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