Fibro-osseous dysplasia localized to the zygomatic arch: case report.

Fibrous dysplasia is an osseous growth disorder, producing immature bone characterized by the replacement of normal bone with fibro-osseous connective tissue. The therapy is surgical, but the diagnosis of fibrous dysplasia of the craniofacial bones is not in itself an indication for treatment. The authors present a rare case of a zygomatic arch localization of fibrous dysplasia causing considerable facial asymmetry and social impairment. The clinical and radiological features are presented, the surgical procedure and indications are then described and the histopathological findings are discussed.