{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,15]],"date-time":"2026-07-15T03:31:14Z","timestamp":1784086274849,"version":"3.55.0"},"reference-count":15,"publisher":"FapUNIFESP (SciELO)","issue":"3A","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Arq. Neuro-Psiquiatr."],"published-print":{"date-parts":[[2002,9]]},"abstract":"<jats:p>We present the clinical, electroencephalographic, neuroimaging (brain magnetic resonance image - MRI and spectroscopy by MRI) and cytogenetic findings of a young male patient with a rare cytogenetic anomaly characterised by a de novo 46,XY,r(20)(p13q13.3) karyotype. He presents with mental retardation, emotional liability, and strabismus, without any other significant dysmorphies. There are brain anomalies characterised by corpus callosum, uvula, nodule and cerebellum pyramid hypoplasias, besides arachnoid cysts in the occipital region. He had seizures refractory to pharmacotherapy and long period of confusional status with or without a motor component. The authors recognised that the EEG pattern was not fixed but changed over time, specially for bursts of slow waves with great amplitude accompanied or not by sharp components, and bursts of theta waves sharply contoured. Previously, epilepsy solely has been assigned to region 20q13. However, the important structural cerebral alterations present in our case has not been reported associated to such chromosomal abnormality and may indicate possible new chromosomal sites where such atypical neurological characteristics could be mapped.<\/jats:p>","DOI":"10.1590\/s0004-282x2002000400022","type":"journal-article","created":{"date-parts":[[2005,4,15]],"date-time":"2005-04-15T10:32:51Z","timestamp":1113561171000},"page":"631-635","source":"Crossref","is-referenced-by-count":11,"title":["Epilepsy and ring chromosome 20: case report"],"prefix":"10.1590","volume":"60","author":[{"given":"Marleide da Mota","family":"Gomes","sequence":"first","affiliation":[{"name":"Instituto de Neurologia Deolindo Couto; Universidade Federal do Rio de Janeiro"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Irene","family":"Lucca","sequence":"additional","affiliation":[{"name":"Instituto de Neurologia Deolindo Couto"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sonia Alonso Monteiro","family":"Bezerra","sequence":"additional","affiliation":[{"name":"Instituto de Neurologia Deolindo Couto"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juan","family":"Llerena Jr","sequence":"additional","affiliation":[{"name":"FIOCRUZ; Universidade Federal do Rio de Janeiro,  Brasil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Denise Madeira","family":"Moreira","sequence":"additional","affiliation":[{"name":"Instituto de Neurologia Deolindo Couto; Universidade Federal do Rio de Janeiro"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"530","reference":[{"key":"ref1","first-page":"285","article-title":"A case of ring 20 chromosome with cardiac and renal anomalies","volume":"21","author":"Burnell RH","year":"1985","journal-title":"Aust Paediatr J","ISSN":"https:\/\/id.crossref.org\/issn\/0004-993X","issn-type":"print"},{"key":"ref2","doi-asserted-by":"crossref","first-page":"375","DOI":"10.1136\/jmg.24.6.375","article-title":"Ring 20 chromosome phenotype","volume":"24","author":"Porfirio B","year":"1987","journal-title":"J Med Genet,"},{"key":"ref3","doi-asserted-by":"crossref","first-page":"70","DOI":"10.1111\/j.1469-8749.1994.tb11768.x","article-title":"Ring chromosome 20 moisacism in a girl with complex partial seizures","volume":"36","author":"Holopainen I","year":"1994","journal-title":"Dev Med Child Neurol","ISSN":"https:\/\/id.crossref.org\/issn\/0012-1622","issn-type":"print"},{"key":"ref4","first-page":"939","article-title":"Ring chromosome 20 and nonconvulsive status epilepticus","volume":"120","author":"Inoue Y","year":"1997","journal-title":"A new epileptic syndrome. 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