________ Primarily involved in extrahepatic biliary atresia
A)A
B)B
C)C
D)D

Question

________ Primarily involved in extrahepatic biliary atresia
A)A 
B)B 
C)C 
D)D

Quizplus · Accepted Answer

In extrahepatic biliary atresia,parts of the hepatic ducts and bile duct are not canalized.Parts of the bile ducts are blocked (atresia);other parts may have narrow lumina (stenosis).These severe anomalies are not common.The extrahepatic system of bile ducts develops as solid cords that typically soon become canalized.When this fails to occur,atresia results.If the lumen forms but is small,stenosis is present.Congenital atresia of the bile ducts may be caused by noxious agents acting during the development of the bile duct system.There is little evidence that this anomaly is hereditary;it rarely occurs in siblings (brothers or sisters).Jaundice gradually increases after birth;the stools are clay-colored,and the urine is dark brown.

________ Primarily Involved in Extrahepatic Biliary Atresia