Malignant fibrous histiocytoma in the chest cavity, report of four resected cases

Case 1: 35-year-old man. Chest X-P showed a mass shadow, which was 6 X 5 cm in size, well defined margin and homogeneous. He underwent enucleation but died 6 months after operation with local recurrence. Case 2: 55-year-old man. A peduncle tumor, which was 5 X 4 cm in size, arising from the left parietal pleura was resected. 2 years after the operation, local recurrence occurred at left parietal pleura and the lesion was resected. 9 years after the first operation, he is still alive free from the disease. Case 3: 62-year-old man. Multiple masses which invaded to the chest wall involving rib, lung and pericardium were situated in the site of left parietal pleura. He underwent partial resection of chest wall, parietal pleura, pericardium and lung, but he died 8 months after the operation with local recurrence. Case 4: 49-year-old man, a mass which completely obstructed the left main pulmonary artery situated at the site of left hilar region. He underwent left pneumonectomy. 2 year after the operation, he is still alive free from the disease. Malignant fibrous histiocytoma in the chest cavity is very rare in frequency. We have experienced recently 4 cases, and discussed with literature.