HNF4A and hepatocellular carcinoma: A positive correlation was also identified for the fold-change (HCC vs. normal) between circ_104075 and HNF4a [R = 0.949 (95% confidence interval: 0.780–0.995), p < 0.001] (Fig. 2e), which suggested that circ_104075 expression might be promoted by HNF4a.