Bowel cancer symptoms: Rectal bleeding is a sign of the disease and shouldn’t be ignored

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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.

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