Management of Choledochal Cysts at a Tertiary Care Centre: A Nine-Year Experience from India

Table 2

Todani modification of Alonso-Lej classification.

Cyst type	Morphological description
Ia	Solitary saccular dilatation of the extrahepatic biliary system
Ib	Solitary segmental dilatation of the extrahepatic biliary system
Ic	Solitary diffuse or cylindrical dilatation of the extrahepatic biliary system
II	Diverticulum of the supraduodenal portion of the bile duct
III	Cystic dilatation of the intraduodenal portion of the bile duct (choledochocoele)
IVa	Multiple cystic dilatations involving both intrahepatic and extrahepatic biliary system
IVb	Multiple cystic dilatations involving only the extrahepatic biliary system
V	Multiple cystic dilatations involving only the intrahepatic biliary system (Caroli’s disease)