Study advance of congenital biliary dilatation in children          LI Long, ZHANG Jin-shan, DIAO Mei. Department of Surgery,Capital Institute of Pediatyics,Beijing100020,China
Corresponding author: LI Long, E-mail: zjs851@163.com
Abstract    Congenital biliary dilatation is a pathologic condition characterized by varying degrees of congenital dilatation of the biliary system. Most of the reported cases come from Asia and its etiology remains unclear. The pathogenetic implications of pancreaticobiliary maljunction (PBM) is a popular hypothesis. If growth of the epithelium in the common bile duct fails to keep up with this anomalous elongation during embryonic, the duct may become attenuated, resulting in stenosis and weakness of the wall, and eventually dilatation. In the treatment, the cyst excision with Roux-en-Y hepatoenterostomy is the standard surgical method for choledochal cyst. To reduce the post operative complications, doctors need to learn about the changes of the biliary system, deal with the abnormblity in the intrahepatic bile duct, pancreatic duct and common channel.