than 18), or when other biologics fail or cannot be used.

To address the insufficient power of earlier studies, the researchers used data from the BAD Biologic Interventions Register (BADBIR), a large, prospective psoriasis registry in the United Kingdom and Ireland established in 2007. The analysis included 3,421 subjects in the nonbiologic systemic therapy cohort, and 422 subjects in the all-lines infliximab cohort. The median follow-up period was 1.49 person-years (interquartile range, 2.50 person-years) for the all-lines (not just first-line) infliximab group, and 1.51 person-years (1.84 person-years) for the nonbiologics group.*

Treatment with infliximab was associated with a statistically significant increased risk of serious infection (defined as an infection associated with prolonged hospitalization or use of IV antimicrobial therapy; or an infection that resulted in death), with an adjusted hazard ratio of 1.95 (95% confidence interval, 1.01-3.75), compared with nonbiologic systemic treatments. The risk was higher in the first 6 months (adjusted HR, 3.49; 95% CI, 1.14-10.70), and from 6 months to 1 year (aHR, 2.99; 95% CI, 1.10-8.14,) but did not reach statistical significance at 1 year to 2 years (aHR, 2.03; 95% CI, 0.61-6.79).

There was also an increased risk of serious infection with infliximab compared with methotrexate (aHR, 2.96; 95% CI, 1.58-5.57).

“Given our findings of a higher risk of serious infection associated with infliximab, we provide real-world evidence to reinforce the position of infliximab in the psoriasis treatment hierarchy,” the authors wrote, adding that “patients with severe psoriasis who fulfill the criteria for the prescription of infliximab should be counseled” about the risk of serious infection.

Dr. Yiu disclosed having received nonfinancial support form Novartis, two authors had no disclosures, and the remainder had various disclosures related to pharmaceutical companies. BADBIR is funded by BAD, which receives funding from Pfizer, Janssen Cilag, AbbVie, Novartis, Samsung Bioepis and Eli Lilly for providing pharmacovigilance services.

SOURCE: Yiu ZZN et al. Br J Dermatol. 2018 Aug 2. doi: 10.1111/bjd.17036.

*This article was updated to correctly indicate that the median follow-up period was 1.49 person-years (interquartile range, 2.50 person-years) for the all-lines (not just first-line) infliximab group, and 1.51 person-years (1.84 person-years) for the nonbiologics group.

Among psoriasis patients, treatment with infliximab was associated with an increased risk of serious infections that led to hospitalization, the use of intravenous antimicrobial therapy, or death, according to a prospective cohort study of cases in the United Kingdom and the Republic of Ireland.

The new data suggest a risk associated with infliximab treatment that previous clinical trials and observational studies were insufficiently powered to detect, according to the investigators, led by Zenas Yiu, of the University of Manchester (England). They found no associations between infection risk and treatment with etanercept, adalimumab, or ustekinumab, and they noted that there are no such data yet on more recently approved biologic therapies for psoriasis, such as secukinumab or ixekizumab.

The British Association of Dermatologists (BAD) recommends infliximab, a tumor necrosis factor (TNF)–blocker, only for severe cases of psoriasis (Psoriasis Area and Severity Index greater than or equal to 20 and a Dermatology Life Quality Index greater than 18), or when other biologics fail or cannot be used.

To address the insufficient power of earlier studies, the researchers used data from the BAD Biologic Interventions Register (BADBIR), a large, prospective psoriasis registry in the United Kingdom and Ireland established in 2007. The analysis included 3,421 subjects in the nonbiologic systemic therapy cohort, and 422 subjects in the all-lines infliximab cohort. The median follow-up period was 1.49 person-years (interquartile range, 2.50 person-years) for the all-lines (not just first-line) infliximab group, and 1.51 person-years (1.84 person-years) for the nonbiologics group.*

Treatment with infliximab was associated with a statistically significant increased risk of serious infection (defined as an infection associated with prolonged hospitalization or use of IV antimicrobial therapy; or an infection that resulted in death), with an adjusted hazard ratio of 1.95 (95% confidence interval, 1.01-3.75), compared with nonbiologic systemic treatments. The risk was higher in the first 6 months (adjusted HR, 3.49; 95% CI, 1.14-10.70), and from 6 months to 1 year (aHR, 2.99; 95% CI, 1.10-8.14,) but did not reach statistical significance at 1 year to 2 years (aHR, 2.03; 95% CI, 0.61-6.79).

There was also an increased risk of serious infection with infliximab compared with methotrexate (aHR, 2.96; 95% CI, 1.58-5.57).

“Given our findings of a higher risk of serious infection associated with infliximab, we provide real-world evidence to reinforce the position of infliximab in the psoriasis treatment hierarchy,” the authors wrote, adding that “patients with severe psoriasis who fulfill the criteria for the prescription of infliximab should be counseled” about the risk of serious infection.

Dr. Yiu disclosed having received nonfinancial support form Novartis, two authors had no disclosures, and the remainder had various disclosures related to pharmaceutical companies. BADBIR is funded by BAD, which receives funding from Pfizer, Janssen Cilag, AbbVie, Novartis, Samsung Bioepis and Eli Lilly for providing pharmacovigilance services.

SOURCE: Yiu ZZN et al. Br J Dermatol. 2018 Aug 2. doi: 10.1111/bjd.17036.

*This article was updated to correctly indicate that the median follow-up period was 1.49 person-years (interquartile range, 2.50 person-years) for the all-lines (not just first-line) infliximab group, and 1.51 person-years (1.84 person-years) for the nonbiologics group.

Among psoriasis patients, treatment with infliximab was associated with an increased risk of serious infections that led to hospitalization, the use of intravenous antimicrobial therapy, or death, according to a prospective cohort study of cases in the United Kingdom and the Republic of Ireland.

The new data suggest a risk associated with infliximab treatment that previous clinical trials and observational studies were insufficiently powered to detect, according to the investigators, led by Zenas Yiu, of the University of Manchester (England). They found no associations between infection risk and treatment with etanercept, adalimumab, or ustekinumab, and they noted that there are no such data yet on more recently approved biologic therapies for psoriasis, such as secukinumab or ixekizumab.

The British Association of Dermatologists (BAD) recommends infliximab, a tumor necrosis factor (TNF)–blocker, only for severe cases of psoriasis (Psoriasis Area and Severity Index greater than or equal to 20 and a Dermatology Life Quality Index greater than 18), or when other biologics fail or cannot be used.

To address the insufficient power of earlier studies, the researchers used data from the BAD Biologic Interventions Register (BADBIR), a large, prospective psoriasis registry in the United Kingdom and Ireland established in 2007. The analysis included 3,421 subjects in the nonbiologic systemic therapy cohort, and 422 subjects in the all-lines infliximab cohort. The median follow-up period was 1.49 person-years (interquartile range, 2.50 person-years) for the all-lines (not just first-line) infliximab group, and 1.51 person-years (1.84 person-years) for the nonbiologics group.*

Treatment with infliximab was associated with a statistically significant increased risk of serious infection (defined as an infection associated with prolonged hospitalization or use of IV antimicrobial therapy; or an infection that resulted in death), with an adjusted hazard ratio of 1.95 (95% confidence interval, 1.01-3.75), compared with nonbiologic systemic treatments. The risk was higher in the first 6 months (adjusted HR, 3.49; 95% CI, 1.14-10.70), and from 6 months to 1 year (aHR, 2.99; 95% CI, 1.10-8.14,) but did not reach statistical significance at 1 year to 2 years (aHR, 2.03; 95% CI, 0.61-6.79).

There was also an increased risk of serious infection with infliximab compared with methotrexate (aHR, 2.96; 95% CI, 1.58-5.57).

“Given our findings of a higher risk of serious infection associated with infliximab, we provide real-world evidence to reinforce the position of infliximab in the psoriasis treatment hierarchy,” the authors wrote, adding that “patients with severe psoriasis who fulfill the criteria for the prescription of infliximab should be counseled” about the risk of serious infection.

Dr. Yiu disclosed having received nonfinancial support form Novartis, two authors had no disclosures, and the remainder had various disclosures related to pharmaceutical companies. BADBIR is funded by BAD, which receives funding from Pfizer, Janssen Cilag, AbbVie, Novartis, Samsung Bioepis and Eli Lilly for providing pharmacovigilance services.

SOURCE: Yiu ZZN et al. Br J Dermatol. 2018 Aug 2. doi: 10.1111/bjd.17036.

*This article was updated to correctly indicate that the median follow-up period was 1.49 person-years (interquartile range, 2.50 person-years) for the all-lines (not just first-line) infliximab group, and 1.51 person-years (1.84 person-years) for the nonbiologics group.

An allergic reaction is an exaggerated immune response that is known as a type I or immediate hypersensitivity reaction when provoked by reexposure to an allergen or antigen. Upon initial exposure to the antigen, dendritic cells bind it for presentation to helper T (T_H2) lymphocytes. The T_H2 cells then interact with B cells, stimulating them to become plasma cells and produce IgE antibodies to the antigen. When exposed to the same allergen a second time, IgE antibodies bind the allergen and cross-link on mast cells and basophils in the blood. Cross-linking stimulates degranulation of the cells, releasing histamine, leukotrienes, prostaglandins, and other cytokines. The major effects of the release of these mediators include vasodilation, increased vascular permeability, and bronchoconstriction. Leukotrienes also are responsible for chemotaxis of white blood cells, further propagating the immune response.¹

Effects of a type I hypersensitivity reaction can be either local or systemic, resulting in symptoms ranging from mild irritation to anaphylactic shock and death. Latex allergy is a common example of a type I hypersensitivity reaction. Latex is found in many medical products, including gloves, rubber, elastics, blood pressure cuffs, bandages, dressings, and syringes. Reactions can include runny nose, tearing eyes, itching, hives, wheals, wheezing, and in rare cases anaphylaxis.² Diagnosis can be suspected based on history and physical examination. Screening is performed with radioallergosorbent testing, which identifies specific IgE antibodies to latex; however, the reported sensitivity and specificity for the latex-specific IgE antibody varies widely in the literature, and the test cannot reliably rule in or rule out a true latex allergy.³

Allergic responses to latex in psoriasis patients receiving frequent injections with biologic agents are not commonly reported in the literature. We report the case of a patient with a long history of psoriasis who developed an allergic response after exposure to injection devices that contained latex components while undergoing treatment with biologic agents.

Case Report

A 72-year-old man presented with an extensive history of severe psoriasis with frequent flares. Treatment with topical agents and etanercept 6 months prior at an outside facility failed. At the time of presentation, the patient had more than 10% body surface area (BSA) involvement, which included the scalp, legs, chest, and back. He subsequently was started on ustekinumab injections. He initially responded well to therapy, but after 8 months of treatment, he began to have recurrent episodes of acute eruptive rashes over the trunk with associated severe pruritus that reproducibly recurred within 24 hours after each ustekinumab injection. It was decided to discontinue ustekinumab due to concern for intolerance, and the patient was switched to secukinumab. 

After starting secukinumab, the patient's BSA involvement was reduced to 2% after 1 month; however, he began to develop an eruptive rash with severe pruritus again that reproducibly recurred after each secukinumab injection. On physical examination the patient had ill-defined, confluent, erythematous patches over much of the trunk and extremities. Punch biopsies of the eruptive dermatitis showed spongiform psoriasis and eosinophils with dermal hypersensitivity, consistent with a drug eruption. Upon further questioning, the patient noted that he had a long history of a strong latex allergy and he would develop a blistering dermatitis when coming into contact with latex, which caused a high suspicion for a latex allergy as the cause of the patient's acute dermatitis flares from his prior ustekinumab and secukinumab injections. Although it was confirmed with the manufacturers that both the ustekinumab syringe and secukinumab pen did not contain latex, the caps of these medications (and many other biologic injections) do have latex (Table). Other differential diagnoses included an atypical paradoxical   psoriasis flare and a drug eruption to secukinumab, which previously has been reported.⁴

Based on the suspected cause of the eruption, the patient was instructed not to touch the cap of the secukinumab pen. Despite this recommendation, the rash was still present at the next appointment 1 month later. Repeat punch biopsy showed similar findings to the one prior with likely dermal hypersensitivity. The rash improved with steroid injections and continued to improve after holding the secukinumab for 1 month.

After resolution of the hypersensitivity reaction, the patient was started on ixekizumab, which does not contain latex in any component according to the manufacturer. After 2 months of treatment, the patient had 2% BSA involvement of psoriasis and has had no further reports of itching, rash, or other symptoms of a hypersensitivity reaction. On follow-up, the patient's psoriasis symptoms continue to be controlled without further reactions after injections of ixekizumab. Radioallergosorbent testing was not performed due to the lack of specificity and sensitivity of the test3 as well as the patient's known history of latex allergy and characteristic dermatitis that developed after exposure to latex and resolution with removal of the agent. These clinical manifestations are highly indicative of a type I hypersensitivity to injection devices that contain latex components during biologic therapy.

Comment

Allergic responses to latex are most commonly seen in those exposed to gloves or rubber, but little has been reported on reactions to injections with pens or syringes that contain latex components. Some case reports have demonstrated allergic responses in diabetic patients receiving insulin injections.^5,6 MacCracken et al⁵ reported the case of a young boy who had an allergic response to an insulin injection with a syringe containing latex. The patient had a history of bladder exstrophy with a recent diagnosis of diabetes mellitus. It is well known that patients with spina bifida and other conditions who undergo frequent urological procedures more commonly develop latex allergies. This patient reported a history of swollen lips after a dentist visit, presumably due to contact with latex gloves. Because of the suspected allergy, his first insulin injection was given using a glass syringe and insulin was withdrawn with the top removed due to the top containing latex. He did not experience any complications. After being injected later with insulin drawn through the top using a syringe that contained latex, he developed a flare-up of a 0.5-cm erythematous wheal within minutes with associated pruritus.⁵

Towse et al⁶ described another patient with diabetes who developed a local allergic reaction at the site of insulin injections. Workup by the physician ruled out insulin allergy but showed elevated latex-specific IgE antibodies. Future insulin draws through a latex-containing top produced a wheal at the injection site. After switching to latex-free syringes, the allergic reaction resolved.⁶

Latex allergies are common in medical practice, as latex is found in a wide variety of medical supplies, including syringes used for injections and their caps. Physicians need to be aware of latex allergies in their patients and exercise extreme caution in the use of latex-containing products. In the treatment of psoriasis, care must be given when injecting biologic agents. Although many injection devices contain latex limited to the cap, it may be enough to invoke an allergic response. If such a response is elicited, therapy with injection devices that do not contain latex in either the cap or syringe should be considered.

