Unexpected cause of upper gastrointestinal bleeding: beyond the typical complications of gallstone disease.

An 88-year-old man presented with haematemesis with haemodynamic stability requiring transfusion of 5 units of blood. Physical examination was unremarkable. Upper endoscopy identified a fistulous opening in the proximal second part of the duodenum (D2) with an oozing bleed and blood clots. A computed tomography (CT)-angiogram revealed a 18mm cystic artery pseudoaneurysm next to a fistulous communication between the gallbladder and D2, allowing the passage of a large stone (Bouveret syndrome). The patient successfully underwent emergent arterial embolization guided by a clip endoscopically-placed near the duodenal fistulous orifice. There were no intercurrences or bleeding recurrence.