Cerebrospinal fluid rhinorrhea and acquired anterior basal encephalocoele in a patient with colloid cyst of the third ventricle.

摘要

Colloid cyst of the third ventricle is a well known cause for obstruction at the foramen of Monro with consequent dilatation of lateral ventricles. The lesion is often stable even though acute obstruction with coma and death has been reported. Anterior basal encephalocele, usually due to a defect in the ethmoidal or sphenoidal bones, is congenital, traumatic or postoperative in origin. Rarely, long-standing raised intracranial pressure can result in this condition. The acquired variety is usually associated with defects in the vault or base of the skull. Patients with basal encephalocele can present with cerebrospinal fluid (CSF) rhinorrhea. We describe a female patient presenting with episodic headache, seizures and CSF rhinorrhoea found to have on imaging evaluation a colloid cyst of the anterior third ventricle with anterior basal encephalocele.