Among them, EPOR expression was negatively correlated with tumor purity in COAD (r = -0.212) and positively correlated with tumor purity in KIRC (r = 0.154); EPOR expression was negatively correlated with CD8 + T cell expression in LUAD (r = -0.128) and negatively correlated with dendritic cell expression in KIRC (r = -0.171). This evidence concerns the gene CD8A and neoplasm.