Localized craniofacial fibrous dysplasia in a young girl.

We consider here the case of a young girl presenting a cystic bone mass in the left orbital roof. Although standard X-rays at first were not convincing, the findings on the CT examination and the histological aspect of the mass were typical of fibrous dysplasia. Although the exact diagnosis of fibrous dysplasia can only be made upon precise histological examination, radiological, and more specifically CT findings, may indicate this pathology.