Fig. 2

Schematic diagrams of the surgery. a According to the CT findings and intraoperative bronchoscopic guidance, three incision lines were scheduled for wedge resection of the right main bronchus where the upper lobar bronchus situated; b Deeper wedge resection of the bronchus. The incision edge was free of tumor, confirmed by frozen pathological examination; c 3–0 absorbable suture was used to partly suture the proximal and distal incision line, with a hole left and trimmed by scissors to match the orifice of the upper lobar bronchus; d 4–0 absorbable suture was used to perform an end-to-side anastomosis to restore the upper lobar bronchus and reconstruct the secondary carina