Summary of thirteen case reports of the use of immune checkpoint inhibitors (ICPIs) in the post-liver transplant setting as palliative therapy for patients with HCC; ICPI: Immune Checkpoint Inhibitors, M: male, F: female, PD-1: Programmed Death, mg: milligram, D: death, MMF: Mycophenolate mofetil, UK: unknown, IST: immunosuppressive therapy, PD: a progressive disease. This evidence concerns the gene PDCD1 and hepatocellular carcinoma.