Massive Upper Gastrointestinal Bleeding From a Duodenal Diverticulum in a Nonagenarian: A Report of a Rare Case.

Duodenal diverticula are typically asymptomatic and incidentally discovered, but they can rarely lead to significant complications, including upper gastrointestinal (UGI) bleeding. We report the case of a 91-year-old woman who presented with melaena and haematemesis. Endoscopy revealed an actively bleeding duodenal diverticulum, which was successfully managed with endoscopic haemostasis. This case illustrates the importance of considering duodenal diverticula as a rare cause of UGI bleeding in elderly patients and highlights the role of prompt endoscopic diagnosis and treatment.