Although there was no direct association between tumor stage/grade and HLA-I or PD-L1 expression analyzed separately, we saw interesting results when we combined HLA-I and PD-L1 expression and classified tumors into the following four groups: 1) HLA-I+/PD-L1+, 2) HLA-I+/PD-L1–, 3) HLA-I-/PD-L1+ and 4) HLA-I-/PD-L1–. Here, CD274 is linked to neoplasm.