Final answer:
Biliary atresia is a pediatric liver disease where the bile ducts are blocked or absent, causing liver failure. Surgery is needed to create a new pathway for bile to drain from the liver.
Step-by-step explanation:
Biliary atresia is a pediatric liver disease characterized by the blockage or absence of the bile ducts, preventing the drainage of bile from the liver. This can lead to liver failure if left untreated. The main treatment for biliary atresia is surgery to create a new pathway for bile to flow out of the liver.