Abstract:Objective To explore the clinical efficacy of endoscopic photodynamic therapy (PDT) in intraductal papillary mucinous neoplasm of the pancreas. Methods Data of 2 patients with IPMN of pancreas were collected in Shandong Provincial Third Hospital from July 2020 to August 2020. Low-grade papillary mucinous adenoma of the pancreas were all pathologically confirmed before surgery. Hematoporphyrin was injected intravenously 48 hours before surgery. The first endoscopic PDT was performed and the second PDT irradiation was performed 24 hours after the operation. Then we evaluate the success rate and complications of the PDT, and the clinical efficacy was also evaluated 18 months after PDT. Results Endoscopic PDT treatments were all successfully completed in 2 patients with a technical success rate of 100%. Case 1 received a total of 3 PDT treatments, and case 2 received a total of 1 PDT treatment. No complications such as acute cholangitis, acute pancreatitis, pancreatic leakage and pancreatic duct stricture occurred. No recurrence of adenoma was found in CT or MRCP at 18 months after operation. Conclusion Endoscopic PDT for IPMN of the pancreas is safe and effective, while it needs a large sample, multi-center clinical research to confirm its long-term efficacy.