False lateralization on scalp EEG on mesial temporal epilepsy due to hippocampal sclerosis – cases report [Abstract in English]

Detalhes bibliográficos
Autor(a) principal: Paglioli Neto, Eliseu
Data de Publicação: 2007
Outros Autores: Wainberg, Ricardo, Freitas, Otávio
Tipo de documento: Artigo
Idioma: por
eng
Título da fonte: Scientia Medica (Porto Alegre. Online)
Texto Completo: https://revistaseletronicas.pucrs.br/scientiamedica/article/view/1625
Resumo: Objective: To describe 3 cases in which the initial investigation did not confirm the laterality of the seizures, illustrating the false lateralization on scalp EEG on TLE/HS. Commentaries: Since the discharges of the HS are originated from the deep brain, it would spread to the contralateral side before get surface. However, the long-term stimulation of the contralateral lobe would cause lesion on this side, and seizures are triggered independently (secondary epileptogenesis). In this case, the surgery approach is not indicated. The invasive investigation, by subdural strips and video-EEG monitoring, in cases of discordance of scalp EEG and MRI, are better for the surgery indication for TLE/HS, once the operatory results in case of bilateral focus could be catastrophic. KEY WORDS: FALSE LATERALIZATION/scalp EEG; TEMPORAL LOBE EPILEPSY/hippocampal sclerosis.
id PUC_RS-25_2067f5dd958955c4f7f3f9ad604e077a
oai_identifier_str oai:ojs.revistaseletronicas.pucrs.br:article/1625
network_acronym_str PUC_RS-25
network_name_str Scientia Medica (Porto Alegre. Online)
repository_id_str
spelling False lateralization on scalp EEG on mesial temporal epilepsy due to hippocampal sclerosis – cases report [Abstract in English]Falsa lateralização no EEG de escalpo na epilepsia mesial temporal por esclerose hipocampal – relato de casosObjective: To describe 3 cases in which the initial investigation did not confirm the laterality of the seizures, illustrating the false lateralization on scalp EEG on TLE/HS. Commentaries: Since the discharges of the HS are originated from the deep brain, it would spread to the contralateral side before get surface. However, the long-term stimulation of the contralateral lobe would cause lesion on this side, and seizures are triggered independently (secondary epileptogenesis). In this case, the surgery approach is not indicated. The invasive investigation, by subdural strips and video-EEG monitoring, in cases of discordance of scalp EEG and MRI, are better for the surgery indication for TLE/HS, once the operatory results in case of bilateral focus could be catastrophic. KEY WORDS: FALSE LATERALIZATION/scalp EEG; TEMPORAL LOBE EPILEPSY/hippocampal sclerosis.Introdução: A epilepsia do lobo temporal Mesial (ELMT) associada à esclerose hipocampal (EH) necessita muitas vezes de tratamento cirúrgico. Para tanto, é necessário identificar um foco unilateral das crises. Na maioria das vezes, a EH visualizada à RNM se correlaciona com a origem das descargas ao EEG de escalpo. Porém, em uma minoria, o registro de descargas contralaterais ao lado da EH deixa dúvida quanto ao foco epileptogênico, cabendo aí uma investigação eletrofisiológica invasiva, mais fidedigna. Objetivo: Relatar três casos em que a investigação inicial não confirmou a lateralidade das crises, ilustrando a falsa lateralização no EEG de escalpo na ELMT/EH. Discussão: Como as descargas da EH provêm de regiões profundas do cérebro, estas poderiam se propagar para o lado contralateral antes de atingir a superfície. Por outro lado, é possível que o estímulo a longo prazo do lobo contralateral possa se transformar em uma área independente de crises (epileptogênese secundária), o que contra-indicaria a cirurgia. A investigação invasiva dos pacientes com discordância dos estudos de imagem e neurofisiológico inicial traz maior segurança na indicação operatória da ELMT/EH, uma vez que a cirurgia nos casos de foco bilateral poderia ter resultados catastróficos. DESCRITORES: LATERALIDADE; ELETROENCEFALOGRAFIA; EPILEPSIA DO LOBO TEMPORAL; HIPOCAMPO; RELATOS DE CASOS [TIPO DE PUBLICAÇÃO]. ABSTRACT Introduction: The temporal lobe epilepsy (TLE) due to hippocampal sclerosis (HS) frequently needs surgery approach. For this treatment, it is necessary to identify a unilateral focus of seizures. The HS visualized by MRI usually correlates with the discharge onset on scalp EEG. However, in a few patients, contralateral discharges are registered, not correlating with the image exam. In these cases, the epileptic focus remains not clear, and an invasive eletrophysiologic study is indicated. Editora da PUCRS - ediPUCRS2007-03-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionRelato de caso raro ou de especial