Fecal and Oral Microbiota Between Pancreatic Cancer and Benign/Low-grade Malignant Tumor Patients

Inclusion Criteria: * Patients with a pancreatic tumor detected via imaging with no prior treatment before sample collection * Patients volunteer to provide oral and fecal samples Exclusion Criteria: * Current or previous diagnoses of (a) other malignancies, (b) infectious diseases, (c) oral or gastrointestinal disorders (d) psychiatric or neurodegenerative disorders * Specific medical procedures or interventions within defined periods, including (a) antibiotic, hormone therapy, or immunosuppressant within the past three months, (b) gastrointestinal reconstructive surgery within the past three months, (c) frequent use of cathartics, antidiarrheals, or therapeutic doses of probiotics within the past month, (d) oral or gastrointestinal examinations within the past three days