[Pulmonary Nontuberculous Mycobacteriosis Appeared at the Surgical Margin of the Lung Cancer Surgery;Report of a Case].

A 70-year-old woman had undergone right S8+9 segmentectomy for stage I A lung cancer. Surgical staplers were used for an intersegmental line. Two years after surgery, routine chest computed tomography(CT) showed a 40-mm mass around the staple line in the right lower lobe, and positron emission tomography (PET) was positive. The mass was suspected to be local recurrence of lung cancer, and she was done additional surgery for resection of the remaining right lower lobe. The pathologic diagnosis was lung nontuberculous mycobacteriosis. It was suggested that nontuberculous mycobacteriosis developed at the atelectasis around the staple line. In addition to local recurrence, the possibility of nontuberculous mycobacteriosis should be considered in cases of pulmonary nodules appearing at the staple line after pulmonary resection.