An allergic reaction is an exaggerated immune response that is known as a type I or immediate hypersensitivity reaction when provoked by reexposure to an allergen or antigen. Upon initial exposure to the antigen, dendritic cells bind it for presentation to helper T (T_H2) lymphocytes. The T_H2 cells then interact with B cells, stimulating them to become plasma cells and produce IgE antibodies to the antigen. When exposed to the same allergen a second time, IgE antibodies bind the allergen and cross-link on mast cells and basophils in the blood. Cross-linking stimulates degranulation of the cells, releasing histamine, leukotrienes, prostaglandins, and other cytokines. The major effects of the release of these mediators include vasodilation, increased vascular permeability, and bronchoconstriction. Leukotrienes also are responsible for chemotaxis of white blood cells, further propagating the immune response.¹

Effects of a type I hypersensitivity reaction can be either local or systemic, resulting in symptoms ranging from mild irritation to anaphylactic shock and death. Latex allergy is a common example of a type I hypersensitivity reaction. Latex is found in many medical products, including gloves, rubber, elastics, blood pressure cuffs, bandages, dressings, and syringes. Reactions can include runny nose, tearing eyes, itching, hives, wheals, wheezing, and in rare cases anaphylaxis.² Diagnosis can be suspected based on history and physical examination. Screening is performed with radioallergosorbent testing, which identifies specific IgE antibodies to latex; however, the reported sensitivity and specificity for the latex-specific IgE antibody varies widely in the literature, and the test cannot reliably rule in or rule out a true latex allergy.³

Allergic responses to latex in psoriasis patients receiving frequent injections with biologic agents are not commonly reported in the literature. We report the case of a patient with a long history of psoriasis who developed an allergic response after exposure to injection devices that contained latex components while undergoing treatment with biologic agents.

Case Report

A 72-year-old man presented with an extensive history of severe psoriasis with frequent flares. Treatment with topical agents and etanercept 6 months prior at an outside facility failed. At the time of presentation, the patient had more than 10% body surface area (BSA) involvement, which included the scalp, legs, chest, and back. He subsequently was started on ustekinumab injections. He initially responded well to therapy, but after 8 months of treatment, he began to have recurrent episodes of acute eruptive rashes over the trunk with associated severe pruritus that reproducibly recurred within 24 hours after each ustekinumab injection. It was decided to discontinue ustekinumab due to concern for intolerance, and the patient was switched to secukinumab. 

After starting secukinumab, the patient's BSA involvement was reduced to 2% after 1 month; however, he began to develop an eruptive rash with severe pruritus again that reproducibly recurred after each secukinumab injection. On physical examination the patient had ill-defined, confluent, erythematous patches over much of the trunk and extremities. Punch biopsies of the eruptive dermatitis showed spongiform psoriasis and eosinophils with dermal hypersensitivity, consistent with a drug eruption. Upon further questioning, the patient noted that he had a long history of a strong latex allergy and he would develop a blistering dermatitis when coming into contact with latex, which caused a high suspicion for a latex allergy as the cause of the patient's acute dermatitis flares from his prior ustekinumab and secukinumab injections. Although it was confirmed with the manufacturers that both the ustekinumab syringe and secukinumab pen did not contain latex, the caps of these medications (and many other biologic injections) do have latex (Table). Other differential diagnoses included an atypical paradoxical   psoriasis flare and a drug eruption to secukinumab, which previously has been reported.⁴

Based on the suspected cause of the eruption, the patient was instructed not to touch the cap of the secukinumab pen. Despite this recommendation, the rash was still present at the next appointment 1 month later. Repeat punch biopsy showed similar findings to the one prior with likely dermal hypersensitivity. The rash improved with steroid injections and continued to improve after holding the secukinumab for 1 month.

After resolution of the hypersensitivity reaction, the patient was started on ixekizumab, which does not contain latex in any component according to the manufacturer. After 2 months of treatment, the patient had 2% BSA involvement of psoriasis and has had no further reports of itching, rash, or other symptoms of a hypersensitivity reaction. On follow-up, the patient's psoriasis symptoms continue to be controlled without further reactions after injections of ixekizumab. Radioallergosorbent testing was not performed due to the lack of specificity and sensitivity of the test3 as well as the patient's known history of latex allergy and characteristic dermatitis that developed after exposure to latex and resolution with removal of the agent. These clinical manifestations are highly indicative of a type I hypersensitivity to injection devices that contain latex components during biologic therapy.

Comment

Allergic responses to latex are most commonly seen in those exposed to gloves or rubber, but little has been reported on reactions to injections with pens or syringes that contain latex components. Some case reports have demonstrated allergic responses in diabetic patients receiving insulin injections.^5,6 MacCracken et al⁵ reported the case of a young boy who had an allergic response to an insulin injection with a syringe containing latex. The patient had a history of bladder exstrophy with a recent diagnosis of diabetes mellitus. It is well known that patients with spina bifida and other conditions who undergo frequent urological procedures more commonly develop latex allergies. This patient reported a history of swollen lips after a dentist visit, presumably due to contact with latex gloves. Because of the suspected allergy, his first insulin injection was given using a glass syringe and insulin was withdrawn with the top removed due to the top containing latex. He did not experience any complications. After being injected later with insulin drawn through the top using a syringe that contained latex, he developed a flare-up of a 0.5-cm erythematous wheal within minutes with associated pruritus.⁵

Towse et al⁶ described another patient with diabetes who developed a local allergic reaction at the site of insulin injections. Workup by the physician ruled out insulin allergy but showed elevated latex-specific IgE antibodies. Future insulin draws through a latex-containing top produced a wheal at the injection site. After switching to latex-free syringes, the allergic reaction resolved.⁶

Latex allergies are common in medical practice, as latex is found in a wide variety of medical supplies, including syringes used for injections and their caps. Physicians need to be aware of latex allergies in their patients and exercise extreme caution in the use of latex-containing products. In the treatment of psoriasis, care must be given when injecting biologic agents. Although many injection devices contain latex limited to the cap, it may be enough to invoke an allergic response. If such a response is elicited, therapy with injection devices that do not contain latex in either the cap or syringe should be considered.

An allergic reaction is an exaggerated immune response that is known as a type I or immediate hypersensitivity reaction when provoked by reexposure to an allergen or antigen. Upon initial exposure to the antigen, dendritic cells bind it for presentation to helper T (T_H2) lymphocytes. The T_H2 cells then interact with B cells, stimulating them to become plasma cells and produce IgE antibodies to the antigen. When exposed to the same allergen a second time, IgE antibodies bind the allergen and cross-link on mast cells and basophils in the blood. Cross-linking stimulates degranulation of the cells, releasing histamine, leukotrienes, prostaglandins, and other cytokines. The major effects of the release of these mediators include vasodilation, increased vascular permeability, and bronchoconstriction. Leukotrienes also are responsible for chemotaxis of white blood cells, further propagating the immune response.¹

Effects of a type I hypersensitivity reaction can be either local or systemic, resulting in symptoms ranging from mild irritation to anaphylactic shock and death. Latex allergy is a common example of a type I hypersensitivity reaction. Latex is found in many medical products, including gloves, rubber, elastics, blood pressure cuffs, bandages, dressings, and syringes. Reactions can include runny nose, tearing eyes, itching, hives, wheals, wheezing, and in rare cases anaphylaxis.² Diagnosis can be suspected based on history and physical examination. Screening is performed with radioallergosorbent testing, which identifies specific IgE antibodies to latex; however, the reported sensitivity and specificity for the latex-specific IgE antibody varies widely in the literature, and the test cannot reliably rule in or rule out a true latex allergy.³

Allergic responses to latex in psoriasis patients receiving frequent injections with biologic agents are not commonly reported in the literature. We report the case of a patient with a long history of psoriasis who developed an allergic response after exposure to injection devices that contained latex components while undergoing treatment with biologic agents.

Case Report

A 72-year-old man presented with an extensive history of severe psoriasis with frequent flares. Treatment with topical agents and etanercept 6 months prior at an outside facility failed. At the time of presentation, the patient had more than 10% body surface area (BSA) involvement, which included the scalp, legs, chest, and back. He subsequently was started on ustekinumab injections. He initially responded well to therapy, but after 8 months of treatment, he began to have recurrent episodes of acute eruptive rashes over the trunk with associated severe pruritus that reproducibly recurred within 24 hours after each ustekinumab injection. It was decided to discontinue ustekinumab due to concern for intolerance, and the patient was switched to secukinumab. 

After starting secukinumab, the patient's BSA involvement was reduced to 2% after 1 month; however, he began to develop an eruptive rash with severe pruritus again that reproducibly recurred after each secukinumab injection. On physical examination the patient had ill-defined, confluent, erythematous patches over much of the trunk and extremities. Punch biopsies of the eruptive dermatitis showed spongiform psoriasis and eosinophils with dermal hypersensitivity, consistent with a drug eruption. Upon further questioning, the patient noted that he had a long history of a strong latex allergy and he would develop a blistering dermatitis when coming into contact with latex, which caused a high suspicion for a latex allergy as the cause of the patient's acute dermatitis flares from his prior ustekinumab and secukinumab injections. Although it was confirmed with the manufacturers that both the ustekinumab syringe and secukinumab pen did not contain latex, the caps of these medications (and many other biologic injections) do have latex (Table). Other differential diagnoses included an atypical paradoxical   psoriasis flare and a drug eruption to secukinumab, which previously has been reported.⁴

Based on the suspected cause of the eruption, the patient was instructed not to touch the cap of the secukinumab pen. Despite this recommendation, the rash was still present at the next appointment 1 month later. Repeat punch biopsy showed similar findings to the one prior with likely dermal hypersensitivity. The rash improved with steroid injections and continued to improve after holding the secukinumab for 1 month.

After resolution of the hypersensitivity reaction, the patient was started on ixekizumab, which does not contain latex in any component according to the manufacturer. After 2 months of treatment, the patient had 2% BSA involvement of psoriasis and has had no further reports of itching, rash, or other symptoms of a hypersensitivity reaction. On follow-up, the patient's psoriasis symptoms continue to be controlled without further reactions after injections of ixekizumab. Radioallergosorbent testing was not performed due to the lack of specificity and sensitivity of the test3 as well as the patient's known history of latex allergy and characteristic dermatitis that developed after exposure to latex and resolution with removal of the agent. These clinical manifestations are highly indicative of a type I hypersensitivity to injection devices that contain latex components during biologic therapy.

Comment

Allergic responses to latex are most commonly seen in those exposed to gloves or rubber, but little has been reported on reactions to injections with pens or syringes that contain latex components. Some case reports have demonstrated allergic responses in diabetic patients receiving insulin injections.^5,6 MacCracken et al⁵ reported the case of a young boy who had an allergic response to an insulin injection with a syringe containing latex. The patient had a history of bladder exstrophy with a recent diagnosis of diabetes mellitus. It is well known that patients with spina bifida and other conditions who undergo frequent urological procedures more commonly develop latex allergies. This patient reported a history of swollen lips after a dentist visit, presumably due to contact with latex gloves. Because of the suspected allergy, his first insulin injection was given using a glass syringe and insulin was withdrawn with the top removed due to the top containing latex. He did not experience any complications. After being injected later with insulin drawn through the top using a syringe that contained latex, he developed a flare-up of a 0.5-cm erythematous wheal within minutes with associated pruritus.⁵

Towse et al⁶ described another patient with diabetes who developed a local allergic reaction at the site of insulin injections. Workup by the physician ruled out insulin allergy but showed elevated latex-specific IgE antibodies. Future insulin draws through a latex-containing top produced a wheal at the injection site. After switching to latex-free syringes, the allergic reaction resolved.⁶

Latex allergies are common in medical practice, as latex is found in a wide variety of medical supplies, including syringes used for injections and their caps. Physicians need to be aware of latex allergies in their patients and exercise extreme caution in the use of latex-containing products. In the treatment of psoriasis, care must be given when injecting biologic agents. Although many injection devices contain latex limited to the cap, it may be enough to invoke an allergic response. If such a response is elicited, therapy with injection devices that do not contain latex in either the cap or syringe should be considered.

Inflammatory linear verrucous epidermal nevus (ILVEN) is a rare entity that presents with linear and pruritic psoriasiform plaques and most commonly occurs during childhood. It represents a dysregulation of keratinocytes exhibiting genetic mosaicism.^1,2 Epidermal nevi may derive from keratinocytic, follicular, sebaceous, apocrine, or eccrine origin. Inflammatory linear verrucous epidermal nevus is classified under the keratinocytic type of epidermal nevus and represents approximately 6% of all epidermal nevi.³ The condition presents as erythematous and verrucous plaques along the lines of Blaschko.^2,4 There is a predilection for the legs, and girls are 4 times more commonly affected than boys.¹ Cases of ILVEN are predominantly sporadic, though rare familial cases have been reported.⁴

Inflammatory linear verrucous epidermal nevus is notoriously refractory to treatment. First-line therapies include topical agents such as corticosteroids, calcipotriol, retinoids, and 5-fluorouracil.^3,4 Other treatments include intralesional corticosteroids, cryotherapy, electrodesiccation and curettage, and surgical excision.³ Several case reports have shown promising results using the pulsed dye and ablative CO2 lasers.^5-8

Case Report

An otherwise healthy 20-year-old woman presented with dry, pruritic, red lesions on the right leg that had been present and stable since she was an infant (2 weeks of age). Her medical history included acne vulgaris, but she denied any personal or family history of psoriasis as well as any arthralgia or arthritis. Physical examination revealed discrete, oval, hyperkeratotic, scaly, red plaques on the lateral right leg with a larger hyperkeratotic, linear, red plaque extending from the right popliteal fossa to the posterior thigh (Figure 1A). The nails, scalp, buttocks, and upper extremities were unaffected. Bacterial culture of the right leg demonstrated Staphylococcus aureus colonization. Biopsy of the right popliteal fossa showed psoriasiform dermatitis with psoriasiform hyperplasia, a slightly verruciform surface, broad zones of superficial pallor, and parakeratosis with conspicuous colonies of bacteria (Figure 2).

