Fig. 1

Chest computed tomography (CT) (a, b axial view and c coronal view) demonstrated the tumor invading the left upper bronchus in the left upper lung lobe, and the A3 and A6 branches were involved in the tumor. d Three-dimensional CT revealed that pulmonary artery branches (A4 + 5, A8, and A9 + 10) extended into the dorsal side of the superior pulmonary vein