Fig. 1a,b.

A patient who had undergone percutaneous transhepatic biliary drainage (PTBD) suddenly presented with high fever. a Abdominal ultrasound demonstrated dilation of the left medial segmental bile duct (B4). A diagnosis of segmental cholangitis of this undrained segment was made, and additional PTBD was performed urgently. b Cholangiogram through the PTBD catheter shows typical findings of liver abscess