KEGG analysis showed that the DEGs were majorly enriched in pancreatic secretion pathway and many immune-related signaling pathways including cytokine-cytokine receptor interaction, cell adhesion molecules, primary immunodeficiency, chemokine signaling pathway, and intestinal immune network for IgA production, T cell receptor signaling pathway, and Th1 and Th2 cell differentiation (Fig. 8B), which suggested that our model might be associated with the immunoregulation of PAAD. The gene discussed is CD79A; the disease is inborn error of immunity.