Table 1 Anatomical types of biliary atresia (BA)
From: Biliary atresia
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 |