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Fibrous Dysplasia
Fibrous dysplasia is a disease that causes growths or lesions in one
or more bones of the human body. These lesions are tumor-like growths
that consist of replacement of the medullary bone with fibrous tissue,
causing the expansion and weakening of the areas of bone involved.
Especially when involving the skull or facial bones, the lesions can
cause externally visible deformities. The skull is often, but not
necessarily, affected, and any other bone(s) can be involved. Many
patients have lesions localized in only one bone (monostotic, affecting
70-80%), but others have them in many bones (polyostotic).
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