As for B cells, CD4+ T cells, CD8+ T cells, neutrophils, and dendritic cells, their infiltration levels were significantly linked with HOXC4 expression in BLCA, BRAC, CESC, CHOL, COAD, GBM, HNSC, KIRC, KIRP, LGG, LIHC, LUAD, LUSC, MESO, OV, PAAD, PCPG, PRAD, READ, SARC, SKCM, STAD, TGCT, THCA, THYM, UCEC, UCS and UVM. This evidence concerns the gene HOXC4 and bladder transitional cell carcinoma.