CD274 and breast cancer: Among patients with PD-L1 data (Table 2), the prevalence of PD-L1-high status was 52.8% in BC (n = 1344), 33.2% in OC (n = 2065), 32.4% in NSCLC (n = 9434), 13.2% in PC (n = 486) and 5.1% in CRC (n = 1656).