How is bowel cancer diagnosed?
A GP will be able to detect a lump in the abdomen with a rectal examination but tests are needed.
These include either a flexible sigmoidoscopy, colonoscopy, barium enemas or a CT scan.
A CT scan is an x-ray procedure, which as the advantage of not involving a tube being passed through the anus.
A CT scan is not as reliable as a colonoscopy but it’s quality is steadily improving.
A colonoscopy is a flexible telescope which is passed through the anus, into the rectum and can visualise the lowest half of the colon.