Following the positive bacterial culture, the patient was treated with a short course of oral doxycycline, which did not alter the clinical appearance of the lesions or improve symptoms of pruritus. Pruritus improved moderately with topical corticosteroid treatment, but clinically the lesions appeared unchanged. The plaque on the superior right leg was treated with a superpulsed CO₂ laser and the plaque on the inferior right leg was treated with a fractional CO₂ laser, both with minimal improvement.

Because of the clinical and histopathologic similarities of the patient's lesions to psoriasis, a trial of the UV 308-nm excimer laser was initiated. Following initial test spots, she completed a total of 18 treatments to all lesions with noticeable clinical improvement (Figure 1B). Initially, the patient returned for treatment biweekly for approximately 5 weeks with 2 small spots being targeted at each session, with an average surface area of approximately 16 cm². She was started at 225 mJ/cm² with 25% increases at each session and ultimately reached up to 1676 mJ/cm² at the end of the 10 sessions. She tolerated the procedure well with some minor blistering. Treatment was deferred for 3 months due to the patient's schedule, then biweekly treatments resumed for 4 weeks, totaling 8 more sessions. At that time, all lesions on the right leg were targeted, with an average surface area of approximately 100 cm². The laser settings were initiated at 225 mJ/cm² with 20% increases at each session and ultimately reached 560 mJ/cm². The treatment was well tolerated throughout; however, the patient initially reported residual pruritus. The plaques continued to improve, and most notably, there was thinning of the hyperkeratotic scale of the plaques in addition to decreased erythema and complete resolution of pruritus. Ultimately, treatment was discontinued because of lack of insurance coverage and financial burden. The patient was lost to follow-up.

Comment

Presentation
Inflammatory linear verrucous epidermal nevus is a rare type of keratinocytic epidermal nevus⁴ that clinically presents as small, discrete, pruritic, scaly plaques coalescing into a linear plaque along the lines of Blaschko.⁹ Considerable pruritus and resistance to treatment are hallmarks of the disease.¹⁰ Histopathologically, ILVEN is characterized by alternating orthokeratosis and parakeratosis with a lack of neutrophils in an acanthotic epidermis.^11-13 Inflammatory linear verrucous epidermal nevus presents at birth or in early childhood. Adult onset is rare.^9,14 Approximately 75% of lesions present by 5 years of age, with a majority occurring within the first 6 months of life.¹⁵ The differential diagnosis includes linear psoriasis, epidermal nevi, linear lichen planus, linear verrucae, linear lichen simplex chronicus, and mycosis fungoides.^4,11

Differentiation From Psoriasis
Despite the histopathologic overlap with psoriasis, ILVEN exhibits fewer Ki-67-positive keratinocyte nuclei (proliferative marker) and more cytokeratin 10-positive cells (epidermal differentiation marker) than psoriasis.¹⁶ Furthermore, ILVEN has demonstrated fewer CD4⁻, CD8⁻, CD45RO⁻, CD2⁻, CD25⁻, CD94⁻, and CD161⁺ cells within the dermis and epidermis than psoriasis.¹⁶

The clinical presentations of ILVEN and psoriasis may be similar, as some patients with linear psoriasis also present with psoriatic plaques along the lines of Blaschko.¹⁷ Additionally, ILVEN may be a precursor to psoriasis. Altman and Mehregan1 found that ILVEN patients who developed psoriasis did so in areas previously affected by ILVEN; however, they continued to distinguish the 2 pathologies as distinct entities. Another early report also hypothesized that the dermoepidermal defect caused by epidermal nevi provided a site for the development of psoriatic lesions because of the Koebner phenomenon.¹⁸

Patients with ILVEN also have been found to have extracutaneous manifestations and symptoms commonly seen in psoriasis patients. A 2012 retrospective review revealed that 37% (7/19) of patients with ILVEN also had psoriatic arthritis, cutaneous psoriatic lesions, and/or nail pitting. The authors concluded that ILVEN may lead to the onset of psoriasis later in life and may indicate an underlying psoriatic predisposition.¹⁹ Genetic theories also have been proposed, stating that ILVEN may be a mosaic of psoriasis2 or that a postzygotic mutation leads to the predisposition for developing psoriasis.²⁰

Treatment
Inflammatory linear verrucous epidermal nevus frequently is refractory to treatment; however, the associated pruritus and distressing cosmesis make treatment attempts worthwhile.¹¹ No single therapy has been found to be successful in all patients. A widely used first-line treatment is topical or intralesional corticosteroids, with the former typically used with occlusion.¹³ Other treatments include adalimumab, calcipotriol,^22,23 tretinoin,²⁴ and 5-fluorouracil.²⁴ Physical modalities such as cryotherapy, electrodesiccation, and dermabrasion have been reported with varying success.^15,24 Surgical treatments include tangential²⁵ and full-thickness excisions.²⁶

The CO₂ laser also has demonstrated success. One study showed considerable improvement of pruritus and partial resolution of lesions only 5 weeks following a single CO₂ laser treatment.⁵ Another study showed promising results when combining CO₂ pulsed laser therapy with fractional CO₂ laser treatment.⁶ Other laser therapies including the argon²⁷ and flashlamp-pumped pulsed dye lasers⁸ have been used with limited success. The use of light therapy and lasers in psoriasis have now increased the treatment options for ILVEN based on the rationale of their shared histopathologic characteristics. Photodynamic therapy also has been attempted because of its successful use in psoriasis patients. It has been found to be successful in diminishing ILVEN lesions and associated pruritus after a few weeks of therapy; however, treatment is limited by the associated pain and requirement for local anesthesia.²⁸

The excimer laser is a form of targeted phototherapy that emits monochromatic light at 308 nm.²⁹ It is ideal for inflammatory skin lesions because the UVB light induces apoptosis.³⁰ Psoriasis lesions treated with the excimer laser show a decrease in keratinocyte proliferation, which in turn reverses epidermal acanthosis and causes T-cell depletion due to upregulation of p53.^29,31 This mechanism of action addresses the overproliferation of keratinocytes mediated by T cells in psoriasis and contributes to the success of excimer laser treatment.³¹ A considerable advantage is its localized treatment, resulting in lower cumulative doses of UVB and reducing the possible carcinogenic and phototoxic risks of whole-body phototherapy.³²

One study examined the antipruritic effects of the excimer laser following the treatment of epidermal hyperinnervation leading to intractable pruritus in patients with atopic dermatitis. The researchers suggested that a potential explanation for the antipruritic effect of the excimer laser may be secondary to nerve degeneration.³³ Additionally, low doses of UVB light also may inhibit mast cell degranulation and prevent histamine release, further supporting the antipruritic properties of excimer laser.³⁴

In our patient, failed treatment with other modalities led to trial of excimer laser therapy because of the overlapping clinical and histopathologic findings with psoriasis. Excimer laser improved the clinical appearance and overall texture of the ILVEN lesions and decreased pruritus. The reasons for treatment success may be two-fold. By decreasing the number of keratinocytes and mast cells, the excimer laser may have improved the epidermal hyperplasia and pruritus in the ILVEN lesions. Alternatively, because the patient had ILVEN lesions since infancy, psoriasis may have developed in the location of the ILVEN lesions due to koebnerization, resulting in the clinical response to excimer therapy; however, she had no other clinical evidence of psoriasis.

Because of the recalcitrance of ILVEN lesions to conventional therapies, it is important to investigate therapies that may be of possible benefit. Our novel case documents successful use of the excimer laser in the treatment of ILVEN. 

Conclusion

Our case of ILVEN in a woman that had been present since infancy highlights the disease pathology as well as a potential new treatment modality. The patient was refractory to first-line treatments and was concerned about the cosmetic appearance of the lesions. The patient was subsequently treated with a trial of a 308-nm excimer laser with clinical improvement of the lesions. It is possible that the similarity of ILVEN and psoriasis may have contributed to the clinical improvement in our patient, but the mechanism of action remains unknown. Due to the paucity of evidence regarding optimal treatment of ILVEN, the current case offers dermatologists an option for patients who are refractory to other treatments.
 

Inflammatory linear verrucous epidermal nevus (ILVEN) is a rare entity that presents with linear and pruritic psoriasiform plaques and most commonly occurs during childhood. It represents a dysregulation of keratinocytes exhibiting genetic mosaicism.^1,2 Epidermal nevi may derive from keratinocytic, follicular, sebaceous, apocrine, or eccrine origin. Inflammatory linear verrucous epidermal nevus is classified under the keratinocytic type of epidermal nevus and represents approximately 6% of all epidermal nevi.³ The condition presents as erythematous and verrucous plaques along the lines of Blaschko.^2,4 There is a predilection for the legs, and girls are 4 times more commonly affected than boys.¹ Cases of ILVEN are predominantly sporadic, though rare familial cases have been reported.⁴

Inflammatory linear verrucous epidermal nevus is notoriously refractory to treatment. First-line therapies include topical agents such as corticosteroids, calcipotriol, retinoids, and 5-fluorouracil.^3,4 Other treatments include intralesional corticosteroids, cryotherapy, electrodesiccation and curettage, and surgical excision.³ Several case reports have shown promising results using the pulsed dye and ablative CO2 lasers.^5-8

Case Report

An otherwise healthy 20-year-old woman presented with dry, pruritic, red lesions on the right leg that had been present and stable since she was an infant (2 weeks of age). Her medical history included acne vulgaris, but she denied any personal or family history of psoriasis as well as any arthralgia or arthritis. Physical examination revealed discrete, oval, hyperkeratotic, scaly, red plaques on the lateral right leg with a larger hyperkeratotic, linear, red plaque extending from the right popliteal fossa to the posterior thigh (Figure 1A). The nails, scalp, buttocks, and upper extremities were unaffected. Bacterial culture of the right leg demonstrated Staphylococcus aureus colonization. Biopsy of the right popliteal fossa showed psoriasiform dermatitis with psoriasiform hyperplasia, a slightly verruciform surface, broad zones of superficial pallor, and parakeratosis with conspicuous colonies of bacteria (Figure 2).

Following the positive bacterial culture, the patient was treated with a short course of oral doxycycline, which did not alter the clinical appearance of the lesions or improve symptoms of pruritus. Pruritus improved moderately with topical corticosteroid treatment, but clinically the lesions appeared unchanged. The plaque on the superior right leg was treated with a superpulsed CO₂ laser and the plaque on the inferior right leg was treated with a fractional CO₂ laser, both with minimal improvement.

Because of the clinical and histopathologic similarities of the patient's lesions to psoriasis, a trial of the UV 308-nm excimer laser was initiated. Following initial test spots, she completed a total of 18 treatments to all lesions with noticeable clinical improvement (Figure 1B). Initially, the patient returned for treatment biweekly for approximately 5 weeks with 2 small spots being targeted at each session, with an average surface area of approximately 16 cm². She was started at 225 mJ/cm² with 25% increases at each session and ultimately reached up to 1676 mJ/cm² at the end of the 10 sessions. She tolerated the procedure well with some minor blistering. Treatment was deferred for 3 months due to the patient's schedule, then biweekly treatments resumed for 4 weeks, totaling 8 more sessions. At that time, all lesions on the right leg were targeted, with an average surface area of approximately 100 cm². The laser settings were initiated at 225 mJ/cm² with 20% increases at each session and ultimately reached 560 mJ/cm². The treatment was well tolerated throughout; however, the patient initially reported residual pruritus. The plaques continued to improve, and most notably, there was thinning of the hyperkeratotic scale of the plaques in addition to decreased erythema and complete resolution of pruritus. Ultimately, treatment was discontinued because of lack of insurance coverage and financial burden. The patient was lost to follow-up.

Comment

Presentation
Inflammatory linear verrucous epidermal nevus is a rare type of keratinocytic epidermal nevus⁴ that clinically presents as small, discrete, pruritic, scaly plaques coalescing into a linear plaque along the lines of Blaschko.⁹ Considerable pruritus and resistance to treatment are hallmarks of the disease.¹⁰ Histopathologically, ILVEN is characterized by alternating orthokeratosis and parakeratosis with a lack of neutrophils in an acanthotic epidermis.^11-13 Inflammatory linear verrucous epidermal nevus presents at birth or in early childhood. Adult onset is rare.^9,14 Approximately 75% of lesions present by 5 years of age, with a majority occurring within the first 6 months of life.¹⁵ The differential diagnosis includes linear psoriasis, epidermal nevi, linear lichen planus, linear verrucae, linear lichen simplex chronicus, and mycosis fungoides.^4,11

Differentiation From Psoriasis
Despite the histopathologic overlap with psoriasis, ILVEN exhibits fewer Ki-67-positive keratinocyte nuclei (proliferative marker) and more cytokeratin 10-positive cells (epidermal differentiation marker) than psoriasis.¹⁶ Furthermore, ILVEN has demonstrated fewer CD4⁻, CD8⁻, CD45RO⁻, CD2⁻, CD25⁻, CD94⁻, and CD161⁺ cells within the dermis and epidermis than psoriasis.¹⁶

The clinical presentations of ILVEN and psoriasis may be similar, as some patients with linear psoriasis also present with psoriatic plaques along the lines of Blaschko.¹⁷ Additionally, ILVEN may be a precursor to psoriasis. Altman and Mehregan1 found that ILVEN patients who developed psoriasis did so in areas previously affected by ILVEN; however, they continued to distinguish the 2 pathologies as distinct entities. Another early report also hypothesized that the dermoepidermal defect caused by epidermal nevi provided a site for the development of psoriatic lesions because of the Koebner phenomenon.¹⁸

Patients with ILVEN also have been found to have extracutaneous manifestations and symptoms commonly seen in psoriasis patients. A 2012 retrospective review revealed that 37% (7/19) of patients with ILVEN also had psoriatic arthritis, cutaneous psoriatic lesions, and/or nail pitting. The authors concluded that ILVEN may lead to the onset of psoriasis later in life and may indicate an underlying psoriatic predisposition.¹⁹ Genetic theories also have been proposed, stating that ILVEN may be a mosaic of psoriasis2 or that a postzygotic mutation leads to the predisposition for developing psoriasis.²⁰

Treatment
Inflammatory linear verrucous epidermal nevus frequently is refractory to treatment; however, the associated pruritus and distressing cosmesis make treatment attempts worthwhile.¹¹ No single therapy has been found to be successful in all patients. A widely used first-line treatment is topical or intralesional corticosteroids, with the former typically used with occlusion.¹³ Other treatments include adalimumab, calcipotriol,^22,23 tretinoin,²⁴ and 5-fluorouracil.²⁴ Physical modalities such as cryotherapy, electrodesiccation, and dermabrasion have been reported with varying success.^15,24 Surgical treatments include tangential²⁵ and full-thickness excisions.²⁶

