CD163 and neoplasm: IHC analyses further reveal that such tumor masses contained comparable levels of F4/80+ cells (pan macrophages, Fig. 2d), CD163+ cells (M2-macrophages, Fig. 2e), and CD204+ cells (M2-macrophages, Fig. 2f), suggesting that EndoMT-mediated tumor promotion was associated with infiltrating M2-macrophages.