Malignant fibrous histiocytoma of bone.

Malignant fibrous histiocytoma of bone is a highly malignant neoplasm similar to that found in soft tissues. It accounts for at least 5% of all primary malignant bone tumors. The majority of lesions are primary, but some arise in preexisting benign lesions. Definitive diagnosis is made on histologic examination, a storiform arrangement of spindly tumor cells being the classic finding. Radical resection combined with preoperative and postoperative chemotherapy is the treatment of choice.