CD274 and metastatic malignant neoplasm in the lymph nodes: The results of this study showed that PD-L1 expression has no significant relationship with TNBC patients' age, menopausal status, p53 expression, etc. PD-L1 patients present with tumors ≥2 cm, histological grade III, lymph node metastasis, and Ki-67 expression ≥20%.