Table 2. .

The histology of all 34 high-grade head and neck osteosarcomas

Histological subtypes	Primary	Radiation-induced osteosarcoma	Total
Osteoblastic	7	12	19
Chondroblastic	7	1	8
Fibroblastic	2	3	5
Giant cell-rich	2	0	2
Total	18	16	34