What is a colonoscopy?
A colonoscopy is a type of endoscopy used to detect abnormalities in the large intestine (colon) and rectum. This is performed by inserting a long, flexible tube, known as a colonoscope, into the rectum. A tiny video camera at the tip of the tube allows a doctor to see inside the entire colon.
This tube also allows doctors to remove polyps and other abnormal growths and take tissue samples (biopsies).