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. The gene discussed is CD8A; the disease is testicular germ cell tumor.