JGES guidelines for colorectal endoscopic submucosal dissection/endoscopic mucosal resection

Colorectal endoscopic submucosal dissection ( ESD ) has become common in recent years. Suitable lesions for endoscopic treatment include not only early colorectal carcinomas but also many types of precarcinomatous adenomas. It is important to establish practical guidelines in which the preoperative diagnosis of colorectal neoplasia and the selection of endoscopic treatment procedures are properly outlined, and to ensure that the actual endoscopic treatment is useful and safe in general hospitals when carried out in accordance with the guidelines. In cooperation with the J apanese S ociety for C ancer of the C olon and R ectum, the J apanese S ociety of C oloproctology, and the J apanese S ociety of G astroenterology, the J apan G astroenterological E ndoscopy S ociety has recently compiled a set of colorectal ESD /endoscopic mucosal resection ( EMR ) guidelines using evidence‐based methods. The guidelines focus on the diagnostic and therapeutic strategies and caveat before, during, and after ESD / EMR and, in this regard, exclude the specific procedures, types and proper use of instruments, devices, and drugs. Although eight areas, ranging from indication to pathology, were originally planned for inclusion in these guidelines, evidence was scarce in each area. Therefore, grades of recommendation were determined largely through expert consensus in these areas.