KCNQ1OT1 and osteosarcoma: lncRNA KCNQ1OT1 sponged miR-34c-5p in the capacity of a competitive endogenous RNA (ceRNA), hence inhibiting the development of osteosarcoma cells in vivo, and prevented the in vivo proliferation of osteosarcoma cells by directly targeting its 3’Untranslated.