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Colonoscopy

A colonoscopy is the endoscopic examination of the large bowel and the distal part of the small bowel with a fibre optic camera on a flexible tube passed through the anus. It can provide a visual diagnosis and allows for a biopsy or removal of suspected colorectal cancer lesions. Colonoscopy can remove polyps as small as one millimetre or less. Once polyps are removed, they can be studied with the aid of a microscope to determine if they are precancerous or not. It can take up to 15 years for a polyp to turn cancerous.
A colorectal surgeon explains what happens during a colonoscopy, a procedure which examines the large bowel, the colon or the rectum.

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