Sigmoidoscopy: MedlinePlus Medical Encyclopedia - Internal anus camera
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Sigmoidoscopy is a procedure used to see inside the sigmoid colon and rectum. The sigmoid colon is the area of the large intestine nearest to the rectum. the anus. The scope is a flexible tube with a camera at its end. Endoscopy is a procedure that allows a doctor to view the inside of a person's body. Doctors Most endoscopes are thin tubes with a powerful light and tiny camera at the end. Rectum and sigmoid colon, which is the bottom part of the colon.