Upper gastrointestinal bleeding and Rigler triad.

Gallstone ileus is a rare complication of cholelithiasis, characterized by mechanical bowel obstruction due to a biliary calculus originating from a bilioenteric fistula. The Rigler triad, consisting of aerobilia, ectopic gallstone, and intestinal obstruction, is rarely observed in its complete form. We present the case of a 92-year-old male with a history of acute lithiasic cholecystitis who presented to the Emergency department with acute epigastric pain.