Abstract
A 62-year-old man had a small nodule in the right upper lobe, which was diagnosed as adenocarcinoma by transbronchial biopsy analysis. Preoperative three-dimensional (3D) angiography with contrastenhanced images obtained using multi detector-row computed tomography (CT) revealed a 3-mm diameter vein for the posterior segment of the right upper lobe running posterior to the right hilum that drained directly to the left atrium, and independent of both the superior and inferior pulmonary veins (Fig 1, arrows). A corresponding small vessel located dorsal to the right bronchus intermedius was seen in axial CT sections. We performed a thoracoscopic right upper lobectomy along with mediastinal lymph node dissection. Intraop-
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