Psoriatic Alopecia in a Patient With Crohn Disease: An Uncommon Manifestation of Tumor Necrosis Factor α Inhibitors.

Tumor necrosis factor α (TNF-α) inhibitors are used to treat multiple inflammatory diseases including rheumatoid arthritis, inflammatory bowel disease, and psoriasis, among others. This family of medications can cause various side effects, some as common as injection-site reactions and others as rare as the paradoxical induction of psoriasiform skin lesions. Alopecic plaques recently have been described as an uncommon adverse effect of the TNF-α inhibitors adalimumab and infliximab. We present the case of a 12-year-old girl treated with adalimumab for Crohn disease who developed an alopecic crusted plaque on the scalp 6 months after increasing the dose of the medication. Biopsies, special stains, and sterile cultures yielded a diagnosis of psoriatic alopecia secondary to TNF-α inhibitor. A literature review for similar cases found 24 additional patients presenting with similar findings, of which only 6 were part of the pediatric population.

Treatment of erythrodermic psoriasis with biologics: A systematic review.

BACKGROUND: Biologic medications for plaque psoriasis have been used to treat erythrodermic psoriasis (EP). Since the guidelines for management of EP were published, new biologic medications have been approved for the treatment of plaque psoriasis. OBJECTIVE: To analyze the evidence of biologic medications in the treatment of EP based on response and tolerability. METHODS: A comprehensive search was conducted with the PubMed, Cochrane Library, Embase, and Scopus databases through December 31, 2018. Studies reporting 1 or more cases of EP, defined as >75% body surface area involvement, in patients aged ≥18 years treated with biologics were included. Baseline Psoriasis Area and Severity Index score, score improvement, and adverse events were documented. Adequate response to treatment was defined as Psoriasis Area and Severity Index ≥50. RESULTS: Included were 43 articles, yielding a total of 179 patients. Most patients responded at some point during treatment, with a higher level of evidence for infliximab, ustekinumab, ixekizumab, and guselkumab. Infection was the most common adverse event (n = 35). LIMITATIONS: Data are limited to case reports, case series, and uncontrolled studies. CONCLUSION: Patients with EP treated with biologics demonstrated positive responses and treatment was well-tolerated, with a weak recommendation and limited quality of evidence in favor of infliximab, ustekinumab, ixekizumab, and guselkumab.