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We propose a histopathological classification system for hippocampal cell loss in patients suffering from mesial temporal lobe epilepsies (MTLE). One hundred and seventy-eight surgically resected specimens were microscopically examined with respect to neuronal cell loss in hippocampal subfields CA1-CA4 and dentate gyrus. Five distinct patterns were(More)
OBJECT It is unknown whether different resection strategies for temporal lobe epilepsy (TLE) produce alterations in seizure control or neuropsychological performance. METHODS A series of 321 patients who underwent surgery for TLE between 1989 and 1997 was submitted to a uni- and multifactorial analysis of clinical, electrophysiological, neuroimaging,(More)
OBJECTIVE To explore several characteristics of patients with pharmacoresistant epilepsy without distinct lesions on magnetic resonance images (MRI(-)), who account for a relevant proportion of presurgical patient cohorts. DESIGN Retrospective case series. SETTING University epilepsy center. PATIENTS A cohort of 1200 patients who had comprehensive(More)
OBJECTIVE To describe the outcome of surgery in patients with drug resistant epilepsy and a histopathological diagnosis of focal cortical dysplasia. METHODS AND SUBJECTS Analysis of histories and presurgical and follow up data was carried out in 53 patients with a histological diagnosis of focal cortical dysplasia. Their mean age was 24.0 years (range 5(More)
PURPOSE Selective amygdalohippocampectomy (SAH) is a surgical treatment option for patients with medically intractable mesial temporal lobe epilepsy. In contrast to standard anterior temporal lobectomy, resection of unaffected tissue is limited, although it achieves equal seizure outcomes in selected patients. In SAH, the mesial structures can be approached(More)
OBJECT Parietal lobe epilepsy (PLE) accounts for a small percentage of extratemporal epilepsies, and only a few and mostly smaller series have been reported. Preoperative findings, surgical strategies, pathological bases, and postoperative outcomes for PLE remain to be elucidated. METHODS Patients with PLE were identified by screening a prospective(More)
BACKGROUND Highly selective epilepsy surgery in temporal lobe epilepsy is intended to achieve seizure freedom at a lower cognitive risk than standard en bloc resections, but bears the risk of collateral cortical damage resulting from the surgical approach. OBJECTIVE To investigate cortical damage associated with selective amygdalo-hippocampectomy (SAH).(More)
BACKGROUND Temporal lobe gray-white matter abnormalities (GWMA) are frequent morphological aberrances observed on MRI in patients with temporal lobe epilepsy (TLE) in addition to hippocampal sclerosis (HS). OBJECTIVE To study the influence of temporal pole GWMA on clinical characteristics and seizure outcome in patients with HS operated on for TLE. (More)
OBJECT Occipital lobe epilepsy (OLE) accounts for a small percentage of extratemporal epilepsies and only few and mostly small patient series have been reported. Preoperative findings, surgical strategies, histopathological bases, and postoperative outcomes for OLE remain to be elucidated. METHODS A group of 54 patients with occipital lobe involvement(More)
BACKGROUND Visual field defects are a common side effect after mesial temporal resections such as selective amygdalohippocampectomy (SelAH). OBJECTIVE To present a method of diffusion tensor tractography (DTT) of the Meyer loop for preoperative planning of the surgical approach for SelAH and for intraoperative visualization on a navigation-guided(More)