Turkish Neurosurgery 2014 , Vol 24 , Num 1
Transethmoidal Encephalocele After Reduction of High Intracranial Pressure in Aqueductal Stenosis
Guive SHARIFI1, Ehsan ALAVI1, Maryam JALESSI2, Karim HADDADIAN1, Faezeh FARAMARZI1
1Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2Head and Neck Surgery Center, Rasool Akram Hospital, Tehran, Iran
DOI : 10.5137/1019-5149.JTN.6783-12.1 Acquired non-traumatic transethmoidal encephaloceles are very infrequent lesions that are generally caused by a tumor or hydrocephalus. As far as we know, there is no reported case of encephalocele after CSF diversion in the literature.

We present a 25-year-old woman with hydrocephalus due to aquiductal stenosis who was treated with endoscopic third ventriculostomy. Nine months later, she had developed rhinorrhea and on imaging she had a transethmoidal encephalocele. She underwent endonasal endoscopic repair of the defect and removal of herniated parenchyma.

CSF diversion to parasellar cisterns is not a known iatrogenic cause of basal encephalocele and is not noted elsewhere as a complication of third ventriculostomy. However, as third ventriculostomy is performed usually for intracranial hypertension treatment and intracranial hypertension itself is a known but rare cause of lacunar skull defect and encephalocele, this co-incidence may occur. Keywords : Encephalocele, Rhinorrhea, Hydrocephalus, Stenosis

Corresponding author : Ehsan Alavı, ehsanalavi1978@yahoo.com