Figure 1. Radiological findings of bile duct at onset. Representative coronal reformatted image section of contrast-enhanced CT (A) in the portal phase shows upstream dilatation of the left hepatic duct (yellow arrow head) and local dilatation of the common hepatic duct with wall thickening (pink arrow head). Mild dilated right anterior sectoral duct branches (pink arrow) and a remnant cystic duct (white arrow) are also shown. Continuous coronal sections of CT from anterior to posterior (B) show stenoses of bifurcations of the right posterior (yellow arrow) and anterior (pink arrow) sectoral ducts from the left hepatic duct (yellow arrow head) with wall thickening. Magnetic resonance cholangiopancreatography shows these stenoses and dilatation stereoscopically (C).