Secondary late-onset Lennox-Gastaut syndrome: a critical view
From a group of 66 patients with the Lennox-Gastaut syndrome, 12 whose manifestations had started after the 6th year of life were selected for study. These patients were observed clinically and electroencephalographically for an average period of 2.5 years. We concluded that the late-onset syndrome...
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| Language: | English |
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Thieme Revinter Publicações
1984-06-01
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| Series: | Arquivos de Neuro-Psiquiatria |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X1984000200001&lng=en&tlng=en |
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| author | Amilton Antunes Barreira Michel Pierre Lison |
| author_facet | Amilton Antunes Barreira Michel Pierre Lison |
| author_sort | Amilton Antunes Barreira |
| collection | DOAJ |
| description | From a group of 66 patients with the Lennox-Gastaut syndrome, 12 whose manifestations had started after the 6th year of life were selected for study. These patients were observed clinically and electroencephalographically for an average period of 2.5 years. We concluded that the late-onset syndrome can: occur after a long interval between diffuse encephalopathy and the first clinical manifestations, with or without previous alterations in psychomotor development; be associated from the onset with serious mental retardation; exhibit simple, complex and mixed seizures similar to those observed in the early form. These patients can also: suffer complex and mixed epileptic seizures previously unreported; paroxismal interictal EEG abnormalities that overlap those of the early form; and spike-slow wave complexes in the EEG that can be actived by hyperpnea. Our results demonstrate that the incidence of LGS after 6 years of age does not necessarily imply a lower frequency of organic antecedents, or beter neu-ropsychomotor development up to the onset of the syndrome or the presence of a higher rate of nonspecific seizures (generalized or partial seizures, and mainly those with elaborate symptomatolgy). The critical and encephalographic expression of the syndrome, which is secondary and starts after the 6th year of age, may depend at least in part on the age when diffuse encephalopathy started. |
| format | Article |
| id | doaj-art-858b78025ee844d3bb7c8cdcb254852a |
| institution | OA Journals |
| issn | 1678-4227 |
| language | English |
| publishDate | 1984-06-01 |
| publisher | Thieme Revinter Publicações |
| record_format | Article |
| series | Arquivos de Neuro-Psiquiatria |
| spelling | doaj-art-858b78025ee844d3bb7c8cdcb254852a2025-08-20T01:58:33ZengThieme Revinter PublicaçõesArquivos de Neuro-Psiquiatria1678-42271984-06-014229510410.1590/S0004-282X1984000200001S0004-282X1984000200001Secondary late-onset Lennox-Gastaut syndrome: a critical viewAmilton Antunes Barreira0Michel Pierre Lison1Universidade de São PauloUniversidade de São PauloFrom a group of 66 patients with the Lennox-Gastaut syndrome, 12 whose manifestations had started after the 6th year of life were selected for study. These patients were observed clinically and electroencephalographically for an average period of 2.5 years. We concluded that the late-onset syndrome can: occur after a long interval between diffuse encephalopathy and the first clinical manifestations, with or without previous alterations in psychomotor development; be associated from the onset with serious mental retardation; exhibit simple, complex and mixed seizures similar to those observed in the early form. These patients can also: suffer complex and mixed epileptic seizures previously unreported; paroxismal interictal EEG abnormalities that overlap those of the early form; and spike-slow wave complexes in the EEG that can be actived by hyperpnea. Our results demonstrate that the incidence of LGS after 6 years of age does not necessarily imply a lower frequency of organic antecedents, or beter neu-ropsychomotor development up to the onset of the syndrome or the presence of a higher rate of nonspecific seizures (generalized or partial seizures, and mainly those with elaborate symptomatolgy). The critical and encephalographic expression of the syndrome, which is secondary and starts after the 6th year of age, may depend at least in part on the age when diffuse encephalopathy started.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X1984000200001&lng=en&tlng=en |
| spellingShingle | Amilton Antunes Barreira Michel Pierre Lison Secondary late-onset Lennox-Gastaut syndrome: a critical view Arquivos de Neuro-Psiquiatria |
| title | Secondary late-onset Lennox-Gastaut syndrome: a critical view |
| title_full | Secondary late-onset Lennox-Gastaut syndrome: a critical view |
| title_fullStr | Secondary late-onset Lennox-Gastaut syndrome: a critical view |
| title_full_unstemmed | Secondary late-onset Lennox-Gastaut syndrome: a critical view |
| title_short | Secondary late-onset Lennox-Gastaut syndrome: a critical view |
| title_sort | secondary late onset lennox gastaut syndrome a critical view |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X1984000200001&lng=en&tlng=en |
| work_keys_str_mv | AT amiltonantunesbarreira secondarylateonsetlennoxgastautsyndromeacriticalview AT michelpierrelison secondarylateonsetlennoxgastautsyndromeacriticalview |