Rare cartilage tumour
1% of bone tumours / rare
- typically in adolescents
Usually benign
- but aggressive / frankly malignant behaviour reported
- locally aggressive
- can have pulmonary metastasis
Expansile pseudotumor of reactive hemorrhagic tissue arising in bone
- characterised by blood filled spaces separated by fibrous tissue
Primary 50%
- arise de novo
Secondary 50%
- in association with other tumours
- probably secondary to haemorrhage into 1° tumour
- GCT / chondroblastoma / osteoblastoma / osteosarcoma