Giant cyst of the septum pellucidum

Abstract
Symptomatic cysts of the septum pellucidum are rare. A 9-wk old girl was hospitalized because of disproportionate progressive enlargement of the head, lumbar myelomeningocele and a history of generalized seizures. A giant septum pellucidum cyst was demonstrated on Conray ventriculography and later on computerized tomography scanning. Aqueductal stenosis was suspected. The cyst was excised at craniotomy. A ventriculoperitoneal shunt was required to treat the accompanying hydrocephalus.