Traction-assisted endoscopic subserosal dissection for gastric subepithelial tumors: A case series study (with video)

Figure 1 Detailed traction-assisted endoscopic subserosal dissection procedure steps. A: Mark the edge of the lesion with the Dual knife; B: Incise the mucosal layer around the lesion along the mark; C: Dissect the submucosal layer, and expose the lesion and the muscularis propria; D: Incise the muscularis propria; E: Administer the ubserosal injection to separate the serosa from the muscularis propria; F: Use the traction technique to pull the lesion into the gastric cavity, and expose the space between the serosa and the muscularis propria; G: Resect the lesion completely, and maintain the integrity of the serosa; H: Close the gastric wall wound; I: Retrieve the lesion specimen.