镜下见，肝外胆道闭锁导致肝脏大量黄绿色胆栓、假胆管增生（见于下面的中央）、广泛纤维化。如果有足够大的胆管可进行吻合并提供胆汁引流，该病即能够通过手术治愈。
Microscopically, extrahepatic biliary atresia leads to this appearance in the liver, with numerous brown-green bile plugs, bile duct proliferation (seen at lower center), and extensive fibrosis. If a large enough bile duct can be found to anastomose and provide bile drainage, then surgery can be curative.
