Why do newborns have biliary atresia?

Patient's question:

I would like to inquire about what factors can lead to biliary atresia. Today, while chatting with a colleague, the topic came up unexpectedly. We are not very clear about it, so we want to understand what factors can cause biliary atresia in children.

Doctor's answer:

Early on, it was believed that the disease was a congenital abnormality of the biliary tract, associated with the arrest or disturbance of biliary system development during weeks 4 to 10 of embryonic development. However, anatomical studies of the biliary system in cases of miscarriage or premature infants have not identified any cases of biliary atresia. Instead, recent research has provided more evidence supporting the idea that the disease is acquired rather than congenital. Some affected infants are born with normal yellow stools, but develop grayish-white stools and jaundice within weeks, which also suggests that the biliary obstruction occurs after birth in these cases. Once a definitive diagnosis is made, surgical treatment should be performed promptly.

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