What are the causes of biliary atresia?

What are the causes of biliary atresia?

The causes of biliary atresia are not known, but may include:

• Inflammation (swelling) and scarring caused by problems with the immune system
• Infection by a virus
• Exposure to harmful chemicals
• Mutations (changes) in the genes. (Biliary atresia is not inherited from the baby’s parents.)