Diagnostic imaging of gallstone ileus

Objective To study imaging findings of gallstone ileus and to discuss the value on diagnosis. Methods The image findings of 15 patients with gallstone ileus confirmed by clinical information were reviewed retrospectively.Results Signs of ileus, ectopic gallstone, and penumobilia were seen in all cases. The distorted gallbladder was seen in 14 cases except one case with the gallbladder resection. Signs of biliary enteric fistula were seen in 4 cases, and peritoneal fluid was seen in 2 cases. Abdominal plain films were performed in 5 cases in the same time and signs of penumobilia were seen in 1 case. Signs of ileus were seen in 3 cases. Gastroenterography study was performed in 2 cases and signs of biliary enteric fistula were seen in 2 cases, and filling defect of the bowel in 1 case. Abdominal US was performed in 7 cases. Gallbladder abnormalities were seen in 7 cases, and penumobilia in 3 cases. Conclusion Primary result revealed that the CT appearance of gallstone ileus was particularly striking. CT is the best valuable tool for the diagnosis of gallstone ileus, and X-ray plain film and sonography examination are shown to be very good screening examinations.