Endoscopic sleeve gastroplasty
In medicine, endoscopic sleeve gastroplasty (ESG) is a minimally-invasive, non-surgical (incisionless), endoscopic weight loss procedure that is part of the field of endoscopic bariatric therapies. To perform ESG, a physician sutures a patient's stomach into a narrower, smaller tube-like configuration.
Source: Wikipedia — Endoscopic sleeve gastroplasty (CC BY-SA 4.0)