Diffuse idiopathic colonic varices presenting with lower gastrointestinal bleeding in an elderly patient: a case report and review of the literature.

We report a case of lower gastrointestinal bleeding caused by idiopathic colonic varices. A 74-year-old woman presented with rectal bleeding. Colonoscopy revealed numerous varices of the entire colon, which, after an extensive work-up, proved to be idiopathic. No specific therapy or transfusions were required and there has been no further bleeding to date (follow-up 10 months). Review of the literature demonstrates that diffuse idiopathic colonic varices are a rare cause of lower gastrointestinal bleeding, especially as the first presentation in an elderly patient.