A case of dermatofibrosarcoma protuberans on the right first toe.

Reports of dermatofibrosarcoma protuberans on a toe are extremely rare. It frequently occurs on the trunk and extremities. A Japanese woman presented with a dark-brownish hyperkeratotic plaque on the dorsal skin of her first toe. The initial clinical diagnosis of verruca vulgaris prompted treatment with cryotherapy. After that a glossy milky-white tumor appeared. Only the results of the histopathologic examination resulted in a diagnosis of dermatofibrosarcoma protuberans. The unusual macroscopic finding was considered to be due to repetitive stimulation by foot movement.