1. This study adopts a prospective, multicenter design, and classifies pancreatic cancer patients and predicts their prognosis through Lewis antigen detection and CA19-9 detection.
2. Observe the survival time of pancreatic cancer subjects to observe the consistency between Lewis typing and prognosis, and evaluate the sensitivity of Lewis antigen detection.
3. Evaluate the specificity of Lewis antigen detection by observing the distribution of Lewis subtypes in non pancreatic cancer subjects.
4. Explore the prognostic distribution of age, different Lewis subtypes, and overall survival cycle for Lewis antigen detection.
