Clinical Research Directory

Inclusion Criteria: 1.Pathologic diagnosis of pancreatic ductal adenocarcinoma；Diagnosis of CP defined as having obvious morphological features of CP (i.e., the presence of pancreatic calcifications on CT scan and/or magnetic resonance cholangiopancreatography)；Other benign disease populations without pancreatic lesions. Exclusion Criteria: 1. Pregnant women. 2. Patients with coagulation disorders who are unable to undergo blood tests. 3. Have a history of using antibiotics or probiotics within the past 3 months.