CD274 and neoplasm: If 50% TPS was used as a threshold, 2/30 (6.6%)of the metastatic lesions had inconsistent PD-L1 expression compared to the primary tumor tissue (k = 0.78, and P < 0.001), among which, 1 (3.3%)cases had reduced PD-L1 expression and 1 (3.3%) case had increased PD-L1 expression in the metastasis lesions.