Choledochal cysts are a rare congenital abnormality that affects the biliary system. These cysts can occur anywhere along the biliary tract and can cause serious health problems, such as cholangitis, pancreatitis, and even liver failure. There are several synonyms for the term choledochal cysts, including biliary cysts, bile duct cysts, and cystic dilatation of the bile duct. Other terms that may be used to describe this condition include choledochal malformation or choledochal anomaly. While rare, it is important for individuals with this condition to receive early treatment to avoid potential complications and improve their overall health outcomes.