Extended Pancreatic Transection Versus Conventional Pancreatic Transection During Laparoscopic Pancreaticoduodenectomy

Inclusion Criteria: 1. consecutive patients underwent elective laparoscopic pancreaticoduodenectomy within October 2019 to April 2023 2. the perioperative and follow-up study data information can be collected completely 3. The level of pancreatic neck dissection can be determined by postoperative abdominal CT 4. patients without the history of neoadjuvant chemotherapy or radiotherapy Exclusion Criteria: 1. conversion to laparotomy due to various reasons during operation; 2. combined with resection and reconstruction of the portal vein or the superior mesenteric vein 3. combined with other organ resection 4. the perioperative and follow-up study data information can not be collected completely, or the level of pancreatic neck dissection can not be determined by postoperative abdominal CT 5. patients with the history of neoadjuvant chemotherapy or radiotherapy 6. the main pancreatic duct did not be found during the operation, the duct-to-mucosa pancreaticojejunostomy could not be performed