Dermatofibrosarcoma protuberans with unusual sarcomatous transformation: a series of 4 cases with molecular confirmation.

Abstract:Dermatofibrosarcoma protuberans (DFSP) is a superficial sarcoma of intermediate malignancy usually composed of monotonous short spindle cells with storiform architecture. The tumor cells are diffusely reactive for CD34 and characterized by a translocation involving chromosomes 17 and 22 or