BRD4 expression in HCC tumor tissues differed by and was positively correlated with American Joint Committee on Cancer (AJCC) cancer stage, with mean scores of 1.7 ± 0.2, 2.1 ± 0.1, 2.5 ± 0.1 and 2.6 ± 0.2 for stage I, II, III and IV samples, respectively (one-way ANOVA, p < 0.05, Spearman, p < 0.05; Figure S1A, Figure S1B, and Table S1). Here, BRD4 is linked to cancer.