human
I've been told that I need to have a colonoscopy. What is it and why is it necessary?
assistant
A colonoscopy is an examination of the large intestine using a thin, flexible tube called a colonoscope. It is used to diagnose and treat certain conditions affecting the large intestine. The procedure involves inserting a long, flexible tube into the rectum and slowly advancing it up through the colon. During the exam, the doctor can view the inside of the colon on a video monitor and take biopsies or remove polyps if needed.