Hemorrhagic acneiform lesions in a teenager as the initial presentation of granulomatosis with polyangiitis.

A 19-year-old girl presented with hemorrhagic acneiform lesions on the face for several months that was unresponsive to conventional acne treatment. A biopsy revealed a noninfectious suppurative granulomatous dermatitis with hemorrhage, possibly representing a ruptured folliculitis. A second biopsy revealed chronic granulomatous dermal inflammation and hemorrhage with foreign body giant cells non-infectious by stains.