CD274 and metastatic malignant neoplasm in the lymph nodes: There was no significant association between PD-L1 and age (p = 0.241), gender (p = 0.365), prior neoadjuvant therapy (p = 0.538), vascular invasion (p = 0.072), lymph node metastasis (p = 0.170), or clinical staging (p = 0.314).