human
My doctor said I should get a colonoscopy. What is a colonoscopy and why is it important?
assistant
A colonoscopy is an examination of the large intestine using a flexible tube with a light and camera on the end. It is used to diagnose and treat certain conditions, such as cancer, inflammatory bowel disease, or polyps. It can also be used to screen for colorectal cancer in people over 50 years old. Colonoscopy is usually done under sedation, so that you are comfortable during the procedure.