Diagnosis and treatment of Type Ⅲ congenital biliary dilatation        WU Zhi-yong, CHEN Wei. Department of General Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200127, China
Corresponding author: WU Zhi-yong, E-mail:zhiyongwu@gmail.com
Abstract    Type Ⅲ congenital biliary dilatation (CBD) is a rare type of biliary malformation disease. It is also called cyst prolapse of the terminal common bile duct, cyst of terminal choledochus or choledochocele. Endoscopic ultrasonogram, magnetic resonance cholangiopacreatography (MRCP) and endoscopic retrograde cholangiopancreatography (ERCP) are very important for the diagnosis. It is recommended that endoscopic unroofing and/or sphincterotomy is the first therapeutic method because of low-risk for malignancy.