There was occasional right upper quadrant pain after food, but no fever.
Blood test shows an elevated serum bilirubin and other liver enzymes.
Ultrasound examination of the abdomen reveals a large cystic mass in the expected location of the common bile duct, with diffuse dilatation of the intrahepatic biliary system. Gallbladder is normally seen without stones. A heavily T2W magnetic resonance cholangiography and a MR venogram were performed using a 1.5 T GE machine without breath holding.