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Saturday, July 31, 2010

Gallstone Ileus on CT Scans

-This CT demonstrates the classic Rigler’s Triad of gallstone ileus: Pneumobilia (air in the biliary tract), low small bowel obstruction with distended small bowel loops, and an impacted gallstone in the terminal ileum.
-Discussion
Gallstone ileus is the name given to the mechanical small bowel obstruction caused by a gallstone impacting in the terminal ileum. The gallstone passes through a cholecystoduodenal fistula, travels the length of the small bowel, and then obstructs just proximal to the ileocecal valve. It is an unusual complication of cholecystolithiasis and chronic cholecystitis.


http://eradiology.bidmc.harvard.edu/Classics/item.aspx?section=Emergency+Radiology&labelpk=33f0adab-853f-4010-a0e2-0756b3f1eac5&pk=c1310251-d7d5-47e3-897d-e64cef4d2f56

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