Fibrous dysplasia of Sphenoid bone

Fibrous dysplasia is a developmental anomaly that can affect any bone in the body. The skull and facial bones are the affected sites in 10-25% of patients with monostotic fibrous dysplasia and in 50% of patients with polyostotic fibrous dysplasia.
MR imaging characteristics of fibrous dysplasia do not share the distinctive features seen on radiography and CT. In fact, the MR imaging appearances of fibrous dysplasia often resemble that of tumors.

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