Postradiation malignant fibrous histiocytoma of the maxillary sinus.

Malignant fibrous histiocytoma is the most common soft tissue sarcoma in adults. The common sites of involvement are the retroperitoneal space and limbs. The occurrence of this tumor in the head and neck is rare. Recent studies have shown that the occurrence of malignant fibrous histiocytoma in the head and neck can follow radiotherapy for the treatment of other tumors. We, herein, report a case of malignant fibrous histiocytoma, which developed 17 years after radiotherapy of a carcinoma in the maxillary sinus.