Abstract

We report the clinico-pathological features of 7 cases of dermatofibrosarcoma protuberans. The tumor size were from 1.0 to 27cm in diameter. Local recurrence was seen in two cases under the follow up period of 4 months to 22 years. Histologicaly, the tumors of all cases were composed of spindle-shaped cells, and arranged in a storiform pattern. Immunoperoxydase staining with anti-CD34 (human progenitor cell antigen) and anti-factor XIIIa antibodies showed that CD34 was positive and XIIIa was negative in all cases. Clinically, early diagnosis and wide surgical excision are considered to be important to evade recurrence.