The laparoscopic resection with a linear stapler for subepithelial tumors (SET) can lead to excessive resection of healthy tissue of the gastric wall resulting in deformity or stenosis. Attaining a positive surgical margin is also possible. Endoscopic full-thickness resection (EFTR) can be used for tumor resection by direct visualization of the tumor from inside the stomach lumen leading to a free surgical margin with little resection of healthy tissue. In order to overcome current endoscopic technical limitations, we will combine the conventional laparoscopic approach with EFTR.
The purpose of this study is to evaluate the feasibility of endoscopic full-thickness resection with laparoscopic assistance.