What is flexible sigmoidoscopy?
Flexible sigmoidoscopy is a test that uses a flexible, narrow tube with a light and tiny camera on one end, called a sigmoidoscope or scope, to look inside the rectum and the lower, or sigmoid, colon. Flexible sigmoidoscopy can show irritated or swollen tissue, ulcers, and polyps—extra pieces of tissue that grow on the inner lining of the intestine. A health care provider performs the procedure during an office visit or at a hospital or an outpatient center.
Source: National Institute of Diabetes and Digestive and Kidney Diseases