Figure 1
Fibrous dysplasia with encephaloceles in Case 1. (A) Head CT demonstrates mottled ground-glass expansion of the right petrous temporal bone (arrow) and a dysplastic right sphenoid wing (thin arrow), consistent with fibrous dysplasia. (B-D) MRI (axial, sagittal, and coronal sequences) shows a right sphenoid wing encephalocele (arrow) with cerebral parenchyma herniating inferiorly-medially into an osseous defect. (E) MRI (axial) shows an additional, more lateral, temporal encephalocele (arrow). There were also changes of fibrous dysplasia in the right mandible (not shown).