A 64-year-old woman was admitted to our hospital with a 16-mm non-solid tumor with pure ground-glass nodule (GGN) contents in the posterior segment near the anterior segment of her right upper lung lobe that was suspicious of adenocarcinoma in situ (AIS). Three-dimensional computed tomography (3DCT) simulation was performed to identify the subsegmental artery and vein pre- or intra-operatively. Port-access thoracoscopic bisubsegmentectomy of the right upper lobe was performed. A frozen section revealed AIS. The tumor size was 13 mm and the surgical margin from the tumor edge to cutting line was more than 20 mm. The surgical time was 191 minutes and bleeding was 101 mL. The chest tube duration was 3 days and the post-operative hospital stay was 6 days.
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