Jejunal Diverticular Hemorrhage: A Diagnostic Blind Spot in Small Bowel Bleeding.

Small bowel bleeding is an uncommon but important cause of gastrointestinal (GI) hemorrhage. Here, we present a case of an 82-year-old woman who presented to the emergency department with lightheadedness and diarrhea. Upon further evaluation, a small-intestine bleed was suspected. Despite multiple studies, including two computed tomography angiograms (CTA) and subsequent mesenteric arteriography, localizing the hemorrhage was challenging. Due to ongoing clinical deterioration, a decision was made to pursue surgical exploration, which ultimately resulted in resection of the bleeding jejunal diverticulum.