"Appearances are those of Rigler triad, better seen than on plain radiograph. Since only a minority of gallstones calcify (approximately 10–20%), and their density is similar to regular bowel content, it is easy to overlook the offending gallstone 1. A bowel bulge just before the transition point may help locate the gallstone. Typically, stones are large, measuring several centimetres (2-3 cm)."
"Due to the demographics of the population affected (elderly), this condition continues to have high mortality (12-30%) 1-2,7."
Expected headings
"Barium study"
"The overall sensitivity, specificity, and accuracy of CT in diagnosing gallstone ileus is around 93%, 100%; and 99%, respectively 11."