HNF4A and bladder transitional cell carcinoma: It was shown in our study that patients with high HNF4a expression showed a significantly longer overall survival (OS, p < 0.05) than patients with low HNF4a expression in BLCA, KIRC, and READ, while patients with high expression of HNF4a exhibited a significantly shorter OS (p < 0.05) than patients with low expression of HNF4a in LUSC (Figure 1).