Abstract
A 35-year-old male complained of right otalgia and conductive hearing loss. CT-scanning showed dehiscence of the anterior bone plate of the occipital fossa and herniation of the brain into the middle ear.
Mastoid exploration revealed a mass with a partially thinned dura mater and leakage of cerebrospinal fluid. The thinned dura mater was covered by lyophilized dura with bio-bond.
In view of this case report, the following points should be kept in mind.
1) Application of CT-scanning is recommendable for the diagnosis of meningoencephalocele.
2) A transcortical approach to the mastoid antrum must be carefully performed, taking meningoencephalocele into account.
3) Damage of the dura mater can be repaired with lyophilized dura.
