Cutaneous malignant fibrous histiocytoma. A rare but serious malignancy.

We report 3 cases of malignant fibrous histiocytoma occurring as primary neoplasms of the skin. The first case developed in a leg ulcer of traumatic origin. The second developed on the lower lip at the site of a squamous cell carcinoma which had been treated by radiotherapy. The third arose on a calf at a site of previous surgery. The literature on this malignancy is reviewed, with emphasis on cutaneous involvement.