A colonoscopy is the endoscopic examination of the large bowel and the distal part of the small bowel with a camera on a flexible tube passed through the anus. It can provide a visual diagnosis (e.g., ulceration, polyps) and grants the opportunity for biopsy or removal of suspected colorectal cancer lesions. Once polyps are removed, they can be studied to determine if they are precancerous. - Wikipedia. This class records details of any colonoscopy examinations performed.