1. Osteosarcoma
Second / Third decade, M>F
- calcaneal
- diagnosis often delayed
- treat with radical resection
2. Chondrosarcoma
Middle age or older
- slow growing
- malignant change of osteochondroma / enchondroma
- treat with wide / radical resection
3. Ewing's
Lytic expansile mass in a MT
- can be anywhere
- Treat with wide resection / chemo / DXRT
4. Metastatic Tumours
Infrequent
- <1% all bony metastases
- often lung
- often below the diaphragm (i.e. ovarian)