Congenital common bile duct cyst, also known as congenital bile duct dilatation, is a common pediatric surgical condition. The incidence is significantly higher in females than in males, and there are generally five types. Clinical manifestations:The typical symptoms are abdominal pain and/or obstructive jaundice. The typical triad:abdominal pain, jaundice, and mass. The abdominal pain is due to pancreatitis, or excessive blood amylase due to pancreatic amylase diffusion within the cyst. With advances in ultrasound technology, more and more common bile duct cysts are being detected by routine prenatal ultrasound. If the child has combined jaundice and biliary atresia has not been ruled out, surgical intervention should be performed quickly. If the child is in good general condition, surgery can be delayed until the first trimester. Delayed treatment can increase the risk of progressive liver fibrosis, cholangitis, or cyst perforation in the future. This article is published with permission from Dr. Wang Hefeng. Abdominal CT examination suggests common bile duct cyst Laparoscopy shows gallbladder and cyst Laparoscopic resection of gallbladder and cyst reveals common hepatic duct with right and left hepatic ducts visible inside Perforated common bile duct cyst with large omental envelope, bile staining, and stage I cyst external drainage