Bullous Pemphigoid in a Patient with Psoriasis Treated with Cydosporine

Abstract

The concomitant occurrence of psoriasis and bullous pemphigoid has been described previously, but the pathogenic mechanism of this relationship is still unknown. We describe a 34-year-old woman with a 22-year history of plaque-type psoriasis. On the third day of hospitalization, disseminated tense bullae developed on her neck and upper extremities. Histologic examination of biopsy specimen obtained from a vesicular lesion demonstrated a subepidermal blister. Direct immunofluorescence revealed IgG and C3 deposition in a linear pattern at the basement membrane zone. Both diseases were successfully treated with cyclosporine. However, the coexistence of these conditions represents a difficult therapeutic challenge. (Turkderm 2010; 44: 167-9)