- Patients suffering from colorectal cancer, diverticulosis, benign tumors such as polyps or inflammatory bowel disease and surgically treated (i.e. rectosigmoid resection, anterior resection of rectum, ileocaecal/right hemicolectomy, left hemicolectomy, abdominoperineal resection or total/subtotal colectomy), and patients undergoing reversal of Stoma and Hartmann procedures will be included.