[Surgery of Papillary Adenoma;Report of a Case].

A 59-year-old man consulted our hospital because of an abnormal shadow on a chest X-ray without any symptoms. A chest computed tomography (CT) revealed growing pulmonary nodule in the right lower lobe. Benign lung tumor was suspected and the patient underwent right lower lobe partial resection. Pathological examination demonstrated the tumor to be pulmonary papillary adenoma within round atelectasis.