PDCD1 and hepatocellular carcinoma: In the present study, we found low-risk group tended to have higher IPS-CTLA4, IPS-PD1/PD-L1/ PD-L2, and IPS-PD1/PD-L1/PD-L2+CTLA4, implying that HCC patients with low-risk score could benefit more from immunotherapy than high-risk patients.