What is the flexible sigmoidoscopy (bowel scope, Flexi-scope) test?

During flexible sigmoidoscopy (also called ‘bowel scope’ or Flexi-scope), a narrow, flexible tube with a camera on the end is inserted into the rectum and up into the lower part of the large bowel by a specialist nurse or doctor. Flexible sigmoidoscopy is used to examine the inner surface of the lower bowel for growths, called polyps or adenomas. Polyps are common and are not cancerous, but some can develop into cancer so they are generally removed as part of the procedure, or during a follow up test.