* IFNγ-expressing CD8+ and IFNγ-expressing CD4+ T cells ↑* Anti–PD-L1 enhanced antiangiogenic efficacy in pNET and BC, but not GBM* PD-L1 expression on relapsing tumor cells ↑* Vessel normalization ↑ by PD-L1 blockade and formation of HEVs ↑ via LTβR. Here, CD4 is linked to breast cancer.