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Objective: To investigate the frequency of epileptiform discharges associated with self-limited focal epilepsy (EDSelFEC) in children who have undergone a hemispherotomy and to evaluate whether patients with coexistence of EDSelFEC and structural hemispheric epilepsies differ from patients without coexistence of EDSelFEC and whether there are differences between the two groups with regard to preoperative management and postoperative outcome.

Methods: Data on 131 children who underwent a hemispherotomy between January 1999 and January 2015 were retrieved from the Epilepsy center's epilepsy surgery database. Children with EDSelFEC were compared with children without EDSelFEC with respect to epileptogenic hemispheric pathology, family history, age at epilepsy onset, timing of surgery, lesion laterality, preoperative cognitive function, response to sodium channel blocker antiepileptic medication, and surgical outcome.

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Rasmussen encephalitis (RE) is a rare and progressive form of chronic encephalitis that typically affects one hemisphere of the brain and primarily occurs in pediatric individuals. The current study aims to narratively review the literature about RE, including historical information, pathophysiology, and management of this condition. RE often occurs in individuals with normal development, and it is estimated that only a few new cases are identified each year in epilepsy centers.

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Hemispheric surgery in children: perisylvian technique.

Neurosurg Focus Video

July 2024

Department of Surgery and Anatomy, Division of Pediatric Neurosurgery, Center for Epilepsy Surgery in Children, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.

Hemispheric epilepsy is quite frequent in children, compared with adults, and encompasses pathological substrates as diverse as hemimegalencephaly, Rasmussen encephalitis, Sturge-Weber syndrome, and porencephaly, among others. These patients most often become pharmacoresistant and thus require surgical management. Although anatomical hemispherectomy is a possibility, the technique that is favored by most epilepsy surgery centers worldwide is functional hemispherotomy, which results in equivalent outcomes with fewer postoperative complications.

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Introduction: Hemispherectomy/hemispherotomy has been employed in the management of catastrophic epilepsy. However, initial reports on the associated mortality and morbidity raised several concerns regarding the technique's safety. Their actual, current incidence needs to be systematically examined to redefine hemispherotomy's exact role.

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Vertical hemispherotomy is an effective treatment for many drug-resistant encephalopathies with unilateral involvement. One of the main factors influencing positive surgical results and long-term seizure freedom is the quality of disconnection. For this reason, perfect anatomical awareness is mandatory during each step of the procedure.

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