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Residual lithiasis and cholangitis after laparoscopic cholecystectomy, developing despite preoperative ERCP. On the 6th postoperative day, CT (a–c) showed residual intraperitoneal air (+ in a), usual collection at gallbladder fossa (* in b), “mottled” liver parenchymal enhancement and bilateral dilatation of intrahepatic bile ducts. Focused coronal image (c) showed a tiny stone (thin arrow) at the distal CBD, confirmed and treated by ERCP
