Bone sarcoma

[3] Osteosarcomas are composed of mesenchymal cells that produce immature bone.

Ewing's is highly aggressive, typically developing from the medullary cavity of a bone with cells invading the Haversian system.

[5] An immunohistochemistry test shows the tumour as having small rounded blue cells.

[5] A chondrosarcoma is the type of bone cancer that starts in the cartilage cells.

Chondrosarcomas are classified by grade as a measurement of their growth rate – I, II, and III.