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Definition & Facts. Biliary atresia is a condition in infants in which the bile ducts outside and inside the liver are scarred and blocked. Bile can't flow into the intestine, so bile builds up in the liver and damages it. The damage leads to scarring, loss of liver tissue and function, and cirrhosis
Overall survival with a native liver (not transplanted) ranges from 30-55 percent at 5 years of age; and 30-40 percent at 10 years of age. It is thought that approximately 80 percent of patients with biliary atresia will require liver transplantation by the age of 20.