For paired tumor and normal tissue analysis in TCGA tumors, we found that CMTM3 is highly expressed in BLCA, LUAD, COADREAD, COAD, CHOL, HNSC, KIRC, ESCA, KIRP, LIHC, STAD, THCA, OSaCC, and ESAD cancer tissue compared to normal tissue. This evidence concerns the gene CMTM3 and bladder transitional cell carcinoma.