Workshops on "Innovative Therapeutic Endoscopy" for upper gastrointestinal tract diseases were held four times as the Japan Gastroenterological Endoscopic Society (JGES) Core Sessions at the 93rd to 96th Biannual Meetings of the JGES. A total of 48 research presentations (including two invited lectures) were reported, and various discussions were held on these topics. When the research presentations were categorized according to the therapeutic procedure, endoscopic submucosal dissection (ESD) was the most frequent with 28 presentations (58.3%), followed by laparoscopy endoscopy cooperative surgery (LECS) with six presentations (12.5%). When the research presentations were classified by the target organ of the therapeutic procedures, the duodenum was the most frequent with 26 presentations (54.1%), followed by the stomach with 13 presentations (27.1%). The most important issue was the establishment of a safe and reliable endoscopic resection method for duodenal lesions. Issues related to gastric ESD were establishing an efficient traction method and a method to prevent post-ESD bleeding in high-risk patients. Other important issues were establishment of an efficient traction method and methods of preventing delayed bleeding in high-risk patients who undergo gastric ESD, expansion of indications for minimally invasive treatment using LECS for gastric cancer, the development of endoscopic full-thickness resection (EFTR) for gastric submucosal tumors (SMTs), and improvement of per-oral endoscopic myotomy (POEM) for esophageal achalasia and per-oral endoscopic tumor resection (POET) for esophageal SMTs. Through the JGES Core Sessions, it is expected that the minimally invasive treatments using endoscopes developed in Japan will be further advanced.
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