CD274 and neoplasm: Regardless of cell type measured, PD-L1 expression correlated with PFS when using a threshold of >5% when measured on either tumor cells (n = 10, 8; HR = 0.31, 95% CI = 0.047–0.48) or non-tumor cells (n = 7, 11; HR = 0.36, 95% CI = 0.098–0.67) (Figure 2E).