Procedure time for gastric endoscopic submucosal dissection according to location, considering both sides of the mucosal circumferential incision and submucosal dissection ; retrospective study - Procedure time for gastric endoscopic submucosal dissection according to location, considering both sides of the mucosal circumferential incision and submucosal dissection

The 12 locations were 1) lesions at the esophagogastric junction; 2) fornix; 3) lesser curvature of the gastric body; 4) greater curvature of the gastric body;5) anterior wall of the gastric body; 6) posterior wall of the gastric body; 7) lesion across the angle; 8) lesser curvature of the antrum; 9) greater curvature of the antrum;10) anterior wall of the antrum; 11) posterior wall of the antrum; and 12) lesion across from the pylorus ring. A significant difference was found in circumference incision speed (CIS) and submucosal dissection speed (SDS) for each location (p < 0.01), which demonstrates the validity of this classification system. In several locations, CIS and SDS were not consistent with each other.