CD4 and metastatic malignant neoplasm in the lymph nodes: Combined with the above results, we proved that the high abundance of CD4+ Treg and CD8+ Treg subpopulations but not CD3+γδ T cell subpopulations were associated with FIGO stage, lymph node metastasis, and distant metastasis status at the diagnosis of OC patients (Table 3, Table 4 and Table 5).