CD274 and neoplasm: Because, in our study, the expression of PD-L1 on peritumoral macrophages predicted a favorable prognosis, and PD-L1 expression on peritumoral macrophages was not correlated with PD-L1 expression on intratumoral macrophages, not only tumor tissue but also peritumoral tissue should be surgically removed and analyzed for PD-L1 expression.