DRD3 and hepatocellular carcinoma: The results of immunohistochemical staining and Kaplan–Meier analysis showed that HCC patients with high DRD3 protein expression had significantly better RFS and OS compared with the patients with lower DRD3 protein expression (P < 0.05), and the multivariate Cox regression analysis results suggested that DRD3 is an independent factor related to the RFS and OS of the HCC patients (P < 0.05).