DERMATOFIBROMA WITH GRANULAR CELLS

A new histologic variant of dermatofibroma, only briefly alluded to in dermatological literature is reported. This tumor was located in the back of a 24-year-old man. It was present for about 2 years and had a history of trauma 2 months before excision. The lesion showed similar characteristics to those of conventional dermatofibroma as well as the presence of groups of granular cells identical to those seen in granu lar cell tumors. It is important to recognize dermatofibroma with gran ular cells because it may be confused with a variety of benign or mali gnant soft tissue tumors containing similar granular cells that entail different significance or prognosis. The immunohistochemical study su pports a granular cell change in a dermatofibroma instead of a granula r cell tumor that has been traumatized, with secondary formation of a dermatofibroma reaction. (C) Munksgaard 1996.