Double skin tumors with an atypical clinical picture.

The authors present a rare case of double skin tumors: acral lentiginous melanoma and metatypical carcinoma. The tumors were manifested as gradually enlarging ulcerations on the leg and sole of the foot that did not respond to standard treatment. The skin biopsies showed advanced acral lentiginous melanoma on the sole and metatypical carcinoma of the lower leg. Soon after the diagnosis was made, the melanoma generalized. The article discusses the differential diagnosis of both leg ulcerations, correct diagnostic procedures, and characteristic features of both tumors that are important questions for general practitioners, dermatologists, and surgeons.