2023 Volume 45 Issue 2 Pages 130-134
Background. We herein report a patient who underwent surgery for lung cancer of the right upper lobe in whom the right B3 arose from the middle lobar branch. Case Report. A 68-year-old woman was found to have a partially solid mass (maximum diameter, 47 mm; solid diameter, 42 mm) in the right upper lobe S1b. The right B3 arose from the middle lobar bronchus. During surgery, V1-3 were transected, after which the superior trunk of the pulmonary artery and B1+2 were transected. A3a and A3b were also transected, and B3 was identified and transected. Finally, a fissure was created between the upper and middle lobes. Conclusions. In cases with a bronchial anomaly, a careful preoperative evaluation based on bronchoscopic and computed tomography findings is important to ensure a safe surgery.