Higher expression of Stat3, cell proliferation-related factors (Met, P105, Fosl1 and Mki67), tumor-promoting-related factors (Arg, HIF, NOS2, TGFβ, Plau and VEGF) and cytokines (IL10, IL6 and CSF2) was found in macrophages that phagocytized apoptotic MCF-7 cells compared with cells that were not occulted with MCF-7 cells. This evidence concerns the gene NOS2 and neoplasm.