Choledochal cyst - type Ic (MRCP)

Case contributed by Mostafa El-Feky


Biliary dilatation noted on ultrasonography

Patient Data

Age: 13 years
Gender: Female



Smooth fusiform extrahepatic biliary tree dilatation. Common bile duct reaches 9 mm at mid-portion.

Mild intrahepatic biliary radicals dilatation, more on the left lobe.

No common bile duct stones or distal obstacle. No masses.

Anomalous pancreaticobiliary Junction with dilated common channel (type c). 

Case Discussion

Features are likely representing choledochal cyst type I (Todani Ic) with associated pancreaticobiliary maljunction (PBM) type c (dilated common channel type).

Choledochal cyst type I has three types:

  • type Ia: cystic dilatation of entire extrahepatic biliary tree
  • type Ib: focal segmental (often distal) saccular dilatation of extrahepatic bile duct
  • type Ic: fusiform dilatation of extrahepatic biliary tree

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