HighlightsGallstone obstruction is a rare clinical entity presenting usually in elderly patients and is associated with a medical history of biliary symptoms.CT examination uncovered all findings consisting Rigler’s triad, thus air in the gall bladder, bowel obstruction and a gallstone inside the bowel lumen. It also identified a cholecystoduodenal fistula.Rupture of the small bowel occurred intraoperatively, and a large 3.2 cm gallstone was located in the terminal ileum, which was recovered.Post-surgical recovery was uneventful with no further report of obstruction symptoms at 6 month follow up.