[Emphasize the standardized diagnosis and treatment of pancreatic segment choledochal cyst]

The pancreatic segment choledochal cyst is deeply located, prone to recurrent inflammation and adhesions with surrounding tissues, and exhibits various confluence patterns between the cyst terminus and the main pancreatic duct. Therefore, the safe and complete resection of the diseased bile duct in the pancreatic segment represents the core challenge in treating this condition. Accurate preoperative assessment is essential for surgical safety and should focus on delineating the location and extent of cyst, the anatomy of the hepatic artery and portal vein, as well as the confluence pattern of the biliary and pancreatic ducts. Meticulous intraoperative technique is key to ensuring therapeutic efficacy and safety. The intrapancreatic plate lowering technique should be employed to fully expose the pancreatic segment bile duct, achieve complete cyst resection, and perform a high-quality choledochojejunostomy to ensure long-term patency and improve the patient's quality of life. Predictive management of postoperative complications is a critical aspect of enhancing overall outcomes. The standardized diagnosis and treatment of pancreatic segment choledochal cysts must integrate preoperative evaluation, intraoperative techniques, and postoperative management to achieve a balance between radical cure and safety.