Biliary atresia is a blockage in the tubes (ducts) that carry a liquid called bile from the liver to the gallbladder.
Biliary atresia occurs when the bile ducts inside or outside the liver do not develop normally. The reason why this happens is unknown.
The bile ducts help remove waste from the liver and carry salts that help the small intestine break down (digest) fat.
In babies with biliary atresia, bile flow from the liver to the gallbladder is blocked. This can lead to liver damage and cirrhosis of the liver, which can be deadly.
Newborns with this condition may appear normal at birth. However, jaundice (a yellow color to the skin and mucus membranes) develops by the second or third week of life. The infant may gain weight normally for the first month. After that point, the baby will lose weight and become irritable, and will have worsening jaundice.
Other symptoms may include:
The health care provider will perform a physical exam, which includes feeling the baby's belly area. The provider may feel an enlarged liver.
Tests to diagnose biliary atresia include:
An operation called the Kasai procedure is done to connect the liver to the small intestine. The abnormal ducts are bypassed. It is most successful if done before the baby is 8 weeks old. However, a liver transplant may still be needed.
Early surgery will improve the survival of more than one third of babies with this condition. The long-term benefit of a liver transplant is not yet known, but it is expected to improve survival.
Complications may include:
Call your provider if your child appears jaundiced, or if other symptoms of biliary atresia develop.
Reviewed By: Neil K. Kaneshiro, MD, MHA, Clinical Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.