There was no significant relationship between the percentages of BDCA-1+CD19−PD-L1+/PD-L2+ or BDCA-2+CD123+PD-L1+/PD-L2+ DCs in PB, PF, and tumor tissue and the clinicopathological characteristics of the OC patients, i.e., the FIGO stage, grade, types of OC, age, menopausal status, and Ca125 concentration (p > 0.05). The gene discussed is PDCD1LG2; the disease is neoplasm.