Table 1.

Immunohistochemistry demonstrates only weak IGF1R expression in uncultured cartilage tumours

Diagnose		Weak IGF1R positivity
Enchondroma		3/5 (60 %)
Osteochondroma		2/7 (29 %)
Central Conventional chondrosarcoma		32/71 (45 %)
	Grade I	8/28 (29 %)
	Grade II	15/29 (51 %)
	Grade III	9/14 (64 %)
Peripheral Conventional chondrosarcoma		14/34 (41 %)
	Grade I	8/21 (38 %)
	Grade II	5/10 (50 %)
	Grade III	1/3 (33 %)
Dedifferentiated chondrosarcoma		11/32 (34 %)
Mesenchymal chondrosarcoma		0/18 (0 %)
Clear cell chondrosarcoma		1/20 (5 %)
Total		63/187 (34 %)