CD8A and neoplasm: Univariate COX analysis showed that RFS was correlated with tumor size (P = 0.030), mitotic index (P <0.001), NIH risk grade (P = 0.007), cell type (P = 0.005), CD8+ T cells (P = 0.004) and PD-L1 expression (P = 0.024) (Table 4).