
Keywords: گره های لنفی مثبت; Pancreatic neuroendocrine neoplasms; Lymph node metastases; Surgery; Pancreaticoduodenectomy; Prognosis; Disease-free survival; PanNENs; Pancreatic Neuroendocrine Neoplasms; PD; pancreaticoduodenectomy; PLN; positive lymph nodes; ELN; examined lymph nodes