Usefulness of Intraoperative Computer Tomography-Assisted Thoracoscopic Segmentectomy for Small-Sized Lung Cancer

We report the case of a patient who had synchronous primary lung cancers in the left upper lobe (S(1+2)a, S(1+2)c), and underwent S1+2 segmentectomy. The lesion in S(1+2)c was non-palpable, and the location was confirmed using intraoperative computed tomography (CT) scan. After A(1+2) and B1+2 had been cut, the intersegmental border was marked with clips and intraoperative CT was performed. After confirming the correct anatomical intersegmental border and the resection margin was sufficient, we cut the intersegmental border. The two lesions were both adenocarcinomas. Intraoperative CT was useful for confirming the locations of non-palpable lesions and anatomical intersegmental borders.