FIGURE 3.

Non‐exposed endoscopic wall‐invasion technique. (a) The markings were placed to indicate the resection line. (b) The seromuscular layer around the tumor was incised laparoscopically. (c) The tumor was endoscopically removed with a submucosal dissection technique. (d) The mucosal defect was closed with laparoscopic suture and endoscopic clipping.