Furthermore, PD-L1 overexpression was correlated with a higher rate of tumor metastasis (OR 2.95, 95% CI 1.32-6.60, <i>P</i> < 0.01), a more advanced tumor grade (OR 3.63, 95% CI 2.55-5.16, <i>P</i> < 0.01), and more T lymphocyte infiltration (OR 5.55, 95% CI 2.86-10.76, <i>P</i> < 0.01). This evidence concerns the gene CD274 and neoplasm.