A Study on the Occurrence Time of Grade-B Pancreatic Fistula After Pancreatoduodenectomy

Inclusion Criteria: * Patients underwent Pancreatoduodenectomy (PD) or Laparoscopic pancreatoduodenectomy (LPD) surgery. * Surgery performed by the same surgical team. Exclusion Criteria: * PD or LPD combined with another organ resection. * PD or LPD performed due to trauma. * PD or LPD for emergency treatment, such as the rupture and bleeding of tumor. * Palliative resection. * Patients with severe organ dysfunction before surgery. * Patients treated with preoperative neoadjuvant chemotherapy or other treatments (Radiotherapy, targeted immunotherapy, etc.). * Patients with missing data for clinical or radiographic variables.