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This woman has co-existing acute cholecystitis and ureteric colic. Findings include pericholecystic stranding (blue dotted arrow), perinephric stranding (yellow dotted arrow), hydronephrosis (red dotted arrow), stone just proximal to the right vesicoureteric junction with soft-tissue rim sign (red arrow), tensile gallbladder fundus sign (blue arrows) and Mercedes-Benz sign of air within a gallstone (yellow arrow).