Red-brown lesions on the upper body

A 29-year-old white man presented to the dermatology clinic with multiple lesions on his left arm and shoulder. The lesions had been previously biopsied at an outside dermatology clinic.

The patient reported that the lesions were slightly tender to palpation, but he was otherwise asymptomatic. His medical history was unremarkable. The man's social history was noncontributory and his family history ...