Giant aneurysms have rarely been reported in association with intracta
ble complex partial seizures We report a 30-year-old man with intracta
ble CPS since age 18 years. Seizure onset was electrically localized t
o right temporal lobe. Preoperative neuroimaging studies showed a part
ially thrombosed giant aneurysm of the right posterior cerebral artery
. Selective amygdalohippocampectomy and occlusion of the posterior cer
ebral artery did not cause deficits. The patient has been seizure-free
for 15 months after operation. We review the relevant literature on a
neurysms as a cause of epilepsy.