Table 2.

Classifications of biliary cysts

Ref.	Classification
Alonso et al[37]	Congenital cystic dilatation
	Congenital diverticulum of the common bile duct
	Congenital choledochocele
Todani et al[38,39]	IA Common type
	IB Segmental extrahepatic duct dilatation
	IC Diffuse extrahepatic duct dilatation
	II Diverticulum type in the whole extrahepatic duct
	III Choledochocele
	IVA Multiple cysts of the extra- and intra-hepatic ducts
	IVB Multiple cysts of the extrahepatic ducts
	V Caroli’s disease (intrahepatic bile duct cysts)
Vesser et al[48]	Choledochal cyst
	Choledochal diverticulum
	Caroli’s disease