Increased risk of severe course of pemphigus in patients with pemphigus-associated alopecia: a prospective observational study.

Abstract

Pemphigus-associated alopecia is considered rare, and has not been studied in detail. To evaluate the clinical and immunological characteristics of patients with pemphigus-associated alopecia. This prospective observational study included 80 consecutive patients with histopathologically and immunopathologically confirmed pemphigus, of whom 11 (13.8%) were found to have pemphigus-associated alopecia. Alopecia was observed in 11/52 patients with pemphigus and scalp involvement: [0/28 (35.7%) with pemphigus vulgaris and 1/24 (4.2%) with pemphigus foliaceus. The clinical and immunological characteristics of these patients were analysed. Patients with pemphigus-associated alopecia had a significantly higher Pemphigus Disease Area Index total activity score compared with patients who had no pemphigus-associated alopecia (21.8 ± 18.6 and 11.0 ± 20.5, respectively; P = 0.02). Mean serum anti-desmoglein (Dsg)1 antibody concentration was 141.8 ± 66.9 U/mL and 60.0 ± 52.6 U/mL, respectively (P = 0.03), and mean serum anti-Dsg3 concentration was 126.6 ± 36.7 U/mL and 67.4 ± 52.5 U/mL, respectively (P = 0.03). The values for achieving serological remission were 10% and 70%, respectively (P = 0.02). Pemphigus-associated alopecia is a marker of severe disease and a treatment-resistant disease course.