Fig. 3From: A rare case report of recurrent atypical meningioma with multiple metastases treated with anti-PD-1 and anti-VEGF therapyA Immunohistochemistry (IHC) revealed a significant increase in infiltration of CD4+ T lymphocyte, CD8+ T lymphocyte, and CD68+ macrophage in the tumor microenvironment compared with that before treatment (× 400). B The numbers of CD4+ T lymphocyte and CD8+ T lymphocyte also continued to increase as he tumor shrank in the peripheral bloodBack to article page