Malignant fibrous histiocytoma of the liver: a case report and review of the literature.

A case of primary sarcomatous tumor of the liver in a 61-yr-old man is reported. The tumor, which measured 8.5 X 8 X 8 cm, was located in the right lobe of the liver and consisted of spindle cells in a storiform pattern intermingled with bizarre giant cells. Immunohistochemically, most tumor cells expressed vimentin. Cytoplasmic immunoreactivity with alpha 1-antitrypsin and lysozyme was documented in the giant cells. Ultrastructurally, cells with fibroblastic and histiocytic features were present. The morphological and immunohistochemical findings justify the conclusion that the tumor should be classified as a malignant fibrous histiocytoma. Reported cases of hepatic malignant fibrous histiocytoma were reviewed and compared with similar tumors observed in other body sites.