Choledochal Cyst (Congenital Choledochal Cyst; Choledochal Cyst, Type I; Common Bile Duct Cyst)
A congenital anatomic malformation of a bile duct, including cystic dilatation of the extrahepatic bile duct or the large intrahepatic bile duct. classification is based on the site and type of dilatation. Type I is most common.