CD274 and metastatic malignant neoplasm in the lymph nodes: Cervical cancer patients, with FIGO stages III-IV, tumor diameter ≥ 3 cm, deep muscle invasion, poor differentiation, lymph node metastasis, and vascular invasion (group A for short) had higher PD-L1 positive expression proportion in comparison with those with FIGO stages I-II, moderately high differentiation, tumor diameter < 3 cm, superficial muscular infiltration, nonmetastasis of lymph node, and vascular invasion (group B for short, χ2 = 8.741, 10.94, 12.41, 4.09, 15.72, and 6.144, P < 0.05).