A 74-year-old woman complains of vomiting and intermittent colicky abdominal pain. X- rays reveal fluid levels and air in the biliary tree. What is the likely cause?
Correct Answer: Gallstone ileus
Description: Gallstone ileus results in "tumbling" intestinal obstruction due to the intermittent nature of the condition. Previous choledochoduodenostomy could give air in the biliary tree but not obstruction.
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