Ossifying Fibromyxoid Tumor
Differential Diagnosis
Osteosarcoma | Ossifying Fibromyxoid Tumor |
---|---|
Cytologic atypia | Bland cytology |
Tumor of bone | Most are superficial and small |
Atypical "tumor" bone | Normal appearing lamellar bone |
Glomus Tumor | Ossifying Fibromyxoid Tumor |
---|---|
No ossification | Frequent ossification |
Actin positive, S100 negative | Actin variable, most are S100 positive |
Myxoid Chondrosarcoma | Ossifying Fibromyxoid Tumor |
---|---|
No peripheral ossification | Frequent peripheral ossification |
Most are deep and large | Most are superficial and small |
PAS positive | PAS negative |