CD274 and neoplasm: Our data showed that, in all qualified samples, no significant relationship between the tumor cell content and the PD-L1 expression level was observed (p-value = 0.27), and similar results were found in STAD (p-value = 0.15, Figure 2B), COAD (p-value = 0.76, Figure 2C), and READ (p-value = 0.41, Figure 2D) subgroups (Figure 2E).