Unilateral exophthalmos caused by an anterior ethmoidal meningoencephalocele.

A case of unilateral enophthalmos in a 1-year-old child is presented. This was caused by a meningoencephalocele that originated in the anterior cranial fossa and protruded into the orbit through a bony defect at the junction of the frontal and ethmoid bones at the site of the anterior ethmoid canal. This meningoencephalocele was reduced, and the dura was repaired with a temporalis fascia graft. A split calvarial bone graft was inserted into the floor of the orbit, and lateral canthal ligament elevation completed the operative correction.