Gallstone ileus

Discussion:

Gallstone ileus occurs when a gallstone erodes through the gallbladder into the duodenum, resulting in small bowel obstruction. It is more common in elderly women. It results in Rigler triad i.e. pneumobilia, small bowel obstruction, and ectopic gallstone.

The gallstone can be difficult to see and often blends in with the bowel contents. Therefore, close examination of the gallbladder is required in every distal small bowel obstruction case. Don't be fooled if you are incorrectly given the history of cholecystectomy! The channel between the gallbladder and small bowel is called a cholecystenteric fistula. 

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