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A 64-year-old woman presented to the colorectal clinic with 3 months of symptoms of loose stools, flatulence and some weight loss. There was no history of abdominal pain, rectal bleeding or anaemia. A similar episode 5 years earlier resolved spontaneously but was investigated with a colonoscopy at that time and revealed diverticular disease and a 3 mm hyperplastic polyp at the hepatic flexure. To investigate the current symptoms, a repeat colonoscopy was advised but this was initially declined in favour of CT colonography (CTC) to avoid the laxative preparation and pain experienced during the previous examination. The CTC was performed following a day of modified diet and three (30 mL) split doses of Gastrografin without any other laxatives.
The CTC …