CD8A and hepatocellular carcinoma: To better understand the phenotypic characteristics and functional status of PD1Hi, PD1Int and PD1− CD8+ TILs in HCC, we performed a comprehensive characterization of these cells by flow cytometry, including 64 cluster of differentiation (CD) surface markers, 24 transcription factors, 18 chemokine receptors and 10 cytokine receptors.