STAT3 and neoplasm: * Inflammatory cytokines sustained CD90+ CSCs in tumor cells, and had a profoundability to increase tumor cell stemness, EMT and migration.* The soluble mediators induced predominantly the activation of NF-kB and STAT3.Activation of HER2/EGFR-Src was also described.* Regulation of EMT-related transcription factors was induced by the soluble mediators,or was linked to their activity.