The GLUT1 expression was significantly linked to the biomarkers of B cell (CD20, CD70, and CD79A), CD8+ T cell (CD8A and CD8B), macrophage (CD68), M1 macrophage (COX2), neutrophil (CD55 and CCR7), and dendritic cell (HLA-DPB1, HLA-DRA, HLA-DPA1, and CD1C) in PAAD. The gene discussed is CD8B; the disease is pancreatic adenocarcinoma.