Malignant fibrous histiocytoma of the retroperitoneum and genitourinary tract: a clinicopathological correlation and review of the literature.

Malignant fibrous histiocytoma is an uncommon pleomorphic tumor of the soft tissues possibly arising from the histiocyte. A case of malignant fibrous histiocytoma in the retroperitoneal space is reported. Pathologic and clinical features of this lesion as they relate to the retroperitoneum and genitourinary tract are discussed and suggestions for therapy are presented.