An unusual case of deep penetrating dermatofibroma of the lower leg

Histological examination of a punch biopsy specimen of a slowly growing, ir regular dermal tumour from the right lower leg of a 32-year-old woman, whic h had been diagnosed clinically as a dermatofibrosarcoma protuberans, showe d it to be a deep penetrating dermatofibroma. The diagnosis was established by characteristic histological and immunohistochemical criteria. This allo wed sequential excision in two sessions with primary closure and an optimal cosmetic result.