Table 1.

Anatomical types of biliary atresia (BA)

French classification	Frequency	Description	Upper level of obstruction of the extrahepatic bile ducts	US/UK/Japanese classification
Type 1	~3%	Atresia limited to the common bile duct	Common bile duct	Type 1
Type 2	~6%	Cyst in the liver hilum communicating with dystrophic intrahepatic bile ducts	Hepatic duct	Type 2
Type 3	19%	Gallbladder, cystic duct and common bile duct patent	Porta hepatis	Type 3
Type 4	72%	Complete extrahepatic BA	Porta hepatis	Type 3