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. It involves inserting a long, flexible tube into the rectum and then slowly advancing it through the colon. The goal of the procedure is to examine the lining of the colon for any signs of disease or abnormalities. It can also be used to remove polyps that may be present. Colonoscopies are important because they can detect cancer early and help prevent the spread of cancer.