The CO₂ laser also has demonstrated success. One study showed considerable improvement of pruritus and partial resolution of lesions only 5 weeks following a single CO₂ laser treatment.⁵ Another study showed promising results when combining CO₂ pulsed laser therapy with fractional CO₂ laser treatment.⁶ Other laser therapies including the argon²⁷ and flashlamp-pumped pulsed dye lasers⁸ have been used with limited success. The use of light therapy and lasers in psoriasis have now increased the treatment options for ILVEN based on the rationale of their shared histopathologic characteristics. Photodynamic therapy also has been attempted because of its successful use in psoriasis patients. It has been found to be successful in diminishing ILVEN lesions and associated pruritus after a few weeks of therapy; however, treatment is limited by the associated pain and requirement for local anesthesia.²⁸

The excimer laser is a form of targeted phototherapy that emits monochromatic light at 308 nm.²⁹ It is ideal for inflammatory skin lesions because the UVB light induces apoptosis.³⁰ Psoriasis lesions treated with the excimer laser show a decrease in keratinocyte proliferation, which in turn reverses epidermal acanthosis and causes T-cell depletion due to upregulation of p53.^29,31 This mechanism of action addresses the overproliferation of keratinocytes mediated by T cells in psoriasis and contributes to the success of excimer laser treatment.³¹ A considerable advantage is its localized treatment, resulting in lower cumulative doses of UVB and reducing the possible carcinogenic and phototoxic risks of whole-body phototherapy.³²

One study examined the antipruritic effects of the excimer laser following the treatment of epidermal hyperinnervation leading to intractable pruritus in patients with atopic dermatitis. The researchers suggested that a potential explanation for the antipruritic effect of the excimer laser may be secondary to nerve degeneration.³³ Additionally, low doses of UVB light also may inhibit mast cell degranulation and prevent histamine release, further supporting the antipruritic properties of excimer laser.³⁴

In our patient, failed treatment with other modalities led to trial of excimer laser therapy because of the overlapping clinical and histopathologic findings with psoriasis. Excimer laser improved the clinical appearance and overall texture of the ILVEN lesions and decreased pruritus. The reasons for treatment success may be two-fold. By decreasing the number of keratinocytes and mast cells, the excimer laser may have improved the epidermal hyperplasia and pruritus in the ILVEN lesions. Alternatively, because the patient had ILVEN lesions since infancy, psoriasis may have developed in the location of the ILVEN lesions due to koebnerization, resulting in the clinical response to excimer therapy; however, she had no other clinical evidence of psoriasis.

Because of the recalcitrance of ILVEN lesions to conventional therapies, it is important to investigate therapies that may be of possible benefit. Our novel case documents successful use of the excimer laser in the treatment of ILVEN. 

Conclusion

Our case of ILVEN in a woman that had been present since infancy highlights the disease pathology as well as a potential new treatment modality. The patient was refractory to first-line treatments and was concerned about the cosmetic appearance of the lesions. The patient was subsequently treated with a trial of a 308-nm excimer laser with clinical improvement of the lesions. It is possible that the similarity of ILVEN and psoriasis may have contributed to the clinical improvement in our patient, but the mechanism of action remains unknown. Due to the paucity of evidence regarding optimal treatment of ILVEN, the current case offers dermatologists an option for patients who are refractory to other treatments.
 

Inflammatory linear verrucous epidermal nevus (ILVEN) is a rare entity that presents with linear and pruritic psoriasiform plaques and most commonly occurs during childhood. It represents a dysregulation of keratinocytes exhibiting genetic mosaicism.^1,2 Epidermal nevi may derive from keratinocytic, follicular, sebaceous, apocrine, or eccrine origin. Inflammatory linear verrucous epidermal nevus is classified under the keratinocytic type of epidermal nevus and represents approximately 6% of all epidermal nevi.³ The condition presents as erythematous and verrucous plaques along the lines of Blaschko.^2,4 There is a predilection for the legs, and girls are 4 times more commonly affected than boys.¹ Cases of ILVEN are predominantly sporadic, though rare familial cases have been reported.⁴

Inflammatory linear verrucous epidermal nevus is notoriously refractory to treatment. First-line therapies include topical agents such as corticosteroids, calcipotriol, retinoids, and 5-fluorouracil.^3,4 Other treatments include intralesional corticosteroids, cryotherapy, electrodesiccation and curettage, and surgical excision.³ Several case reports have shown promising results using the pulsed dye and ablative CO2 lasers.^5-8

Case Report

An otherwise healthy 20-year-old woman presented with dry, pruritic, red lesions on the right leg that had been present and stable since she was an infant (2 weeks of age). Her medical history included acne vulgaris, but she denied any personal or family history of psoriasis as well as any arthralgia or arthritis. Physical examination revealed discrete, oval, hyperkeratotic, scaly, red plaques on the lateral right leg with a larger hyperkeratotic, linear, red plaque extending from the right popliteal fossa to the posterior thigh (Figure 1A). The nails, scalp, buttocks, and upper extremities were unaffected. Bacterial culture of the right leg demonstrated Staphylococcus aureus colonization. Biopsy of the right popliteal fossa showed psoriasiform dermatitis with psoriasiform hyperplasia, a slightly verruciform surface, broad zones of superficial pallor, and parakeratosis with conspicuous colonies of bacteria (Figure 2).

Following the positive bacterial culture, the patient was treated with a short course of oral doxycycline, which did not alter the clinical appearance of the lesions or improve symptoms of pruritus. Pruritus improved moderately with topical corticosteroid treatment, but clinically the lesions appeared unchanged. The plaque on the superior right leg was treated with a superpulsed CO₂ laser and the plaque on the inferior right leg was treated with a fractional CO₂ laser, both with minimal improvement.

Because of the clinical and histopathologic similarities of the patient's lesions to psoriasis, a trial of the UV 308-nm excimer laser was initiated. Following initial test spots, she completed a total of 18 treatments to all lesions with noticeable clinical improvement (Figure 1B). Initially, the patient returned for treatment biweekly for approximately 5 weeks with 2 small spots being targeted at each session, with an average surface area of approximately 16 cm². She was started at 225 mJ/cm² with 25% increases at each session and ultimately reached up to 1676 mJ/cm² at the end of the 10 sessions. She tolerated the procedure well with some minor blistering. Treatment was deferred for 3 months due to the patient's schedule, then biweekly treatments resumed for 4 weeks, totaling 8 more sessions. At that time, all lesions on the right leg were targeted, with an average surface area of approximately 100 cm². The laser settings were initiated at 225 mJ/cm² with 20% increases at each session and ultimately reached 560 mJ/cm². The treatment was well tolerated throughout; however, the patient initially reported residual pruritus. The plaques continued to improve, and most notably, there was thinning of the hyperkeratotic scale of the plaques in addition to decreased erythema and complete resolution of pruritus. Ultimately, treatment was discontinued because of lack of insurance coverage and financial burden. The patient was lost to follow-up.

Comment

Presentation
Inflammatory linear verrucous epidermal nevus is a rare type of keratinocytic epidermal nevus⁴ that clinically presents as small, discrete, pruritic, scaly plaques coalescing into a linear plaque along the lines of Blaschko.⁹ Considerable pruritus and resistance to treatment are hallmarks of the disease.¹⁰ Histopathologically, ILVEN is characterized by alternating orthokeratosis and parakeratosis with a lack of neutrophils in an acanthotic epidermis.^11-13 Inflammatory linear verrucous epidermal nevus presents at birth or in early childhood. Adult onset is rare.^9,14 Approximately 75% of lesions present by 5 years of age, with a majority occurring within the first 6 months of life.¹⁵ The differential diagnosis includes linear psoriasis, epidermal nevi, linear lichen planus, linear verrucae, linear lichen simplex chronicus, and mycosis fungoides.^4,11

Differentiation From Psoriasis
Despite the histopathologic overlap with psoriasis, ILVEN exhibits fewer Ki-67-positive keratinocyte nuclei (proliferative marker) and more cytokeratin 10-positive cells (epidermal differentiation marker) than psoriasis.¹⁶ Furthermore, ILVEN has demonstrated fewer CD4⁻, CD8⁻, CD45RO⁻, CD2⁻, CD25⁻, CD94⁻, and CD161⁺ cells within the dermis and epidermis than psoriasis.¹⁶

The clinical presentations of ILVEN and psoriasis may be similar, as some patients with linear psoriasis also present with psoriatic plaques along the lines of Blaschko.¹⁷ Additionally, ILVEN may be a precursor to psoriasis. Altman and Mehregan1 found that ILVEN patients who developed psoriasis did so in areas previously affected by ILVEN; however, they continued to distinguish the 2 pathologies as distinct entities. Another early report also hypothesized that the dermoepidermal defect caused by epidermal nevi provided a site for the development of psoriatic lesions because of the Koebner phenomenon.¹⁸

Patients with ILVEN also have been found to have extracutaneous manifestations and symptoms commonly seen in psoriasis patients. A 2012 retrospective review revealed that 37% (7/19) of patients with ILVEN also had psoriatic arthritis, cutaneous psoriatic lesions, and/or nail pitting. The authors concluded that ILVEN may lead to the onset of psoriasis later in life and may indicate an underlying psoriatic predisposition.¹⁹ Genetic theories also have been proposed, stating that ILVEN may be a mosaic of psoriasis2 or that a postzygotic mutation leads to the predisposition for developing psoriasis.²⁰

Treatment
Inflammatory linear verrucous epidermal nevus frequently is refractory to treatment; however, the associated pruritus and distressing cosmesis make treatment attempts worthwhile.¹¹ No single therapy has been found to be successful in all patients. A widely used first-line treatment is topical or intralesional corticosteroids, with the former typically used with occlusion.¹³ Other treatments include adalimumab, calcipotriol,^22,23 tretinoin,²⁴ and 5-fluorouracil.²⁴ Physical modalities such as cryotherapy, electrodesiccation, and dermabrasion have been reported with varying success.^15,24 Surgical treatments include tangential²⁵ and full-thickness excisions.²⁶

The CO₂ laser also has demonstrated success. One study showed considerable improvement of pruritus and partial resolution of lesions only 5 weeks following a single CO₂ laser treatment.⁵ Another study showed promising results when combining CO₂ pulsed laser therapy with fractional CO₂ laser treatment.⁶ Other laser therapies including the argon²⁷ and flashlamp-pumped pulsed dye lasers⁸ have been used with limited success. The use of light therapy and lasers in psoriasis have now increased the treatment options for ILVEN based on the rationale of their shared histopathologic characteristics. Photodynamic therapy also has been attempted because of its successful use in psoriasis patients. It has been found to be successful in diminishing ILVEN lesions and associated pruritus after a few weeks of therapy; however, treatment is limited by the associated pain and requirement for local anesthesia.²⁸

The excimer laser is a form of targeted phototherapy that emits monochromatic light at 308 nm.²⁹ It is ideal for inflammatory skin lesions because the UVB light induces apoptosis.³⁰ Psoriasis lesions treated with the excimer laser show a decrease in keratinocyte proliferation, which in turn reverses epidermal acanthosis and causes T-cell depletion due to upregulation of p53.^29,31 This mechanism of action addresses the overproliferation of keratinocytes mediated by T cells in psoriasis and contributes to the success of excimer laser treatment.³¹ A considerable advantage is its localized treatment, resulting in lower cumulative doses of UVB and reducing the possible carcinogenic and phototoxic risks of whole-body phototherapy.³²

One study examined the antipruritic effects of the excimer laser following the treatment of epidermal hyperinnervation leading to intractable pruritus in patients with atopic dermatitis. The researchers suggested that a potential explanation for the antipruritic effect of the excimer laser may be secondary to nerve degeneration.³³ Additionally, low doses of UVB light also may inhibit mast cell degranulation and prevent histamine release, further supporting the antipruritic properties of excimer laser.³⁴

In our patient, failed treatment with other modalities led to trial of excimer laser therapy because of the overlapping clinical and histopathologic findings with psoriasis. Excimer laser improved the clinical appearance and overall texture of the ILVEN lesions and decreased pruritus. The reasons for treatment success may be two-fold. By decreasing the number of keratinocytes and mast cells, the excimer laser may have improved the epidermal hyperplasia and pruritus in the ILVEN lesions. Alternatively, because the patient had ILVEN lesions since infancy, psoriasis may have developed in the location of the ILVEN lesions due to koebnerization, resulting in the clinical response to excimer therapy; however, she had no other clinical evidence of psoriasis.

Because of the recalcitrance of ILVEN lesions to conventional therapies, it is important to investigate therapies that may be of possible benefit. Our novel case documents successful use of the excimer laser in the treatment of ILVEN. 

Conclusion

Our case of ILVEN in a woman that had been present since infancy highlights the disease pathology as well as a potential new treatment modality. The patient was refractory to first-line treatments and was concerned about the cosmetic appearance of the lesions. The patient was subsequently treated with a trial of a 308-nm excimer laser with clinical improvement of the lesions. It is possible that the similarity of ILVEN and psoriasis may have contributed to the clinical improvement in our patient, but the mechanism of action remains unknown. Due to the paucity of evidence regarding optimal treatment of ILVEN, the current case offers dermatologists an option for patients who are refractory to other treatments.
 

CHICAGO – Most psoriasis therapies in the pipeline are biologics, including several interleukin (IL)-23 inhibitors and a promising dual inhibitor of IL-17A and IL-17F, so dermatologists are likely to gain a few more options for treating psoriasis patients who have not responded well to or tolerated existing therapies.

“The IL-23 blockers are ideal for patients who want a few injections,” Mark Lebwohl, MD, professor of dermatology at the Icahn School of Medicine at Mount Sinai, New York, and chair of the department of dermatology of the Mount Sinai Health System, said after the American Academy of Dermatology summer meeting. He discussed clinical trial results for risankizumab, mirikizumab, certolizumab pegol (which was recently approved for psoriasis), bimekizumab, as well as tildrakizumab, which has been approved by the Food and Drug Administration, but has not yet been released.

