Diagnosis of Pancreatic Cancer by Purine Metabolite (Hypoxanthine, Xanthine) in Urine

1. pancreatic cancer group Inclusion Criteria: * Pancreatic ductal adenocarcinoma that is pathologically confirmed or shows characteristic radiologic features * Patients with resectable pancreatic cancer at the time of surgery (Including borderline resectable pancreatic cancer at the time of diagnosis or Locally advanced pancreatic cancer after chemotherapy or radiation therapy) * Patients without invasion of adjacent organs other than the left adrenal gland and mesocolon * Patients with informed consent Exclusion Criteria: * History of other malignancy (Inclusive if there is no evidence of recurrence after 5 years of treatment) * Patient with Inflammatory disease(e.g. severe pancreatitis, cholangitis) * Patients with underlying diseases at high risk of general anesthesia * Other subject whom the investigator deems inappropriate 2. control group Inclusion Criteria included healthy individuals as well as patients with benign diseases. Exclusion criteria for the control group included a previous cancer diagnosis within the past five years, active inflammatory diseases, borderline malignant pancreatic tumors, or a postoperative pathological finding of malignancy.