How much notice do you have to give? http://fittor.fun/www9taxi-com/ tubixe com Since the main goal of CRC screening is to remove polyps in the bowel, the risk of over-diagnosis is low, unlike that seen in breast and prostate cancer screening. "The risk of bowel perforation with endoscopy, while not non-existent, is very low and so far no trial has reported rates of perforation that could compromise the feasibility of screening on either practical or ethical grounds," Prof Autier says.