Question
What are the three types of congenital biliary atresia?
Answer
Congenital biliary atresia is classified into three types based on the extent of blockage: Type 1 involves complete blockage of the bile ducts, gallbladder, and common bile duct; Type 2 has a space in the gallbladder while other extrahepatic bile ducts are blocked; and Type 3 features spaces in the gallbladder, cystic duct, and common bile duct with blockage of the bile duct. These three types account for 80-90% of biliary atresia cases.