Nervous about getting a colonoscopy? A gastroenterologist answers six common questions about prep, the procedure, and what to expect.

Colonoscopy procedure A colonoscopy is an important procedure for detecting colorectal cancer in those at high risk or over the age of 50. A colonoscopy usually takes 30–60 minutes. However, people ...

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A colonoscopy is an exam that lets your physician see your entire colon. Before the test, your health care team will give you instructions for how to clear your colon of any stool. This process is ...