CD274 and neoplasm: Moreover, we observed a higher percentage of BDCA-2+CD123+ DCs with PD-L1 in peripheral blood of the control group than in PB (p < 0.0001; median 63.44% vs. 14.40%), PF (p < 0.001; median 63.44% vs. 23.85%), and tumor tissue (p < 0.01; median 63.44% vs. 36.36%) of OC patients.