MIDDLE FOSSA CYST PRESENTING AS A DELAYED COMPLICATION OF TEMPORAL LOBECTOMY - CASE-REPORT

SYMPTOMATIC MIDDLE FOSSA cysts have not previously been described as c omplications of temporal lobectomy that has been performed to control complex partial seizures. A patient is described who developed a middl e fossa cyst causing mass effect, intracranial hypertension, and neuro logical deterioration >2 years after temporal lobectomy for complex pa rtial seizures. An enlarging cyst with cerebrospinal fluid imaging cha racteristics was detected on neuroimages 1 year before neurological de terioration. The patient was treated by the insertion of a cystoperito neal shunt for cerebrospinal fluid diversion. The potential causes of an acquired arachnoid cyst and hydrocephalus are discussed.