The gallbladder is markedly distended (measuring up to 17cm) and contains a large volume of sludge and mobile gallstones. There is small volume pericholecystic free fluid. No gallbladder wall thickening. Sonographic Murphy's sign is however positive. Intrahepatic duct dilation is present.
The common bile duct measures up to 6.4 mm. No choledocholithiasis detected.