 

Tildrakizumab: The FDA approved tildrakizumab (Ilumya), a selective IL-23p19 inhibitor, for treatment of moderate to severe plaque psoriasis in March 2018 based on data from the reSURFACE 1 and reSURFACE 2 trials. After initial doses at weeks 0 and 4, patients received a 100-mg subcutaneous injection dose every 12 weeks. Results of reSURFACE 1 showed that 14% of trial participants achieved a Psoriasis Area and Severity Index (PASI) score of 100 with tildrakizumab at week 12, compared with 1% of those receiving a placebo. Similarly, 35% achieved a PASI 90 and 64% achieved a PASI 75 with the drug, compared with 3% and 6%, respectively, in the placebo group. Findings for reSURFACE 2 were similar; in a pooled analysis, a quarter of the 371 patients reached PASI 100 by week 28, 36% reached PASI 90-PASI 99, 24% reached PASI 75-PASI 89, and 10% reached PASI 50-PASI 74. Efficacy remained high 2 years after treatment, although body weight affected the efficacy. “The authors concluded that PASI and PGA [Physician Global Assessment] responses were numerically greater in patients with lower versus higher body weight,” Dr. Lebwohl said at the meeting.

Tildrakizumab also has an “overall clean safety profile,” he said. Among all patients treated in the trials, the rate of severe infections, malignancies and major adverse cardiac events did not significantly differ from placebo.*

Risankizumab: Also an IL-23 inhibitor, risankizumab, under FDA review for treatment of moderate to severe plaque psoriasis, outperformed both ustekinumab and adalimumab in pivotal phase 3 trials reported in October 2017. In the two ultlMMa trials, 75% of 598 total patients achieved a PASI 90 score after 16 weeks of treatment, compared with 2%-5% of placebo participants and 42%-48% of those on ustekinumab. In ultlMMa-1, just over a third of patients treated with achieved PASI 100, and just over half did in ultlMMa-2, compared with 12% and 24% of those on ustekinumab, respectively.

At 1 year, the proportion of those with PASI 90 rose to 82% in ultlMMa-1 and 81% in ultlMMa-2, with over half the participants achieving PASI 100 in both studies. The risankizumab trial findings were “among highest efficacy results reported to date, with impressive durability of response on and off drug,” Dr. Lebwohl said. “Preliminary safety is encouraging,” but “long-term data are required.”

Mirikizumab: Although not as far along in clinical trials, mirikizumab is another IL-23 inhibitor with “interesting and impressive preliminary results,” Dr. Lebwohl said. In a phase 2 trial of 205 participants whose baseline demographics indicated more severe psoriasis, 67% achieved PASI 90 at week 16 with a 300-mg dose (administered every 8 weeks). Doses of 100 mg and 30 mg resulted in 59% and 29% of participants achieving PASI 90 at week 16.

“The most common treatment emergent adverse events included upper respiratory tract infection [including viral], injection site pain, hypertension and diarrhea,” Dr. Lebwohl said. Patients are now being recruited for two phase 3 studies of mirikizumab (OASIS-1 and OASIS-2).

Certolizumab pegol: Certolizumab pegol is a tumor necrosis factor blocker approved in 2013 for treatment of psoriatic arthritis, and for moderate to severe plaque psoriasis in May 2018. In a pooled data analysis of three phase 3 trials (CIMPASI-1, CIMPASI-2, and CIMPACT), 52.3% of participants taking 400 mg subcutaneously every 2 weeks and 44.5% of those taking 200 mg every 2 weeks achieved PASI 90 at week 16, compared with 1.6% of those on placebo. In addition, a trial evaluating maternal transfer of certolizumab to the fetus via placenta found minimal drug concentration levels in the umbilical cord and infant’s plasma. “Certolizumab is ideal for women of childbearing potential,” Dr. Lebwohl said after the meeting.

Bimekizumab: This is a dual inhibitor of IL-17A and IL-17F being studied for treatment of mild psoriasis but “is very promising for psoriatic arthritis, as well as psoriasis,” Dr. Lebwohl said. In the phase 2b BE ABLE 1 trial, up to 79% of patients receiving bimekizumab achieved PASI 90 at week 12, and up to 46% of psoriatic arthritis patients had at least a 50% improvement in joint symptoms, compared with 7% of those on placebo.

Dr. Lebwohl is a consultant for Allergan, Boehringer-Ingelheim, Leo and Promius Pharma, and is an employee of Mount Sinai, which receives research funds from Abbvie, Amgen, Boehringer Ingelheim, Celgene, Eli Lilly, Janssen/Johnson & Johnson, Kadmon, Medimmune/AstraZeneca, Novartis, Pfizer, and ViDac Pharma.

*Correction, 8/6/18: An earlier version of this article misstated the adverse event data for tildrakizumab.

CHICAGO – Most psoriasis therapies in the pipeline are biologics, including several interleukin (IL)-23 inhibitors and a promising dual inhibitor of IL-17A and IL-17F, so dermatologists are likely to gain a few more options for treating psoriasis patients who have not responded well to or tolerated existing therapies.

“The IL-23 blockers are ideal for patients who want a few injections,” Mark Lebwohl, MD, professor of dermatology at the Icahn School of Medicine at Mount Sinai, New York, and chair of the department of dermatology of the Mount Sinai Health System, said after the American Academy of Dermatology summer meeting. He discussed clinical trial results for risankizumab, mirikizumab, certolizumab pegol (which was recently approved for psoriasis), bimekizumab, as well as tildrakizumab, which has been approved by the Food and Drug Administration, but has not yet been released.

 

Tildrakizumab: The FDA approved tildrakizumab (Ilumya), a selective IL-23p19 inhibitor, for treatment of moderate to severe plaque psoriasis in March 2018 based on data from the reSURFACE 1 and reSURFACE 2 trials. After initial doses at weeks 0 and 4, patients received a 100-mg subcutaneous injection dose every 12 weeks. Results of reSURFACE 1 showed that 14% of trial participants achieved a Psoriasis Area and Severity Index (PASI) score of 100 with tildrakizumab at week 12, compared with 1% of those receiving a placebo. Similarly, 35% achieved a PASI 90 and 64% achieved a PASI 75 with the drug, compared with 3% and 6%, respectively, in the placebo group. Findings for reSURFACE 2 were similar; in a pooled analysis, a quarter of the 371 patients reached PASI 100 by week 28, 36% reached PASI 90-PASI 99, 24% reached PASI 75-PASI 89, and 10% reached PASI 50-PASI 74. Efficacy remained high 2 years after treatment, although body weight affected the efficacy. “The authors concluded that PASI and PGA [Physician Global Assessment] responses were numerically greater in patients with lower versus higher body weight,” Dr. Lebwohl said at the meeting.

Tildrakizumab also has an “overall clean safety profile,” he said. Among all patients treated in the trials, the rate of severe infections, malignancies and major adverse cardiac events did not significantly differ from placebo.*

Risankizumab: Also an IL-23 inhibitor, risankizumab, under FDA review for treatment of moderate to severe plaque psoriasis, outperformed both ustekinumab and adalimumab in pivotal phase 3 trials reported in October 2017. In the two ultlMMa trials, 75% of 598 total patients achieved a PASI 90 score after 16 weeks of treatment, compared with 2%-5% of placebo participants and 42%-48% of those on ustekinumab. In ultlMMa-1, just over a third of patients treated with achieved PASI 100, and just over half did in ultlMMa-2, compared with 12% and 24% of those on ustekinumab, respectively.

At 1 year, the proportion of those with PASI 90 rose to 82% in ultlMMa-1 and 81% in ultlMMa-2, with over half the participants achieving PASI 100 in both studies. The risankizumab trial findings were “among highest efficacy results reported to date, with impressive durability of response on and off drug,” Dr. Lebwohl said. “Preliminary safety is encouraging,” but “long-term data are required.”

Mirikizumab: Although not as far along in clinical trials, mirikizumab is another IL-23 inhibitor with “interesting and impressive preliminary results,” Dr. Lebwohl said. In a phase 2 trial of 205 participants whose baseline demographics indicated more severe psoriasis, 67% achieved PASI 90 at week 16 with a 300-mg dose (administered every 8 weeks). Doses of 100 mg and 30 mg resulted in 59% and 29% of participants achieving PASI 90 at week 16.

“The most common treatment emergent adverse events included upper respiratory tract infection [including viral], injection site pain, hypertension and diarrhea,” Dr. Lebwohl said. Patients are now being recruited for two phase 3 studies of mirikizumab (OASIS-1 and OASIS-2).

Certolizumab pegol: Certolizumab pegol is a tumor necrosis factor blocker approved in 2013 for treatment of psoriatic arthritis, and for moderate to severe plaque psoriasis in May 2018. In a pooled data analysis of three phase 3 trials (CIMPASI-1, CIMPASI-2, and CIMPACT), 52.3% of participants taking 400 mg subcutaneously every 2 weeks and 44.5% of those taking 200 mg every 2 weeks achieved PASI 90 at week 16, compared with 1.6% of those on placebo. In addition, a trial evaluating maternal transfer of certolizumab to the fetus via placenta found minimal drug concentration levels in the umbilical cord and infant’s plasma. “Certolizumab is ideal for women of childbearing potential,” Dr. Lebwohl said after the meeting.

Bimekizumab: This is a dual inhibitor of IL-17A and IL-17F being studied for treatment of mild psoriasis but “is very promising for psoriatic arthritis, as well as psoriasis,” Dr. Lebwohl said. In the phase 2b BE ABLE 1 trial, up to 79% of patients receiving bimekizumab achieved PASI 90 at week 12, and up to 46% of psoriatic arthritis patients had at least a 50% improvement in joint symptoms, compared with 7% of those on placebo.

Dr. Lebwohl is a consultant for Allergan, Boehringer-Ingelheim, Leo and Promius Pharma, and is an employee of Mount Sinai, which receives research funds from Abbvie, Amgen, Boehringer Ingelheim, Celgene, Eli Lilly, Janssen/Johnson & Johnson, Kadmon, Medimmune/AstraZeneca, Novartis, Pfizer, and ViDac Pharma.

*Correction, 8/6/18: An earlier version of this article misstated the adverse event data for tildrakizumab.

CHICAGO – Most psoriasis therapies in the pipeline are biologics, including several interleukin (IL)-23 inhibitors and a promising dual inhibitor of IL-17A and IL-17F, so dermatologists are likely to gain a few more options for treating psoriasis patients who have not responded well to or tolerated existing therapies.

“The IL-23 blockers are ideal for patients who want a few injections,” Mark Lebwohl, MD, professor of dermatology at the Icahn School of Medicine at Mount Sinai, New York, and chair of the department of dermatology of the Mount Sinai Health System, said after the American Academy of Dermatology summer meeting. He discussed clinical trial results for risankizumab, mirikizumab, certolizumab pegol (which was recently approved for psoriasis), bimekizumab, as well as tildrakizumab, which has been approved by the Food and Drug Administration, but has not yet been released.

 

Tildrakizumab: The FDA approved tildrakizumab (Ilumya), a selective IL-23p19 inhibitor, for treatment of moderate to severe plaque psoriasis in March 2018 based on data from the reSURFACE 1 and reSURFACE 2 trials. After initial doses at weeks 0 and 4, patients received a 100-mg subcutaneous injection dose every 12 weeks. Results of reSURFACE 1 showed that 14% of trial participants achieved a Psoriasis Area and Severity Index (PASI) score of 100 with tildrakizumab at week 12, compared with 1% of those receiving a placebo. Similarly, 35% achieved a PASI 90 and 64% achieved a PASI 75 with the drug, compared with 3% and 6%, respectively, in the placebo group. Findings for reSURFACE 2 were similar; in a pooled analysis, a quarter of the 371 patients reached PASI 100 by week 28, 36% reached PASI 90-PASI 99, 24% reached PASI 75-PASI 89, and 10% reached PASI 50-PASI 74. Efficacy remained high 2 years after treatment, although body weight affected the efficacy. “The authors concluded that PASI and PGA [Physician Global Assessment] responses were numerically greater in patients with lower versus higher body weight,” Dr. Lebwohl said at the meeting.

Tildrakizumab also has an “overall clean safety profile,” he said. Among all patients treated in the trials, the rate of severe infections, malignancies and major adverse cardiac events did not significantly differ from placebo.*

Risankizumab: Also an IL-23 inhibitor, risankizumab, under FDA review for treatment of moderate to severe plaque psoriasis, outperformed both ustekinumab and adalimumab in pivotal phase 3 trials reported in October 2017. In the two ultlMMa trials, 75% of 598 total patients achieved a PASI 90 score after 16 weeks of treatment, compared with 2%-5% of placebo participants and 42%-48% of those on ustekinumab. In ultlMMa-1, just over a third of patients treated with achieved PASI 100, and just over half did in ultlMMa-2, compared with 12% and 24% of those on ustekinumab, respectively.

At 1 year, the proportion of those with PASI 90 rose to 82% in ultlMMa-1 and 81% in ultlMMa-2, with over half the participants achieving PASI 100 in both studies. The risankizumab trial findings were “among highest efficacy results reported to date, with impressive durability of response on and off drug,” Dr. Lebwohl said. “Preliminary safety is encouraging,” but “long-term data are required.”

Mirikizumab: Although not as far along in clinical trials, mirikizumab is another IL-23 inhibitor with “interesting and impressive preliminary results,” Dr. Lebwohl said. In a phase 2 trial of 205 participants whose baseline demographics indicated more severe psoriasis, 67% achieved PASI 90 at week 16 with a 300-mg dose (administered every 8 weeks). Doses of 100 mg and 30 mg resulted in 59% and 29% of participants achieving PASI 90 at week 16.

“The most common treatment emergent adverse events included upper respiratory tract infection [including viral], injection site pain, hypertension and diarrhea,” Dr. Lebwohl said. Patients are now being recruited for two phase 3 studies of mirikizumab (OASIS-1 and OASIS-2).

Certolizumab pegol: Certolizumab pegol is a tumor necrosis factor blocker approved in 2013 for treatment of psoriatic arthritis, and for moderate to severe plaque psoriasis in May 2018. In a pooled data analysis of three phase 3 trials (CIMPASI-1, CIMPASI-2, and CIMPACT), 52.3% of participants taking 400 mg subcutaneously every 2 weeks and 44.5% of those taking 200 mg every 2 weeks achieved PASI 90 at week 16, compared with 1.6% of those on placebo. In addition, a trial evaluating maternal transfer of certolizumab to the fetus via placenta found minimal drug concentration levels in the umbilical cord and infant’s plasma. “Certolizumab is ideal for women of childbearing potential,” Dr. Lebwohl said after the meeting.

