human
I've heard that I should get a colonoscopy. Why?
assistant
Colonoscopies are used to screen for colorectal cancer, which is the second most common type of cancer in the United States. The procedure involves inserting a flexible tube into your rectum and slowly advancing it up through your colon. During the procedure, the doctor can take pictures of any polyps or other abnormalities that may be present. If any suspicious areas are found during the exam, you may need further testing or treatment.