Colonic diverticular bleeding: precise localization and successful management by a combination of CT angiography and interventional radiology.

We report a case of 50-year-old man with relapsing severe colonic diverticular bleeding. The patient required total blood transfusion of 14 units, despite fasting for bowel rest. Repeated CT, colonoscopy, and angiography could not determine the accurate bleeding site. Superselective arterial embolization could be finally achieved by precise localization on CT immediately after superior mesenteric arteriography.