Colonoscopy is the endoscopic examination of the large colon. It is one of the most important preventions and screening tools for colorectal carcinoma. Colon cancer is the second most common and deadliest cancer in the USA and is totally preventable and curable if found early. Bowel prep is used and sedation is fully amnesic so you will not remember the procedure. It is required for cancer prevention by all insurances in people over 50 and some earlier, as per the following guidelines for screening:
American College Of Gastroenterology – Colonoscopy