CD274 and neoplasm: The expression levels of PD-L1 on tumor cells (TC-PD-L1), PD-L1 on immune cells in the stroma (IC-PD-L1), PD-L2 on tumor cells (TC-PD-L2), PD-L2 on immune cells in the stroma (IC-PD-L2), HLA-class I expression, and CD8+TIL density, are shown in Table 1.