AbstractA technique is described for assisting the performance of distal mucosal proctectomy in ulcerative colitis by peranal eversion of the lower rectum. The ease, accuracy and expedition of the mucosal excision have been impressive. In 9 of 16 patients having this procedure as part of an ileo‐anal anastomosis (with a pelvic ileal reservoir) the functional results seemed to be similar to those obtained in 14 patients submitted to the same operation but with an endocavitary technique of rectal mucosectom