Bimekizumab: This is a dual inhibitor of IL-17A and IL-17F being studied for treatment of mild psoriasis but “is very promising for psoriatic arthritis, as well as psoriasis,” Dr. Lebwohl said. In the phase 2b BE ABLE 1 trial, up to 79% of patients receiving bimekizumab achieved PASI 90 at week 12, and up to 46% of psoriatic arthritis patients had at least a 50% improvement in joint symptoms, compared with 7% of those on placebo.

Dr. Lebwohl is a consultant for Allergan, Boehringer-Ingelheim, Leo and Promius Pharma, and is an employee of Mount Sinai, which receives research funds from Abbvie, Amgen, Boehringer Ingelheim, Celgene, Eli Lilly, Janssen/Johnson & Johnson, Kadmon, Medimmune/AstraZeneca, Novartis, Pfizer, and ViDac Pharma.

*Correction, 8/6/18: An earlier version of this article misstated the adverse event data for tildrakizumab.

An 11-step plan to encourage innovation and competition in the development of biosimilars has been announced by the Food and Drug Administration.

Some of the actions include tools to enhance public information about the FDA’s evaluation of biosimilars, including more information about approved biological products in the Purple Book; exploring the potential for entering into new data sharing agreements with foreign regulators to facilitate the increased use of non–U.S.-licensed comparator products in certain studies to support a biosimilar application; releasing a series of videos that explain key concepts about biosimilar and interchangeable products; and requesting information from the public on additional policy steps the FDA should consider for enhancing the biosimilar program.

The FDA’s Biosimilar Action Plan is available here.

[email protected]

An 11-step plan to encourage innovation and competition in the development of biosimilars has been announced by the Food and Drug Administration.

Some of the actions include tools to enhance public information about the FDA’s evaluation of biosimilars, including more information about approved biological products in the Purple Book; exploring the potential for entering into new data sharing agreements with foreign regulators to facilitate the increased use of non–U.S.-licensed comparator products in certain studies to support a biosimilar application; releasing a series of videos that explain key concepts about biosimilar and interchangeable products; and requesting information from the public on additional policy steps the FDA should consider for enhancing the biosimilar program.

The FDA’s Biosimilar Action Plan is available here.

[email protected]

An 11-step plan to encourage innovation and competition in the development of biosimilars has been announced by the Food and Drug Administration.

Some of the actions include tools to enhance public information about the FDA’s evaluation of biosimilars, including more information about approved biological products in the Purple Book; exploring the potential for entering into new data sharing agreements with foreign regulators to facilitate the increased use of non–U.S.-licensed comparator products in certain studies to support a biosimilar application; releasing a series of videos that explain key concepts about biosimilar and interchangeable products; and requesting information from the public on additional policy steps the FDA should consider for enhancing the biosimilar program.

The FDA’s Biosimilar Action Plan is available here.

[email protected]

A total of 82% of psoriasis patients achieved PASI 75 during long-term treatment with ixekizumab (Taltz), based on interim data from 120 patients followed over a 4-year extension of a randomized trial.

James Heilman, MD/Wikimedia Commons/CC BY-SA 3.0

Patients from a previous study of ixekizumab were treated with 120 mg at the start of the extension, and then 80 mg subcutaneously every 4 weeks, Claus Zachariae, MD, of the University Hospital of Copenhagen Gentofte, and his coauthors reported in the Journal of the American Academy of Dermatology.

At week 208, 82% of the patients achieved Psoriasis Area and Severity Index (PASI) 75, 65% achieved PASI 90, and 45% achieved PASI 100; 65% scored a 0 or 1 on the Physician’s Global Assessment Scale. In addition, 45% of patients reported a score of 0 on the Physician Global Assessment. Patients also reported a decrease in itching from baseline.

A total of 17% of patients experienced a serious adverse event and 87% of the patients experienced at least one treatment-related adverse event by the end of the 4-year extension period. Most of the reported events were mild to moderate; the most common were nasopharyngitis (23%), sinusitis (13%), upper respiratory tract infection (13%), and headache (10%).

The study findings were limited by several factors including the lack of blinding and lack of a placebo, the researchers noted.

However, the results demonstrate “that efficacy can be maintained at high levels for up to 4 years of ixekizumab therapy without apparent increases in health risks or safety issues,” for psoriasis patients, Dr. Zachariae and his associates said. “Longer treatment periods in larger numbers of patients will be reported for patients enrolled in the 5-year phase 3 ixekizumab studies.”

The study was supported by Eli Lilly. Dr. Zachariae disclosed relationships with Eli Lilly and other companies including Janssen, Novartis, AbbVie, and Amgen. His coauthors had financial relationships with multiple companies.

SOURCE: Zachariae C et al. J Am Acad Dermatol. 2018 Aug;79(2):294-301.e6.

A total of 82% of psoriasis patients achieved PASI 75 during long-term treatment with ixekizumab (Taltz), based on interim data from 120 patients followed over a 4-year extension of a randomized trial.

James Heilman, MD/Wikimedia Commons/CC BY-SA 3.0

Patients from a previous study of ixekizumab were treated with 120 mg at the start of the extension, and then 80 mg subcutaneously every 4 weeks, Claus Zachariae, MD, of the University Hospital of Copenhagen Gentofte, and his coauthors reported in the Journal of the American Academy of Dermatology.

At week 208, 82% of the patients achieved Psoriasis Area and Severity Index (PASI) 75, 65% achieved PASI 90, and 45% achieved PASI 100; 65% scored a 0 or 1 on the Physician’s Global Assessment Scale. In addition, 45% of patients reported a score of 0 on the Physician Global Assessment. Patients also reported a decrease in itching from baseline.

A total of 17% of patients experienced a serious adverse event and 87% of the patients experienced at least one treatment-related adverse event by the end of the 4-year extension period. Most of the reported events were mild to moderate; the most common were nasopharyngitis (23%), sinusitis (13%), upper respiratory tract infection (13%), and headache (10%).

The study findings were limited by several factors including the lack of blinding and lack of a placebo, the researchers noted.

However, the results demonstrate “that efficacy can be maintained at high levels for up to 4 years of ixekizumab therapy without apparent increases in health risks or safety issues,” for psoriasis patients, Dr. Zachariae and his associates said. “Longer treatment periods in larger numbers of patients will be reported for patients enrolled in the 5-year phase 3 ixekizumab studies.”

The study was supported by Eli Lilly. Dr. Zachariae disclosed relationships with Eli Lilly and other companies including Janssen, Novartis, AbbVie, and Amgen. His coauthors had financial relationships with multiple companies.

SOURCE: Zachariae C et al. J Am Acad Dermatol. 2018 Aug;79(2):294-301.e6.

A total of 82% of psoriasis patients achieved PASI 75 during long-term treatment with ixekizumab (Taltz), based on interim data from 120 patients followed over a 4-year extension of a randomized trial.

James Heilman, MD/Wikimedia Commons/CC BY-SA 3.0

Patients from a previous study of ixekizumab were treated with 120 mg at the start of the extension, and then 80 mg subcutaneously every 4 weeks, Claus Zachariae, MD, of the University Hospital of Copenhagen Gentofte, and his coauthors reported in the Journal of the American Academy of Dermatology.

At week 208, 82% of the patients achieved Psoriasis Area and Severity Index (PASI) 75, 65% achieved PASI 90, and 45% achieved PASI 100; 65% scored a 0 or 1 on the Physician’s Global Assessment Scale. In addition, 45% of patients reported a score of 0 on the Physician Global Assessment. Patients also reported a decrease in itching from baseline.

A total of 17% of patients experienced a serious adverse event and 87% of the patients experienced at least one treatment-related adverse event by the end of the 4-year extension period. Most of the reported events were mild to moderate; the most common were nasopharyngitis (23%), sinusitis (13%), upper respiratory tract infection (13%), and headache (10%).

The study findings were limited by several factors including the lack of blinding and lack of a placebo, the researchers noted.

However, the results demonstrate “that efficacy can be maintained at high levels for up to 4 years of ixekizumab therapy without apparent increases in health risks or safety issues,” for psoriasis patients, Dr. Zachariae and his associates said. “Longer treatment periods in larger numbers of patients will be reported for patients enrolled in the 5-year phase 3 ixekizumab studies.”

The study was supported by Eli Lilly. Dr. Zachariae disclosed relationships with Eli Lilly and other companies including Janssen, Novartis, AbbVie, and Amgen. His coauthors had financial relationships with multiple companies.

SOURCE: Zachariae C et al. J Am Acad Dermatol. 2018 Aug;79(2):294-301.e6.

Case Report

A 19-year-old man first presented to our outpatient dermatology clinic for evaluation of a rash on the elbows and knees of 2 to 3 months’ duration. The lesions were asymptomatic. A review of symptoms including joint pain was largely negative. His medical history was remarkable for terminal ileitis, Crohn disease, anal fissure, rhabdomyolysis, and viral gastroenteritis. Physical examination revealed a well-nourished man with red, scaly, indurated papules and plaques involving approximately 0.5% of the body surface area. A diagnosis of plaque psoriasis was made, and he was treated with topical corticosteroids for 2 weeks and as needed thereafter.

The patient remained stable for 5 years before presenting again to the dermatology clinic for psoriasis that had now spread to the scalp. Clinical examination revealed a very thin, faintly erythematous, scaly patch associated with increased hair density of the right frontal and parietal scalp (Figure). The patient denied any trauma or injury to the area or application of hair dye. We prescribed clobetasol solution 0.05% twice daily to the affected area of the scalp for 2 weeks, which resulted in minimal resolution of the psoriatic scalp lesion.

Comment

The scalp is a site of predilection in psoriasis, as approximately 80% of psoriasis patients report involvement of the scalp.¹ Scalp involvement can dramatically affect a patient’s quality of life and often poses considerable therapeutic challenges for dermatologists.¹ Alopecia in the setting of scalp psoriasis is common but is not well understood.² First described by Shuster³ in 1972, psoriatic alopecia is associated with diminished hair density, follicular miniaturization, sebaceous gland atrophy, and an increased number of dystrophic bulbs in psoriatic plaques.⁴ It clinically presents as pink scaly plaques consistent with psoriasis with overlying alopecia. There are few instances of psoriatic alopecia reported as cicatricial hair loss and generalized telogen effluvium.² It is known that a higher proportion of telogen and catagen hairs exist in patients with psoriatic alopecia.⁵ Additionally, psoriasis patients have more dystrophic hairs in affected and unaffected skin despite no differences in skin when compared to unaffected patients. Many patients achieve hair regrowth following treatment of psoriasis.²

We described a patient with scalp psoriasis who had increased and preserved hair density. Our case suggests that while most patients with scalp psoriasis experience psoriatic alopecia of the lesional skin, some may unconventionally experience increased hair density, which is contradictory to propositions that the friction associated with the application of topical treatments results in breakage of telogen hairs.² Additionally, the presence of increased hair density in scalp psoriasis can further complicate antipsoriatic treatment by making the scalp inaccessible and topical therapies even more difficult to apply.

Case Report

A 19-year-old man first presented to our outpatient dermatology clinic for evaluation of a rash on the elbows and knees of 2 to 3 months’ duration. The lesions were asymptomatic. A review of symptoms including joint pain was largely negative. His medical history was remarkable for terminal ileitis, Crohn disease, anal fissure, rhabdomyolysis, and viral gastroenteritis. Physical examination revealed a well-nourished man with red, scaly, indurated papules and plaques involving approximately 0.5% of the body surface area. A diagnosis of plaque psoriasis was made, and he was treated with topical corticosteroids for 2 weeks and as needed thereafter.

The patient remained stable for 5 years before presenting again to the dermatology clinic for psoriasis that had now spread to the scalp. Clinical examination revealed a very thin, faintly erythematous, scaly patch associated with increased hair density of the right frontal and parietal scalp (Figure). The patient denied any trauma or injury to the area or application of hair dye. We prescribed clobetasol solution 0.05% twice daily to the affected area of the scalp for 2 weeks, which resulted in minimal resolution of the psoriatic scalp lesion.

Comment

The scalp is a site of predilection in psoriasis, as approximately 80% of psoriasis patients report involvement of the scalp.¹ Scalp involvement can dramatically affect a patient’s quality of life and often poses considerable therapeutic challenges for dermatologists.¹ Alopecia in the setting of scalp psoriasis is common but is not well understood.² First described by Shuster³ in 1972, psoriatic alopecia is associated with diminished hair density, follicular miniaturization, sebaceous gland atrophy, and an increased number of dystrophic bulbs in psoriatic plaques.⁴ It clinically presents as pink scaly plaques consistent with psoriasis with overlying alopecia. There are few instances of psoriatic alopecia reported as cicatricial hair loss and generalized telogen effluvium.² It is known that a higher proportion of telogen and catagen hairs exist in patients with psoriatic alopecia.⁵ Additionally, psoriasis patients have more dystrophic hairs in affected and unaffected skin despite no differences in skin when compared to unaffected patients. Many patients achieve hair regrowth following treatment of psoriasis.²

We described a patient with scalp psoriasis who had increased and preserved hair density. Our case suggests that while most patients with scalp psoriasis experience psoriatic alopecia of the lesional skin, some may unconventionally experience increased hair density, which is contradictory to propositions that the friction associated with the application of topical treatments results in breakage of telogen hairs.² Additionally, the presence of increased hair density in scalp psoriasis can further complicate antipsoriatic treatment by making the scalp inaccessible and topical therapies even more difficult to apply.

Case Report

A 19-year-old man first presented to our outpatient dermatology clinic for evaluation of a rash on the elbows and knees of 2 to 3 months’ duration. The lesions were asymptomatic. A review of symptoms including joint pain was largely negative. His medical history was remarkable for terminal ileitis, Crohn disease, anal fissure, rhabdomyolysis, and viral gastroenteritis. Physical examination revealed a well-nourished man with red, scaly, indurated papules and plaques involving approximately 0.5% of the body surface area. A diagnosis of plaque psoriasis was made, and he was treated with topical corticosteroids for 2 weeks and as needed thereafter.

