Giant cell tumor
Four Radiographic Criteria
- Closed epiphyses
- Epiphyseal abutting articular surface
- Eccentrically located
- Sharp trasition zone that is not sclerotic
- These rules do not apply for flat bones (pelvis) or apophysis (greater trochanter).
- Cannot differentiate 15% of giant cell tumors which are malignant.
- No sclerotic margin.
Fog Machines or Fegnomashic