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Biliary atresia is a blockage in the tubes (ducts) that carry a liquid called bile from the liver to the gallbladder. The condition is type of birth defect (congenital condition).
Biliary atresia occurs when the bile ducts inside or outside the liver do not develop normally. It is not known why the biliary system fails to develop normally.
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 is deadly if not treated.
Newborns with this condition may appear normal at birth. However, jaundice develops by the second or third week of life. The infant may gain weight normally for the first month, but then will lose weight and become irritable, and have worsening jaundice.
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