Carcinosarcoma of the lung with spindle-cell epithelial component: report of a case

A case of primary endobronchial carcinosarcoma with predominant spindle cell squamous carcinoma is described. The spindle cell component has not been previously reported as occurring in pulmonary carcinosarcomas. We suggest that this variety of carcinosarcoma closely resembles sarcoma of the lung histologically and emphasize that a distinction between the two neoplasms is important in view of the generally good prognosis of endobronchial carcinosarcomas.