[Synchronous Triple Primary Lung Adenocarcinomas, One of which Showing a Thin-walled Cavity Nodule;Report of a Case].

A 74-year-old woman was referred to our hospital to investigate a right apical segment (S1)nodule which was increasing gradually. Chest computed tomography (CT) scan showed three lesions in right S1, posterior segment(S2) and superior segment(S6). S6 lesion was a thin-walled cavity enlarging gradually with same appearance. The S1 nodule was diagnosed as adenocarcinoma by CT guided biopsy. Since the possibility of lung cancer couldn't be denied for S6 lesion, right upper lobectomy and S6 segmentectomy with mediastinal lymph node dissection was performed. A postoperative pathology revealed all of 3 tumors as lung adenocarcinoma and confirmed as synchronous triple primary lung adenocarcinomas.