Report of Case The patient,1a young woman aged 18, was first seen on Feb. 13, 1956, complaining of an eruption and itching. She was originally examined at the New York Skin and Cancer Clinic at six months of age, when the mother was advised to postpone treatment until the patient reached the age of 16 years. Dermatologic Examination.— The patient presented on the left side of the base of the chest a fairly well-defined horizontal patch, triangular in shape, with the apex reaching the inframammary region. It measured 12.5 cm. at the base and 5 cm. along the bisecting line from the apex to the base. The lesion was solid, raised, with a rough surface, somewhat infiltrated, studded with verrucous growths, and narrowed at both ends of the base. Satellite patches extended towards the spine and to the lower border of the scapula. A half-dollar-sized similar nevoid