- Idiopathic replacement of bone with fibrous tissue.
- It can affect just one bone (monostotic) or multiple bones (polyostotic). Jaw involvement is common (especially the maxilla).
- Clinical signs and symptoms: Painless, slow and progressive enlargement of the affected bone.
- Radiodensity: Initially ill-defined radiolucency, gradually fine trabeculae become evident to produce the typical ground glass or orange peel appearance.
Fibrous dysplasia (mixed)
- Cemento-Ossifying fibroma (2nd stage)
- Chondrosarcoma (mixed)
- Chronic Osteomyelitis (mixed)
- Metastatic tumors (mixed)
- Osteogenic sarcoma (mixed)
- Paget disease (mixed)