Step-up training for colorectal and gastric ESD and the challenge of ESD training in the proximal colon: results from a German Center

Background and study aims The endoscopic submucosal dissection (ESD) of cancerous and precancerous lesions in the gastrointestinal (GI) tract is an effective but difficult-to-learn procedure, especially for Western endoscopists. We developed a step-up training protocol and evaluated its outcome on a single endoscopist using specific performance measures. Patients and methods The training protocol included a 12-month period of 50 observational...