APC	Antigen-presenting cells
CAR-T	Chimeric antigen receptor T
ChT	Chemotherapy
COG	Children’s Oncology Group
DC	Dendritic cells
GM-CSF	Granulocyte-macrophage colony stimulating factor
HER2	Human Epidermal growth factor Receptor 2
Hh	Hedgehog
ICI	Immune checkpoint inhibitors
IGF	Insulin-like growth factor
IGF-1R	IGF-1 receptor
IL	Interleukin
INF	Interferon
miRNA	microRNA
mTOR	Mammalian target of rapamycin
NK	Natural killer
OS	Osteosarcoma
PD-L1	Programmed cell death ligand 1
PD-1	Programmed cell death protein 1
PDGF	Platelet-derived growth factor
PDGFR	Platelet-derived growth factor receptor
PD-L1	Programmed cell death ligand 1
Ptch	Patched
PTHrP	Parathyroid hormone- related peptide
RANKL	Receptor activator of nuclear factor kappa-Β ligand
Smo	Smoothened
TGF	Transforming growth factor
Th	T-helper
TNF	Tumor necrosis factor
Treg	Regulatory T cells
uPA	Urokinase plasminogen activator
VEGF	Vascular endothelial growth factor