What is this article about?
A colonoscopy is a diagnostic procedure wherein the inside of the colon (large bowel) is examined for signs of bowel cancer or illness. It is performed using a flexible tube known as a colonoscope, which is inserted into the anus and guided through the colon. The colonoscope uses a camera and light to transmit a clear, magnified image of the colon lining to a monitor while it is being maneuvered. The clinician may need to remove polyps (potentially cancerous growths on the colon lining) or collect tissue samples during the procedure.