Our results noted that CD8A were correlated with six major immune cell types in TME of multiple cancer types (Figure 4A), including BRCA, COAD, esophageal carcinoma (ESCA), HNSC, KIRC, KIRP, LIHC, LUAD, LUSC, pancreatic adenocarcinoma (PAAD), PRAD, sarcoma (SARC), SKCM, testicular germ cell tumor (TGCT), UCEC, and some of their specific cancer subtypes. This evidence concerns the gene CD8A and pancreatic adenocarcinoma.