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Cholecysto-duodenal fistula

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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A cholecysto-duodenal fistula is a connection between the gallbladder and the duodenum. It may occur as an uncommon complication of chronic cholecystitis when the gall bladder becomes adherent to the adjacent duodenum and a stone ulcerates through the wall to form a cholecysto-duodenal fistula.

The fistula allows decompression of the gall bladder and passage of the gall stones from the gall bladder into the bowel, and also allows gas to enter the biliary tree.

Often this condition is harmless and only is manifested as gas in the biliary tree on plain abdominal X-ray. However, sometimes a large stone may pass through the fistula and then becomes 'stuck' at the narrowest part of the small intestine, the distal ileum. This in turn leads to the development of a gallstone ileus.

Fistulas may develop between the gallbladder and other parts of the gut, e.g. colon and very rarely, stomach.


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