Choledochal cyst following operation for idiopathic perforation of the biliary tract in childhood.

Three patients with idiopathic perforation of the biliary tract who had been treated by a drainage procedure, had a choledochal cyst during 2-8 years of follow up. In all patients, anomaly of pancreaticobiliary duct was revealed by cholangiography and/or retrograde cholangiopancreaticography. It was strongly suggested that biliary perforation in childhood and congenital choledochal cyst are common in pathogenesis and that an anomalous arrangement may play an important causative role.