Jejunal Diverticulosis as a Rare Cause of Severe Obscure Gastrointestinal Bleeding in an Elderly Patient: A Case Report.

Jejunal diverticulosis is a rare cause of obscure gastrointestinal bleeding (OGIB) that can present with life-threatening hemorrhage. We report a 69-year-old male with recurrent melena, severe anemia, and hemodynamic instability requiring multiple transfusions. Upper and lower endoscopy were nondiagnostic, and CT angiography failed to localize the bleeding source. Capsule endoscopy showed distal small bowel bleeding without clear localization. The patient developed transfusion-dependent bleeding complicated by Klebsiella pneumoniae sepsis. Due to persistent hemorrhage, diagnostic laparoscopy was performed and revealed two jejunal diverticula with engorged mesenteric vessels. Segmental small bowel resection was done with complete resolution of bleeding. This case highlights the limitations of noninvasive modalities in intermittent small bowel bleeding and supports early surgical intervention when the bleeding source cannot be identified.