Fig. 2

Operative findings. a After placing anchor sutures around the tumor to secure the surgical field (white arrows), we marked the margin line around the SMT from outside of stomach by pushing the margin with endoscopy. b, c We cut the seromuscular layer along the line using an ultrasonically activated device pulling an anchor suture to the tumor (black arrow). d We pulled the SMT out of the stomach and resected it by cut-and-closure procedure to mucosal layer using a laparoscopic stapling device three times. e We added seromuscular closure by handsewn suturing for reinforcement. f We confirmed the closure of the suture and the absence of bleeding with endoscopy during surgery (white arrow heads)