CD274 and cancer: Pathways such as ‘Positive regulation of leukocyte migration’ and ‘Neutrophil migration’ were downregulated in the PD‐L1+ RPE group, while the ‘PD‐L1 expression and PD‐1 checkpoint pathway in cancer’ was upregulated, confirming the inhibitory effects of the PD‐1/PD‐L1 axis (Figure 6A,B).