The Koebner phenomenon in seborrheic pemphigus

A 25-year-old female, who underwent Cesarean section six months earlier for fetal distress, was hospitalized for a rash initially localized on the Cesarean section, which then gradually spread. A clinical examination revealed good general condition but erythematous squamous and crusty lesions on the surgical scar (Fig. 1a), trunk (Fig. 1b), and back. Oily dander was also noted with erythema on the scalp (Fig. 1c). The mucous membranes and nails were without abnormality, and the Nikolsky sign was absent.