Figure 1.

(A–D) Enhanced CT of the abdomen showed that the common hepatic duct, the beginning of the left hepatic duct (red arrow), the right hepatic duct (green arrow) and its branch walls were thickened and gradually strengthened. The intrahepatic bile ducts were slightly dilated. The pancreas (orange arrow) was full, and the edges were irregular. After the enhancement, the enhancement at the arterial phase decreased and showed low density. But it further enhanced with the delay. No pancreatic duct dilation was seen; (E) Biliary MRCP indicated multi-segment lumen stenosis of the bile duct. The thickening of the tube wall involved a large extent, which did not match the degree of lumen expansion. The thickening of the tube wall was obvious, irregular, and asymmetric; (F) The enhanced MRI of liver indicated that the bile duct wall was gradually strengthened. The pancreas was full with straight contour. The T2 signal was increased,and the TI signal was reduced. The enhancement was uniform. The pancreatic duct was not dilated.