[A case of malignant lung fibrous histiocytoma].

Malignant fibrous histiocytoma (MFH) is the most common soft tissue sarcoma in adults. However primary MFH of the lung is very rare and only a few cases have been reported in the literature. A 79-year-old man complained of coughing and was treated at our hospital. The chest X-ray and CT scan showed a mass shadow in left lung. He underwent partial resection of the left upper lobe (S 5). No other abnormal lesions were detected in the abdomen or extremities, and the tumor was diagnosed as malignant fibrous histiocytoma (MFH) of the lung. He has been well for 18 months since the operation.