Biliary images of this case. (a) Preoperative cholangiography from a endoscopic nasobiliary drainage (ENBD) tube inserted into B3. (b) Simultaneous cholangiography via the ENBD and percutaneous transhepatic biliary drainage (PTBD) tubes. The PTBD was inserted into B8. (c) A schematic of the biliary tree of this case. The ENBD tube was inserted into B3 (black arrow). The PTBD tube was inserted into B8 (white arrow). The lesions are marked in black. Aberrant B5 is marked in gray. B3 and B4 were not opacified because of severe stenosis.