Administration of IL-33 in a murine model of breast cancer resulted in increased tumor growth and development of metastases, which correlated with increased intra-tumoral numbers of IL-13-producing innate lymphoid cells (ILCs), IL-13 receptor 1-expressing myeloid-derived suppressor cells (MDSCs), and regulatory T cells (T-regs) (72). This evidence concerns the gene IL13 and neoplasm.