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Biliary atresia is a set of congenital defects of the bile duct that prevents the normal flow of liver products either because the duct is narrow, blocked or absent. It presents with one or more of jaundice, pale colored stool (from the lack of bile products), dark colored urine, a swollen abdomen or an enlarged liver.

It is inevitably fatal if untreated, but usually can be treated with surgery to re-build or repair the duct. In some cases, a liver transplant may be necessary. It is more common in Asian and African populations, and less common in European populations, most likely due to a genetic propensity.

Biliary atresia at Wikipedia

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