A sigmoidoscopy is a medical exam of the large intestine. Using a long and flexible tube called a sigmoidoscope, your physician can check the inner lining of the rectum and lower part of the colon. This allows your doctor to check for ulcers, abnormal cells, polyps and cancer. A sigmoidoscopy is recommended for patients with gut problems, including rectal bleeding, problems with bowel movements, and abdominal pain.
