Fig 3.

Acquired orbital meningoencephalocele in a patient with osteopetrosis (patient 7). Coronal CT scan (A) through the orbits shows intraosseous spheric defect on the roof of the left orbit with intracranial canal connection. Notice additional intraosseous orbital defects in the roof of the right orbit. Coronal FSE T2-weighted image (B) shows an encephalocele contained within the roof of the left orbit and raises questions concerning the contents of the right osseous roof defects. Intrathecal Gd-DTPA-enhanced coronal T1-weighted SE fat-saturated image (C) shows free CSF communication between the brain and left orbital roof defect and an encephalocele contained within the cavity. No additional CSF leaks are seen within the bony defects on the right orbit roof, excluding a bilateral surgical subfrontal approach.