胆总管囊肿是相当罕见的，在西方国家每出生200万活婴约可见1例。在日本作者强调胰胆管合流异常在胆总管囊肿及其囊壁发生癌变中的作用。现今由于胰胆管合流异常导致胰液返流入明道已被认为在胆管癌的发病中起着重要的作用。作者对明总管囊肿施行肝外胆管切除以阻止胰液反流，? Common bile duct cysts are quite rare, and in Western countries about one in every two million live babies born. The authors in Japan emphasized the role of pancreaticobiliary duct anomalies in carcinogenesis of choledochal cyst and its cyst wall. Pancreatic duct reflux due to abnormal pancreatic duct reflux into the Ming Road has been considered in the pathogenesis of cholangiocarcinoma plays an important role. The author of the total tube cyst extrahepatic bile duct resection to prevent pancreatic juice reflux?