Table 1.

AJCC system for osteosarcoma of Jaws [11]

Stage	Histological grade	Size of tumour	Metastasis
I-A	Low	< 8 cm	None
I-B	Low	> 8 cm	None
II-A	High	< 8 cm	None
II-B	High	> 8 cm	None
III	Any	Any	Skip metastasis
IV-A	Any	Any	Lung metastasis
IV-B	Any	Any	Non pulmonary metastasis