human
My doctor has recommended that I get a colonoscopy. What is a colonoscopy and why is it important?
assistant
A colonoscopy is an examination of the large intestine, or colon. It involves inserting a long tube with a camera on the end into the rectum and slowly advancing it through the colon. The goal of a colonoscopy is to look for signs of cancer or other diseases in the colon. Colonoscopies are considered one of the most effective screening tests for colon cancer.