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[Malignant fibrous histiocytoma (MFH) of the maxilla--an analysis of 7 cases].

Malignant fibrous histiocytoma is a rare tumor of the soft tissue or bone, especially if located in the head and neck. Up to the present, only 7 cases have been reported (6 in the mandible and only one in the maxilla). From Mar. 1958 to Mar. 1985, 7 patients with maxillary MFH, proved by pathology, were treated in our hospital. The X-ray manifestations were studied and analysed. The main X-ray characteristics are as follows: A large soft tissue mass in the maxilla, extending into the infratemporal fossa, pterygopalatina fossa, orbit, ethmoid sinuses, nasal cavity and cheek. Marked and extensive destruction of the maxilla with some amorphous reactive ossification. The bone appears like melting ice or ground glass. The value of computerized tomography in differential diagnosis and clinical staging of the maxillary malignant fibrous histiocytoma are discussed.