YY1 and squamous cell lung carcinoma: 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.