Polyostotic versus Monostotic
Non-aggressive polyostotic lesions
- Fibrous dysplasia
- Paget's disease
- Histiocytosis
- Multiple exostosis
- Multiple enchondromatosis
Aggressive polyostotic lesions
- metastases
- Multiple myeloma
- Primary bone tumor with osseous metastases
- An aggressive phase of Paget's disease
- Multifocal osteomyelitis
- Aggressive histiocytosis
- Multifocal vascular bone tumors
Metastasis
Solitary
- rare
- thyroid
- kidney
Appearance
- moth eaten
- wide zone of transition
- no sclerotic rim
Purely lytic
- lung
- breast
- kidney
- thyroid
- GI
- neuroblastoma
Blastic
- prostate
- breast
- bladder
- lung
Mixed
- breast
- prostate
- lung
Non-aggressive
Fibrous dysplasia
Paget's disease
Histiocytosis
Multiple exostosis
Multiple enchondromatosis
Aggressive
Osseous metastases
Multiple myeloma
Primary bone tumor with osseous metastases
An aggressive phase of Paget's disease
Multifocal osteomyelitis
Aggressive histiocytosis
Multifocal vascular bone tumours