Dieulafoy's lesion: a rare cause of lower gastrointestinal bleeding.

The most common etiologies of lower gastrointestinal bleeding include ischemia, diverticulosis, and angiodysplasia. A Dieulafoy's lesion, an uncommon cause of upper gastrointestinal bleeding, is even more rare as an etiology of lower gastrointestinal bleeding. We report a case of an elderly patient with abrupt hematochezia requiring stabilization and blood transfusions. The presumptive diagnosis was diverticulosis or an arteriovenous malformation, but colonoscopy revealed that the source of bleeding was a Dieulafoy's lesion in the ascending colon. The lesion was injected with epinephrine, followed by placement of clips to achieve hemostasis. There were no subsequent interventions and the patient was safely discharged.