Fig. 1

Pathologic findings on CT. a CT shows abnormal thickening of the gallbladder wall that appeared to invade the adjacent portion of the liver. An infiltrative low-density mass (30 mm) involving the gallbladder neck, upper biliary tract, and hilar bile duct as well as intrahepatic bile duct dilatation are visible (annotated with a black solid arrow). b The pancreas was not enlarged (annotated with a black solid arrow)