Fig:Polyostotic Fibrous Dysplasia. Multiple osteolytic lesions in femur.
Polyostotic or multiple lesions
Most bone tumors are solitary lesions. If there are multiple or polyostotic lesions, the differential diagnosis must be adjusted.
Polyostotic lesions <> 30 years
Common: Metastases, multiple myeloma, multiple enchondromas.
Less common: Fibrous dysplasia, Brown tumors of hyperparathyroidism, bone infarcts.
Mnemonic for multiple oseolytic lesions: FEEMHI: Fibrous dysplasia, enchondromas, EG, Mets and myeloma, Hyperparathyroidism, Infection.
http://www.radiologyassistant.nl/en/494e15cbf0d8d#a4b331e94d0f15
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