As shown in Figure 1(a), the expression levels of YY1 in the tumor tissues of bladder urothelial carcinoma (BLCA), BRCA, CHOL, ESCA, HNSC, LIHC, LUAD, lung squamous cell carcinoma (LUSC), stomach adenocarcinoma (STAD) (P < 0.001), COAD (P < 0.01), CESC, and glioblastoma multiforme (GBM) (P < 0.05) were higher than the corresponding control tissues. This evidence concerns the gene YY1 and bladder transitional cell carcinoma.