A. MHCII and MRC1 immunohistochemistry on a section of 3-5 weeks growth glioma implanted in ROSAmT/mG::Pdgfb-iCre mouse. M1 macrophages, preferentially located in hypoxic area, are abundant at 3 weeks and their number decreases at 5 weeks. M2 macrophages, preferentially located around blood vessels, are present at a low level at 3 weeks and their number increases at 5 weeks.Scale bars: A: 200µm; 