The proportion of CD4+CD25+Foxp3+, CD8+CD28−Treg in OC patients with lymph node metastasis was higher than that without lymph node metastasis according to the enhanced CT examination (Table 3, P < 0.05; Table 4, P < 0.05). The gene discussed is CD8A; the disease is metastatic malignant neoplasm in the lymph nodes.