wide resection
Parosteal Osteosarcoma
Epidemiology
Uncommon
- 4% OS
Females more common
- similar to GCT
NHx
Less aggressive locally
- less metastasis
- size / location & duration of symptoms don't correlate with outcome
Arise from cortex of bone / periosteum
- parosteal
- periosteal
- high grade juxtacortical
Chondrosarcoma
Definition
Malignant cartilage producing tumour
Epidemiology
20% of primary bone tumours
3rd most common
- 1 in 500 000
Relatively non-aggressive / usually Grade I
Average age 40
Male > Females
Two Distinct Types
1. Primary Chondrosarcoma
Arises de novo