The patient remained stable for 5 years before presenting again to the dermatology clinic for psoriasis that had now spread to the scalp. Clinical examination revealed a very thin, faintly erythematous, scaly patch associated with increased hair density of the right frontal and parietal scalp (Figure). The patient denied any trauma or injury to the area or application of hair dye. We prescribed clobetasol solution 0.05% twice daily to the affected area of the scalp for 2 weeks, which resulted in minimal resolution of the psoriatic scalp lesion.

Comment

The scalp is a site of predilection in psoriasis, as approximately 80% of psoriasis patients report involvement of the scalp.¹ Scalp involvement can dramatically affect a patient’s quality of life and often poses considerable therapeutic challenges for dermatologists.¹ Alopecia in the setting of scalp psoriasis is common but is not well understood.² First described by Shuster³ in 1972, psoriatic alopecia is associated with diminished hair density, follicular miniaturization, sebaceous gland atrophy, and an increased number of dystrophic bulbs in psoriatic plaques.⁴ It clinically presents as pink scaly plaques consistent with psoriasis with overlying alopecia. There are few instances of psoriatic alopecia reported as cicatricial hair loss and generalized telogen effluvium.² It is known that a higher proportion of telogen and catagen hairs exist in patients with psoriatic alopecia.⁵ Additionally, psoriasis patients have more dystrophic hairs in affected and unaffected skin despite no differences in skin when compared to unaffected patients. Many patients achieve hair regrowth following treatment of psoriasis.²

We described a patient with scalp psoriasis who had increased and preserved hair density. Our case suggests that while most patients with scalp psoriasis experience psoriatic alopecia of the lesional skin, some may unconventionally experience increased hair density, which is contradictory to propositions that the friction associated with the application of topical treatments results in breakage of telogen hairs.² Additionally, the presence of increased hair density in scalp psoriasis can further complicate antipsoriatic treatment by making the scalp inaccessible and topical therapies even more difficult to apply.

Researching medical information currently is the third most common use of the Internet in the United States,¹ with the majority of adults using the Web as their first source for health information before seeing a physician.² When assessing health-related information online, resources can be grouped into 4 categories: (1) those attributed to self-proclaimed experts, (2) promotional, (3) social media, and (4) educational.³ Access to such a wide range of sources may give readers the opportunity to share personal anecdotes and opinions, thereby serving as a forum for information that essentially cannot be validated. Although such websites may include useful information and cite current literature, in other instances health-related information may be misleading or fabricated.³

In a study evaluating 291 skin conditions and related Google trends, acne, psoriasis, and eczema were among the most burdensome diseases, with acne yielding the highest number of search results.⁴ Results of the study indicated a positive correlation between disease burden and online search interest.⁴ The impact of these online searches and the validity of Google search results are topics worth considering, as more dermatology patients are relying on holistic and nonpharmaceutical approaches to treatment and disease management.⁵ The purpose of this study was to evaluate content on diet and dermatology available on the Internet for acne, psoriasis, and eczema.

Methods

Google searches were performed in December 2017 using the terms diet and acne, diet and psoriasis, and diet and eczema. The first 10 results for each respective search were reviewed for recommendations about which foods to incorporate in the diet and which to avoid. They also were classified according to the following 4 website categories: (1) those attributed to self-proclaimed experts, (2) promotional, (3) social media, and (4) educational. The recommendations gathered from the 30 websites were then compared to the current literature assessing the impact of diet on these respective conditions by conducting PubMed searches of articles indexed for MEDLINE using the same terms.

Results

The results of this study are outlined in the eTable.

Acne
Our Google search using the term diet and acne produced 17,500,000 results. Of the first 10 search results, 40% (4/10) were websites attributed to self-proclaimed experts, 40% (4/10) were educational resources, and 20% (2/10) were promotional websites. Most of the websites advised acne patients to avoid high glycemic index foods (90% [9/10]) and dairy products (90% [9/10]). When discussing which foods to include in the diet, 70% (7/10) of websites recommended that patients incorporate omega-3 fatty acids and antioxidants in the diet.

Research has shown that a low glycemic index diet can lead to a decrease in patients’ acne lesion counts in some instances.^6,7 In a case-controlled study of 2258 patients on a popular weight loss diet that emphasized low glycemic index foods, 87% of participants reported a reduction in acne and 91% reported a decrease in their dosage or number of acne medications.⁷ Still, the exact correlation between acne development and consumption of glycemic index foods has not been confirmed. However, high glycemic index diets have been linked to hyperinsulinemia, indicating that insulin levels may play a role in acne formation.⁸ The majority of other currently available studies evaluated the potential link between dairy consumption and acne. A retrospective analysis of 47,355 women spanning 12 weeks showed a positive link between increased dairy consumption, specifically skim milk, and acne formation. Despite the positive trend, limitations such as recall bias made it difficult to draw a conclusion based on these findings.⁹ However, results of a longitudinal questionnaire-based population study evaluating the impact of dairy consumption on acne in 2489 adolescent patients confirmed a positive correlation.¹⁰ Studies conducted in 2009 and 2011 concluded that milk consumption results in elevated insulinlike growth factor 1 levels, which were linked to comedogenesis.^8,11

Currently, there are well-described mechanisms to explain the association of dairy consumption and glycemic index with acne. Confirming a correlation between acne development and dairy consumption suggests that a dairy-free diet may benefit acne patients.⁵ Other trials indicate that low glycemic index diets are beneficial in treating acne.^6,7 Therefore, some of the recommendations made in our search results may be of merit; however, there is minimal evidence proving the benefits of the other dietary recommendations made in the websites we evaluated.

Psoriasis
Our Google search using the term diet and psoriasis yielded a total of 9,420,000 results. Of the first 10 search results, 40% (4/10) were websites attributed to self-proclaimed experts, 30% (3/10) were promotional, and 30% (3/10) were educational. Seventy percent (7/10) of websites recommended avoiding alcohol and 60% (6/10) recommended avoiding gluten, with others discouraging consumption of red meat. Most of the websites encouraged patients to consume omega-3 fatty acids and antioxidants, while a few also recommended vitamins A, D, and E, as well as evening primrose oil supplements.

Although current research indicates a positive correlation between excessive alcohol use and psoriasis severity, it is still unclear whether alcohol consumption can be directly linked to the disease.^12-14 Likewise, despite belief that increased oxidative stress likely contributes to inflammation in psoriasis, there is little evidence linking antioxidants to improvement in psoriasis symptoms.¹² However, the current literature is inconsistent regarding the effects of fish oil supplementation on psoriasis.¹² In a randomized double-blind study of 145 patients, there was no significant difference in psoriasis area and severity index scores between a control group and a treatment group receiving fish oil supplementation.¹⁵ In another RCT of 45 participants, those given daily very long-chain omega-3 fatty acid supplements saw no difference in psoriasis symptoms.¹⁵ Despite debate, literature assessing the impact of gluten-free diets has described improvement in psoriasis lesions in patients with celiac-specific antibodies.¹⁶ Although some observational studies described vitamin D supplementation to be beneficial in the treatment of psoriatic lesions, a more recent RCT found no significant difference between control and treatment groups.^17-19

Studies also have revealed that certain eating patterns, such as those associated with the Mediterranean diet that is rich in fruits, vegetables, whole grains, and omega-3 fatty acids may be linked to improved endothelial function scores and reduced C-reactive protein and IL-18levels.^20,21 In a double-blind RCT of 75 patients with plaque psoriasis, mean (SD) psoriasis area and severity index scores decreased by 11.2 (9.8) in a group treated with omega-3 fatty acids compared to 7.5 (8.8) with omega-6 fatty acids (P=.048).²²

Although excessive alcohol use may be linked to psoriasis, there is no conclusive evidence indicating causation, thereby discrediting online claims.^12-14 Research has revealed that gluten-free diets in psoriasis patients with celiac disease may improve psoriasis treatment¹⁶; however, sufficient evidence is lacking for diets low in gluten and high in polyunsaturated fatty acids or antioxidant supplementation. Of the dietary supplements recommended in the search results we reviewed, fish oil appears to be the most promising, but no recommendations can be made based on the current research.

Eczema
Our Google search using the term diet and eczema yielded 1,160,000 results, with 50% (5/10) of websites attributed to self-proclaimed experts, 30% (3/10) to educational websites, and 20% (2/10) to promotional sites. Of the first 10 results, 80% (8/10) recommended that patients with eczema avoid milk/dairy and 50% (5/10) advised to avoid soy and wheat/gluten. Other websites indicated to avoid eggs, nuts, and artificial sweeteners. Patients were encouraged to incorporate omega-3 fatty acids in their diets, and a few sites recommended bananas, coconut oil, olive oil, and various teas.

In a review of 11 studies with a total of 596 participants, supplementation with vitamins D and E, fish oil, olive oil, and linoleic acid was evaluated for the treatment of eczema.²³ Although results indicated modest improvement of eczema severity with supplementation of fish oil, evidence favoring this treatment is limited and unconvincing. Furthermore, some evidence indicates that elimination diets are only appropriate for patients with food allergies.²⁴ In a study evaluating an egg-free and dairy-free diet for eczema patients, only participants with positive egg-specific serum IgE levels saw improvement in disease severity.²³ Even though IgE-mediated food allergies have been reported in 40% of children with moderate eczema, the contribution of these allergies to eczema is questionable.²⁵

There is little evidence in the literature to indicate a definitive correlation between the foods mentioned in the search results we evaluated and the development of eczema; however, for patients with food allergies and eczema, elimination diets may decrease disease severity.^25,26 There is insufficient evidence to suggest a benefit from evening primrose oil or fish oil supplementation, thereby debunking claims found online.

Comment

Although our Google search results included a wide range of sources and information regarding diet and dermatologic conditions such as acne, psoriasis, and eczema, most of the information we found was either unfounded or misleading. Study limitations in the current literature include small sample size, potential recall bias, lack of appropriate controls, incomplete reported results, and the failure to clearly define skin changes.

When considering the accuracy and type of information regarding skin conditions that is available on the Internet, it is important to note that most of the results we reviewed were webpages attributed to self-proclaimed experts. Although educational websites also were included in the search results, whether or not patients prefer or understand the content of such websites is still unknown; therefore, health organizations should consider revising online patient education materials to allow universal comprehension.²⁷

Furthermore, it is important to consider the impact that widespread Internet access may have on the physician-patient relationship. Having access to health-related information online and being able to potentially self-diagnose could delay or deter patients from seeking professional advice or care.³ A study evaluating the impact of online searches on the physician-patient relationship among 175 patients determined that 36.5% of patients gathered information online prior to their consultation with a physician, while 67.3% chose to complement the information given to them by their physician with online resources.²⁸ Based on these statistics, it is important that physicians be up-to-date with Internet discourse to discredit unfounded recommendations. Ultimately, when it comes to diet and dermatology, patients ought to be skeptical of the information currently available on the Internet, given that most of it is unsubstantiated by medical research.

Researching medical information currently is the third most common use of the Internet in the United States,¹ with the majority of adults using the Web as their first source for health information before seeing a physician.² When assessing health-related information online, resources can be grouped into 4 categories: (1) those attributed to self-proclaimed experts, (2) promotional, (3) social media, and (4) educational.³ Access to such a wide range of sources may give readers the opportunity to share personal anecdotes and opinions, thereby serving as a forum for information that essentially cannot be validated. Although such websites may include useful information and cite current literature, in other instances health-related information may be misleading or fabricated.³

In a study evaluating 291 skin conditions and related Google trends, acne, psoriasis, and eczema were among the most burdensome diseases, with acne yielding the highest number of search results.⁴ Results of the study indicated a positive correlation between disease burden and online search interest.⁴ The impact of these online searches and the validity of Google search results are topics worth considering, as more dermatology patients are relying on holistic and nonpharmaceutical approaches to treatment and disease management.⁵ The purpose of this study was to evaluate content on diet and dermatology available on the Internet for acne, psoriasis, and eczema.

Methods

Google searches were performed in December 2017 using the terms diet and acne, diet and psoriasis, and diet and eczema. The first 10 results for each respective search were reviewed for recommendations about which foods to incorporate in the diet and which to avoid. They also were classified according to the following 4 website categories: (1) those attributed to self-proclaimed experts, (2) promotional, (3) social media, and (4) educational. The recommendations gathered from the 30 websites were then compared to the current literature assessing the impact of diet on these respective conditions by conducting PubMed searches of articles indexed for MEDLINE using the same terms.

Results

The results of this study are outlined in the eTable.

Acne
Our Google search using the term diet and acne produced 17,500,000 results. Of the first 10 search results, 40% (4/10) were websites attributed to self-proclaimed experts, 40% (4/10) were educational resources, and 20% (2/10) were promotional websites. Most of the websites advised acne patients to avoid high glycemic index foods (90% [9/10]) and dairy products (90% [9/10]). When discussing which foods to include in the diet, 70% (7/10) of websites recommended that patients incorporate omega-3 fatty acids and antioxidants in the diet.

Research has shown that a low glycemic index diet can lead to a decrease in patients’ acne lesion counts in some instances.^6,7 In a case-controlled study of 2258 patients on a popular weight loss diet that emphasized low glycemic index foods, 87% of participants reported a reduction in acne and 91% reported a decrease in their dosage or number of acne medications.⁷ Still, the exact correlation between acne development and consumption of glycemic index foods has not been confirmed. However, high glycemic index diets have been linked to hyperinsulinemia, indicating that insulin levels may play a role in acne formation.⁸ The majority of other currently available studies evaluated the potential link between dairy consumption and acne. A retrospective analysis of 47,355 women spanning 12 weeks showed a positive link between increased dairy consumption, specifically skim milk, and acne formation. Despite the positive trend, limitations such as recall bias made it difficult to draw a conclusion based on these findings.⁹ However, results of a longitudinal questionnaire-based population study evaluating the impact of dairy consumption on acne in 2489 adolescent patients confirmed a positive correlation.¹⁰ Studies conducted in 2009 and 2011 concluded that milk consumption results in elevated insulinlike growth factor 1 levels, which were linked to comedogenesis.^8,11

Currently, there are well-described mechanisms to explain the association of dairy consumption and glycemic index with acne. Confirming a correlation between acne development and dairy consumption suggests that a dairy-free diet may benefit acne patients.⁵ Other trials indicate that low glycemic index diets are beneficial in treating acne.^6,7 Therefore, some of the recommendations made in our search results may be of merit; however, there is minimal evidence proving the benefits of the other dietary recommendations made in the websites we evaluated.

