IL11 and osteosarcoma: A study found that IL‐11Rα receptors were highly expressed on the surface of osteosarcoma tumor cells, and synthesized redox reaction‐sensitive polymer nanoparticles functionalized with IL‐11 ligands to promote intratumoral accumulation of doxorubicin and reduce side effects, which provided a new drug delivery method for clinical chemotherapy of osteosarcoma [48].