An unusual scrotal plaque and a history of nonmelanoma skin cancer

A 79-year-old white man with an extensive history of nonmelanoma skin cancer presents for a routine skin examination. During his visit, he asks to have a groin rash checked. For 1 to 2 years, he has been using over-the-counter and prescription antifungal and antibiotic creams for a presumed "jock itch." Recently, he has developed more discomfort and reports episodic, profuse ...