title: The patient had a normal magnetic resonance imaging and temporal lobe epilepsy secondary to a porencephalic cyst but showed structural lesions (hippocampal sclerosis).
abstract: Patients with a porencephalic cyst frequently develop intractable temporal lobe epilepsy (TLE). We report a surgically-treated male patient with intractable mesial TLE (mTLE) secondary to a porencephalic cyst. Although magnetic resonance imaging showed no hippocampal abnormalities, long-term video-electrocorticography revealed seizure onset discharges in the hippocampus. Temporal lobectomy brought an end to the patient's seizures. Hippocampal sclerosis was histopathologically confirmed (dual pathology). Careful evaluation of hippocampal epileptogenicity is required, and temporal lobectomy, which is less invasive than hemispherectomy, can be a treatment of choice for patients with mTLE secondary to a porencephalic cyst.
authors: Department of Neurosurgery, Tsukuba University Hospital, Japan.
authors: Teppei
authors: T
authors: Matsubara
authors: Department of Neurosurgery, Tsukuba University Hospital, Japan ; Department of Neurosurgery, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Japan.
authors: Satoshi
authors: S
authors: Ayuzawa
authors: Department of Neurosurgery, Ryugasaki Saiseikai Hospital, Japan.
authors: Tsukasa
authors: T
authors: Aoki
authors: Department of Neurosurgery, Seirei Hamamatsu General Hospital, Japan.
authors: Ayataka
authors: A
authors: Fujiomto
authors: Department of Neurosurgery, Tsukuba University Hospital, Japan.
authors: Satoru
authors: S
authors: Osuka
authors: Department of Neurosurgery, Tsukuba University Hospital, Japan ; Department of Neurosurgery, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Japan.
authors: Akira
authors: A
authors: Matsumura
keywords: Electrocorticography; Hippocampal sclerosis; MRI-negative temporal lobe epilepsy; Porencephalic cyst; Temporal lobectomy