Interestingly, STAT3 was significantly correlated with infiltrating levels of B-cells in 4 cancer types (KICH, KIRC, PRAD, and READ), CD8+ T-cells in 5 cancer types (BLCA, COAD, KICH, KIRC, and PRAD), CD4+ T-cells in 4 cancer types (BLCA, COAD, KIRC, and PRAD), macrophage in 4 cancer types (COAD, KICH, KIRC, and PRAD), neutrophils in 7 cancer types (BLCA, CESC, COAD, KIRC, LIHC, PRAD, and READ), and DCs in 7 cancer types (BLCA, CESC, COAD, KICH, KIRC, PRAD, and READ). This evidence concerns the gene CD4 and bladder transitional cell carcinoma.