CD274 and metastatic malignant neoplasm in the lymph nodes: As for the remaining analyses of PD-L1 expression with age (P = 0.73; I2 = 0%), Gleason score (P = 0.14; I2 = 42%), pathologic stage (P = 0.23; I2 = 28%), lymph node metastasis (P = 0.69; I2 = 0%) and androgen receptor status (P = 0.55; I2 = 0%), there was no evidence of substantial heterogeneity.