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Almost any colorectal superficial neoplastic lesion can be treated by endoscopic resection (ER) but very little is known about outcomes of ER leaving circumferential or near-circumferential mucosal defects. We report the outcomes of ER leaving ≥ 75% circumferential mucosal defects performed in a western expert centre. Five hundred eighty-seven ERs of large colorectal lesions ≥ 20 mm were grouped according to the extent of the mucosal defect and comparisons made between those with

Neurotransmitter imbalance is hypothesised as a pathogenetic mechanism in several bowel conditions. We previously reported increased 5-HT in the sigmoid mucosa of colon resected for complicated diverticular disease (DD). We aimed to identify if abnormal 5-HT expression is associated with symptoms of uncomplicated DD. This was a prospective, comparative study and follow-up survey of symptoms. We examined the differences in 5-HT between DD patients and controls, as well as the presence of bowel symptoms at time of endoscopy and also 2 years later. Sigmoid biopsies were collected at colonoscopy. Immunohistochemical staining for 5-HT cells was performed. Eighty-seven patients were recruited, 37 (42.5 %) DD and 50 (57.5 %) controls. No patients underwent surgery. There was no significant difference in total mean number of 5-HT-positive cells in DD compared to controls or between patients and controls with abdominal symptoms. Forty-one patients (47.1 %) responded to questionnaires at median 57.8 months from biopsy. Eighteen (43.9 %) were DD and 23(56.1 %) controls. 5-HT counts showed no significant association to symptom persistence. Although 5-HT expression has previously been found to be increased in complicated DD in whole bowel-resected specimens, the same is not confirmed on colonic mucosal biopsies. This raises the suggestion that 5-HT may be involved in the development of acute complications but may not be involved in the pathogenesis of chronic symptoms.

Selection of an appropriate approach to treat full thickness rectal prolapse remains problematic and controversial. We propose that rectal prolapse may be classified as 'low type' (true rectal prolapse) or 'high type' (intussusception of the sigmoid with a fixed lower rectum). This assessment can be made via a simple clinical test of digital rectal assessment of lower rectal fixity ('the hook test') based on anatomic changes in rectal prolapse to guide the selection process. In cases with the low-type prolapse, a perineal approach is appropriate (either Delorme's procedure, or rectosigmoidectomy with or without pelvic floor repair). For the high type, an abdominal rectopexy with or without high anterior resection is needed. Retrospective analysis of our cases treated over the last 6 years showed a recurrence rate of 6% in perineal procedures and 0% in abdominal rectopexy combined with resection to date. We believe that employing our simple test and classification can contribute to better patient selection for either approach, minimize anaesthetic and surgical risks and also result in lower recurrence rates.