Psoriasis
Our Google search using the term diet and psoriasis yielded a total of 9,420,000 results. Of the first 10 search results, 40% (4/10) were websites attributed to self-proclaimed experts, 30% (3/10) were promotional, and 30% (3/10) were educational. Seventy percent (7/10) of websites recommended avoiding alcohol and 60% (6/10) recommended avoiding gluten, with others discouraging consumption of red meat. Most of the websites encouraged patients to consume omega-3 fatty acids and antioxidants, while a few also recommended vitamins A, D, and E, as well as evening primrose oil supplements.

Although current research indicates a positive correlation between excessive alcohol use and psoriasis severity, it is still unclear whether alcohol consumption can be directly linked to the disease.^12-14 Likewise, despite belief that increased oxidative stress likely contributes to inflammation in psoriasis, there is little evidence linking antioxidants to improvement in psoriasis symptoms.¹² However, the current literature is inconsistent regarding the effects of fish oil supplementation on psoriasis.¹² In a randomized double-blind study of 145 patients, there was no significant difference in psoriasis area and severity index scores between a control group and a treatment group receiving fish oil supplementation.¹⁵ In another RCT of 45 participants, those given daily very long-chain omega-3 fatty acid supplements saw no difference in psoriasis symptoms.¹⁵ Despite debate, literature assessing the impact of gluten-free diets has described improvement in psoriasis lesions in patients with celiac-specific antibodies.¹⁶ Although some observational studies described vitamin D supplementation to be beneficial in the treatment of psoriatic lesions, a more recent RCT found no significant difference between control and treatment groups.^17-19

Studies also have revealed that certain eating patterns, such as those associated with the Mediterranean diet that is rich in fruits, vegetables, whole grains, and omega-3 fatty acids may be linked to improved endothelial function scores and reduced C-reactive protein and IL-18levels.^20,21 In a double-blind RCT of 75 patients with plaque psoriasis, mean (SD) psoriasis area and severity index scores decreased by 11.2 (9.8) in a group treated with omega-3 fatty acids compared to 7.5 (8.8) with omega-6 fatty acids (P=.048).²²

Although excessive alcohol use may be linked to psoriasis, there is no conclusive evidence indicating causation, thereby discrediting online claims.^12-14 Research has revealed that gluten-free diets in psoriasis patients with celiac disease may improve psoriasis treatment¹⁶; however, sufficient evidence is lacking for diets low in gluten and high in polyunsaturated fatty acids or antioxidant supplementation. Of the dietary supplements recommended in the search results we reviewed, fish oil appears to be the most promising, but no recommendations can be made based on the current research.

Eczema
Our Google search using the term diet and eczema yielded 1,160,000 results, with 50% (5/10) of websites attributed to self-proclaimed experts, 30% (3/10) to educational websites, and 20% (2/10) to promotional sites. Of the first 10 results, 80% (8/10) recommended that patients with eczema avoid milk/dairy and 50% (5/10) advised to avoid soy and wheat/gluten. Other websites indicated to avoid eggs, nuts, and artificial sweeteners. Patients were encouraged to incorporate omega-3 fatty acids in their diets, and a few sites recommended bananas, coconut oil, olive oil, and various teas.

In a review of 11 studies with a total of 596 participants, supplementation with vitamins D and E, fish oil, olive oil, and linoleic acid was evaluated for the treatment of eczema.²³ Although results indicated modest improvement of eczema severity with supplementation of fish oil, evidence favoring this treatment is limited and unconvincing. Furthermore, some evidence indicates that elimination diets are only appropriate for patients with food allergies.²⁴ In a study evaluating an egg-free and dairy-free diet for eczema patients, only participants with positive egg-specific serum IgE levels saw improvement in disease severity.²³ Even though IgE-mediated food allergies have been reported in 40% of children with moderate eczema, the contribution of these allergies to eczema is questionable.²⁵

There is little evidence in the literature to indicate a definitive correlation between the foods mentioned in the search results we evaluated and the development of eczema; however, for patients with food allergies and eczema, elimination diets may decrease disease severity.^25,26 There is insufficient evidence to suggest a benefit from evening primrose oil or fish oil supplementation, thereby debunking claims found online.

Comment

Although our Google search results included a wide range of sources and information regarding diet and dermatologic conditions such as acne, psoriasis, and eczema, most of the information we found was either unfounded or misleading. Study limitations in the current literature include small sample size, potential recall bias, lack of appropriate controls, incomplete reported results, and the failure to clearly define skin changes.

When considering the accuracy and type of information regarding skin conditions that is available on the Internet, it is important to note that most of the results we reviewed were webpages attributed to self-proclaimed experts. Although educational websites also were included in the search results, whether or not patients prefer or understand the content of such websites is still unknown; therefore, health organizations should consider revising online patient education materials to allow universal comprehension.²⁷

Furthermore, it is important to consider the impact that widespread Internet access may have on the physician-patient relationship. Having access to health-related information online and being able to potentially self-diagnose could delay or deter patients from seeking professional advice or care.³ A study evaluating the impact of online searches on the physician-patient relationship among 175 patients determined that 36.5% of patients gathered information online prior to their consultation with a physician, while 67.3% chose to complement the information given to them by their physician with online resources.²⁸ Based on these statistics, it is important that physicians be up-to-date with Internet discourse to discredit unfounded recommendations. Ultimately, when it comes to diet and dermatology, patients ought to be skeptical of the information currently available on the Internet, given that most of it is unsubstantiated by medical research.

Researching medical information currently is the third most common use of the Internet in the United States,¹ with the majority of adults using the Web as their first source for health information before seeing a physician.² When assessing health-related information online, resources can be grouped into 4 categories: (1) those attributed to self-proclaimed experts, (2) promotional, (3) social media, and (4) educational.³ Access to such a wide range of sources may give readers the opportunity to share personal anecdotes and opinions, thereby serving as a forum for information that essentially cannot be validated. Although such websites may include useful information and cite current literature, in other instances health-related information may be misleading or fabricated.³

In a study evaluating 291 skin conditions and related Google trends, acne, psoriasis, and eczema were among the most burdensome diseases, with acne yielding the highest number of search results.⁴ Results of the study indicated a positive correlation between disease burden and online search interest.⁴ The impact of these online searches and the validity of Google search results are topics worth considering, as more dermatology patients are relying on holistic and nonpharmaceutical approaches to treatment and disease management.⁵ The purpose of this study was to evaluate content on diet and dermatology available on the Internet for acne, psoriasis, and eczema.

Methods

Google searches were performed in December 2017 using the terms diet and acne, diet and psoriasis, and diet and eczema. The first 10 results for each respective search were reviewed for recommendations about which foods to incorporate in the diet and which to avoid. They also were classified according to the following 4 website categories: (1) those attributed to self-proclaimed experts, (2) promotional, (3) social media, and (4) educational. The recommendations gathered from the 30 websites were then compared to the current literature assessing the impact of diet on these respective conditions by conducting PubMed searches of articles indexed for MEDLINE using the same terms.

Results

The results of this study are outlined in the eTable.

Acne
Our Google search using the term diet and acne produced 17,500,000 results. Of the first 10 search results, 40% (4/10) were websites attributed to self-proclaimed experts, 40% (4/10) were educational resources, and 20% (2/10) were promotional websites. Most of the websites advised acne patients to avoid high glycemic index foods (90% [9/10]) and dairy products (90% [9/10]). When discussing which foods to include in the diet, 70% (7/10) of websites recommended that patients incorporate omega-3 fatty acids and antioxidants in the diet.

Research has shown that a low glycemic index diet can lead to a decrease in patients’ acne lesion counts in some instances.^6,7 In a case-controlled study of 2258 patients on a popular weight loss diet that emphasized low glycemic index foods, 87% of participants reported a reduction in acne and 91% reported a decrease in their dosage or number of acne medications.⁷ Still, the exact correlation between acne development and consumption of glycemic index foods has not been confirmed. However, high glycemic index diets have been linked to hyperinsulinemia, indicating that insulin levels may play a role in acne formation.⁸ The majority of other currently available studies evaluated the potential link between dairy consumption and acne. A retrospective analysis of 47,355 women spanning 12 weeks showed a positive link between increased dairy consumption, specifically skim milk, and acne formation. Despite the positive trend, limitations such as recall bias made it difficult to draw a conclusion based on these findings.⁹ However, results of a longitudinal questionnaire-based population study evaluating the impact of dairy consumption on acne in 2489 adolescent patients confirmed a positive correlation.¹⁰ Studies conducted in 2009 and 2011 concluded that milk consumption results in elevated insulinlike growth factor 1 levels, which were linked to comedogenesis.^8,11

Currently, there are well-described mechanisms to explain the association of dairy consumption and glycemic index with acne. Confirming a correlation between acne development and dairy consumption suggests that a dairy-free diet may benefit acne patients.⁵ Other trials indicate that low glycemic index diets are beneficial in treating acne.^6,7 Therefore, some of the recommendations made in our search results may be of merit; however, there is minimal evidence proving the benefits of the other dietary recommendations made in the websites we evaluated.

Psoriasis
Our Google search using the term diet and psoriasis yielded a total of 9,420,000 results. Of the first 10 search results, 40% (4/10) were websites attributed to self-proclaimed experts, 30% (3/10) were promotional, and 30% (3/10) were educational. Seventy percent (7/10) of websites recommended avoiding alcohol and 60% (6/10) recommended avoiding gluten, with others discouraging consumption of red meat. Most of the websites encouraged patients to consume omega-3 fatty acids and antioxidants, while a few also recommended vitamins A, D, and E, as well as evening primrose oil supplements.

Although current research indicates a positive correlation between excessive alcohol use and psoriasis severity, it is still unclear whether alcohol consumption can be directly linked to the disease.^12-14 Likewise, despite belief that increased oxidative stress likely contributes to inflammation in psoriasis, there is little evidence linking antioxidants to improvement in psoriasis symptoms.¹² However, the current literature is inconsistent regarding the effects of fish oil supplementation on psoriasis.¹² In a randomized double-blind study of 145 patients, there was no significant difference in psoriasis area and severity index scores between a control group and a treatment group receiving fish oil supplementation.¹⁵ In another RCT of 45 participants, those given daily very long-chain omega-3 fatty acid supplements saw no difference in psoriasis symptoms.¹⁵ Despite debate, literature assessing the impact of gluten-free diets has described improvement in psoriasis lesions in patients with celiac-specific antibodies.¹⁶ Although some observational studies described vitamin D supplementation to be beneficial in the treatment of psoriatic lesions, a more recent RCT found no significant difference between control and treatment groups.^17-19

Studies also have revealed that certain eating patterns, such as those associated with the Mediterranean diet that is rich in fruits, vegetables, whole grains, and omega-3 fatty acids may be linked to improved endothelial function scores and reduced C-reactive protein and IL-18levels.^20,21 In a double-blind RCT of 75 patients with plaque psoriasis, mean (SD) psoriasis area and severity index scores decreased by 11.2 (9.8) in a group treated with omega-3 fatty acids compared to 7.5 (8.8) with omega-6 fatty acids (P=.048).²²

Although excessive alcohol use may be linked to psoriasis, there is no conclusive evidence indicating causation, thereby discrediting online claims.^12-14 Research has revealed that gluten-free diets in psoriasis patients with celiac disease may improve psoriasis treatment¹⁶; however, sufficient evidence is lacking for diets low in gluten and high in polyunsaturated fatty acids or antioxidant supplementation. Of the dietary supplements recommended in the search results we reviewed, fish oil appears to be the most promising, but no recommendations can be made based on the current research.

Eczema
Our Google search using the term diet and eczema yielded 1,160,000 results, with 50% (5/10) of websites attributed to self-proclaimed experts, 30% (3/10) to educational websites, and 20% (2/10) to promotional sites. Of the first 10 results, 80% (8/10) recommended that patients with eczema avoid milk/dairy and 50% (5/10) advised to avoid soy and wheat/gluten. Other websites indicated to avoid eggs, nuts, and artificial sweeteners. Patients were encouraged to incorporate omega-3 fatty acids in their diets, and a few sites recommended bananas, coconut oil, olive oil, and various teas.

In a review of 11 studies with a total of 596 participants, supplementation with vitamins D and E, fish oil, olive oil, and linoleic acid was evaluated for the treatment of eczema.²³ Although results indicated modest improvement of eczema severity with supplementation of fish oil, evidence favoring this treatment is limited and unconvincing. Furthermore, some evidence indicates that elimination diets are only appropriate for patients with food allergies.²⁴ In a study evaluating an egg-free and dairy-free diet for eczema patients, only participants with positive egg-specific serum IgE levels saw improvement in disease severity.²³ Even though IgE-mediated food allergies have been reported in 40% of children with moderate eczema, the contribution of these allergies to eczema is questionable.²⁵

There is little evidence in the literature to indicate a definitive correlation between the foods mentioned in the search results we evaluated and the development of eczema; however, for patients with food allergies and eczema, elimination diets may decrease disease severity.^25,26 There is insufficient evidence to suggest a benefit from evening primrose oil or fish oil supplementation, thereby debunking claims found online.

Comment

Although our Google search results included a wide range of sources and information regarding diet and dermatologic conditions such as acne, psoriasis, and eczema, most of the information we found was either unfounded or misleading. Study limitations in the current literature include small sample size, potential recall bias, lack of appropriate controls, incomplete reported results, and the failure to clearly define skin changes.

When considering the accuracy and type of information regarding skin conditions that is available on the Internet, it is important to note that most of the results we reviewed were webpages attributed to self-proclaimed experts. Although educational websites also were included in the search results, whether or not patients prefer or understand the content of such websites is still unknown; therefore, health organizations should consider revising online patient education materials to allow universal comprehension.²⁷

Furthermore, it is important to consider the impact that widespread Internet access may have on the physician-patient relationship. Having access to health-related information online and being able to potentially self-diagnose could delay or deter patients from seeking professional advice or care.³ A study evaluating the impact of online searches on the physician-patient relationship among 175 patients determined that 36.5% of patients gathered information online prior to their consultation with a physician, while 67.3% chose to complement the information given to them by their physician with online resources.²⁸ Based on these statistics, it is important that physicians be up-to-date with Internet discourse to discredit unfounded recommendations. Ultimately, when it comes to diet and dermatology, patients ought to be skeptical of the information currently available on the Internet, given that most of it is unsubstantiated by medical research.