Fibrous dysplasia

Can look like almost anything
Should not be a painful lesion unless fracture
Ribs commonly involved
- Typically lytic expansile lesion in posterior ribs and sclerotic process in anterior ribs
Pelvic involvement very commonly accompanied by femoral involvement
- But not vice versa (ie. femoral lesions can be isolated)
If a tibial lesion is present that looks like fibrous dysplasia, have [[Adamantinoma|adamantinoma]] on the differential