“…Five types of carcinoma have been defined, based on specific histological criteria: giant cell carcinoma, pleomorphic carcinoma, CSA, spindle cell carcinoma, and pulmonary blastoma. Although CSA is generally difficult to diagnose preoperatively due to mixed composition of both epithelial and sarcomatous components, several reports have described preoperative diagnosis at approximate rate of 0% to 12% (7,10). Macroscopically, CSA is www.respircase.com usually gray-white in color, with hemorrhagic and/or necrotic areas (11,12).…”