IL11 and thyroid tumor: Interleukin (IL)-11 is a member of the IL-6 family of cytokines and exerts pleiotropic effects, conferring protection in the intestine, promoting tumorigenesis in gastrointestinal, breast, and thyroid tumors, regulating macrophage differentiation, and stimulating hemopoiesis and thrombopoiesis; however, IL-11 regulatory mechanisms in vivo remain unclear.