IL10 and neoplasm: M2 macrophages possess a weak antigen-presenting ability, and secrete anti-inflammatory cytokines such as IL-10 or TGF-β, and down-regulate the immune response [88–90].Tumor-associated macrophages (TAMs) have been shown to be functionally plastic as a special type of macrophage, which are often described as M2-like population, but there is also evidence for the existence of M1-like population [91–93].In fact, in the early phase of tumor establishment, TAMs display an inflammatory phenotype, but an immunosuppressive phenotype is present at the later stages of tumor progression [94].