Incidentally Found Cholecystoduodenal Fistula and an Unusual Case of Gallstone Ileus After Laparoscopic Cholecystectomy.

Gallstone ileus, a rare and potentially fatal complication of cholelithiasis, occurs when gallstones breach the gastrointestinal tract through a fistula, causing an obstruction and potentially leading to severe complications. This case report details the experience of a 44-year-old woman with gallstone ileus stemming from an unnoticed cholecystoduodenal fistula following a routine cholecystectomy. The fistula was only discovered during surgery despite advanced imaging, revealing extensive adhesions.