Fig. 5

Contrast-enhanced computed tomography and magnetic resonance cholangiopancreatography findings for the recurrent lesion. A Contrast-enhanced computed tomography findings revealed a 1.5-cm mass in the lower remnant common bile duct at 16 months after the first surgery (arrow). B Magnetic resonance cholangiopancreatography findings identified the tumor as a defect in the lower remnant common bile duct (arrowhead)