Kyobu geka. The Japanese journal of thoracic surgery
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A 59-year-old man consulted our hospital because of an abnormal shadow on a chest computed tomography, located in the right lower lobe. Fluorodeoxyglucose-positron emission tomography showed abnormal uptake in the tumor suggesting lung cancer and right lower lobectomy was performed. ⋯ Immunohistochemical staining was positive for TTF-1, CK-7 and CK-20. Postoperative screening of the abdomen revealed no suspicious primary lesion in the colon and the tumor was diagnosed as a pulmonary enteric adenocarcinoma.