What happens if a screening test shows an abnormality?
If a screening test finds a problem, more tests may be needed. These tests may include x-rays of the gastrointestinal tract, sigmoidoscopy, or, most often, colonoscopy. If the iFOBT is positive you will need a follow-up colonoscopy. If an abnormality is found during a sigmoidoscopy, a biopsy or removal of a polyp may be done during the test. An optical colonoscopy may be recommended. If an abnormality is found during a standard colonoscopy, a biopsy or removal of the polyp is done to find out if cancer is present and remove any polyps. If an abnormality is found during a virtual colonoscopy, most patients would be referred for an optical colonoscopy the same day.
