PDCD1 and neoplasm: Although most of the tumors displayed high expression of both PD-1 (HR 1.0, 95% CI, 0.9–1.0, p = 0.06) and PD-L1 (HR 1.0, 95% CI, 0.3–3.7, p = 0.48), the expressions of these proteins in the TME and tumor center were not correlated with OS (Figures 5C,F).