A procedure to look inside the rectum and sigmoid (lower) colon
Sigmoidoscopy is a procedure to look inside the rectum and sigmoid (lower) colon (the first 60cm of the bowel) for polyps, abnormal areas, or cancer.
A sigmoidoscope is inserted through the anus and rectum into the lower part of the colon (sigmoid colon).
A sigmoidoscope is a thin, tube-like instrument with a light and a lens for viewing.
It may also have a tool to remove polyps or tissue samples, which are checked under a microscope for signs of cancer.