human
My doctor says that I need to get a colonoscopy. What does that mean and how often do I need to do it?
assistant
A colonoscopy is a test that involves inserting a long, flexible tube into your rectum and colon. The doctor uses the tube to examine the lining of your large intestine for signs of disease or other problems. It's a very common procedure and usually done as part of a routine checkup. You may need to have a colonoscopy every five years from age 50 on up.