Biliary cysts: Etiology, diagnosis and management

Table 1 Types of an anomalous pancreaticobiliary junctions (Komi classification)

Type name	Type description
Type I	A narrowed common bile duct joins the pancreatic duct at a right angle
IA	A slender common channel
IB	A short or long ectatic common channel
Type II	A pancreatic duct joins the common bile duct at an acute angle
IIA	A slender common channel
IIB	A short or long ectatic common channel
Type III	It is complicated by a patent accessory pancreatic
IIIA	A classic pancreas divisum
IIIB	A pancreas divisum without a pancreatic duct
IIIC	A patent accessory pancreatic duct with an intricate network
IIIC1	A tiny communicating duct between the main and accessory ducts
IIIC2	A communicating duct with the same caliber as the main and accessory ducts
IIIC3	A total or partial dilatation of the ductal system

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