Metachronous bile duct cancer nine years after resection of gallbladder cancer

Figure 1 Radiologic finding of hilar bile duct cancer. A: Dynamic abdominal CT during arterial phase of axial image showed a low-density mass, 1.7 cm in diameter at the hilum of the liver, extending to the right intrahepatic bile duct (arrow) and intrahepatic bile duct dilatation in the right lobe (arrow head); B: Dynamic abdominal CT during venous phase of coronal image showed the mass extending to the second branch of the intrahepatic bile duct in right hepatic lobe (arrow); C: T2WI, axial image of MRI showed the mass located in the perihilar bile duct with the same signs of liver parenchyma (arrow), and extending to the second branch of the intrahepatic bile duct in the right hepatic lobe.