interesseapplication/pdfapplication/pdfhttps://revistaseletronicas.pucrs.br/scientiamedica/article/view/1625Scientia Medica; Vol. 16 No. 2 (2006)Scientia Medica; v. 16 n. 2 (2006)1980-61081806-5562reponame:Scientia Medica (Porto Alegre. Online)instname:Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS)instacron:PUC_RSporenghttps://revistaseletronicas.pucrs.br/scientiamedica/article/view/1625/1199https://revistaseletronicas.pucrs.br/scientiamedica/article/view/1625/7911Paglioli Neto, EliseuWainberg, RicardoFreitas, Otávioinfo:eu-repo/semantics/openAccess2012-06-25T14:54:13Zoai:ojs.revistaseletronicas.pucrs.br:article/1625Revistahttps://revistaseletronicas.pucrs.br/scientiamedica/PUBhttps://revistaseletronicas.pucrs.br/scientiamedica/oaiscientiamedica@pucrs.br || editora.periodicos@pucrs.br1980-61081806-5562opendoar:2012-06-25T14:54:13Scientia Medica (Porto Alegre. Online) - Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS)false
dc.title.none.fl_str_mv False lateralization on scalp EEG on mesial temporal epilepsy due to hippocampal sclerosis – cases report [Abstract in English]
Falsa lateralização no EEG de escalpo na epilepsia mesial temporal por esclerose hipocampal – relato de casos
title False lateralization on scalp EEG on mesial temporal epilepsy due to hippocampal sclerosis – cases report [Abstract in English]
spellingShingle False lateralization on scalp EEG on mesial temporal epilepsy due to hippocampal sclerosis – cases report [Abstract in English]
Paglioli Neto, Eliseu
title_short False lateralization on scalp EEG on mesial temporal epilepsy due to hippocampal sclerosis – cases report [Abstract in English]
title_full False lateralization on scalp EEG on mesial temporal epilepsy due to hippocampal sclerosis – cases report [Abstract in English]
title_fullStr False lateralization on scalp EEG on mesial temporal epilepsy due to hippocampal sclerosis – cases report [Abstract in English]
title_full_unstemmed False lateralization on scalp EEG on mesial temporal epilepsy due to hippocampal sclerosis – cases report [Abstract in English]
title_sort False lateralization on scalp EEG on mesial temporal epilepsy due to hippocampal sclerosis – cases report [Abstract in English]
author Paglioli Neto, Eliseu
author_facet Paglioli Neto, Eliseu
Wainberg, Ricardo
Freitas, Otávio
author_role author
author2 Wainberg, Ricardo
Freitas, Otávio
author2_role author
author
dc.contributor.author.fl_str_mv Paglioli Neto, Eliseu
Wainberg, Ricardo
Freitas, Otávio
description Objective: To describe 3 cases in which the initial investigation did not confirm the laterality of the seizures, illustrating the false lateralization on scalp EEG on TLE/HS. Commentaries: Since the discharges of the HS are originated from the deep brain, it would spread to the contralateral side before get surface. However, the long-term stimulation of the contralateral lobe would cause lesion on this side, and seizures are triggered independently (secondary epileptogenesis). In this case, the surgery approach is not indicated. The invasive investigation, by subdural strips and video-EEG monitoring, in cases of discordance of scalp EEG and MRI, are better for the surgery indication for TLE/HS, once the operatory results in case of bilateral focus could be catastrophic. KEY WORDS: FALSE LATERALIZATION/scalp EEG; TEMPORAL LOBE EPILEPSY/hippocampal sclerosis.
publishDate 2007
dc.date.none.fl_str_mv 2007-03-16
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Relato de caso raro ou de especial interesse
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://revistaseletronicas.pucrs.br/scientiamedica/article/view/1625
url https://revistaseletronicas.pucrs.br/scientiamedica/article/view/1625
dc.language.iso.fl_str_mv por
eng
language por
eng
dc.relation.none.fl_str_mv https://revistaseletronicas.pucrs.br/scientiamedica/article/view/1625/1199
https://revistaseletronicas.pucrs.br/scientiamedica/article/view/1625/7911
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Editora da PUCRS - ediPUCRS
publisher.none.fl_str_mv Editora da PUCRS - ediPUCRS
dc.source.none.fl_str_mv Scientia Medica; Vol. 16 No. 2 (2006)
Scientia Medica; v. 16 n. 2 (2006)
1980-6108
1806-5562
reponame:Scientia Medica (Porto Alegre. Online)
instname:Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS)
instacron:PUC_RS
instname_str Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS)
instacron_str PUC_RS
institution PUC_RS
reponame_str Scientia Medica (Porto Alegre. Online)
collection Scientia Medica (Porto Alegre. Online)
repository.name.fl_str_mv Scientia Medica (Porto Alegre. Online) - Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS)
repository.mail.fl_str_mv scientiamedica@pucrs.br || editora.periodicos@pucrs.br
_version_ 1809101748457963520

Registros relacionados