Title
Ring chromosome 20 syndrome : electroclinical description of six patients and review of the literature Ring chromosome 20 syndrome : electroclinical description of six patients and review of the literature
Author
Faculty/Department
Faculty of Medicine and Health Sciences
Publication type
article
Publication
Subject
Psychology
Biology
Human medicine
Source (journal)
Epilepsy and behavior
Volume/pages
23(2012) :4 , p. 409-414
ISSN
1525-5050
ISI
000302288200003
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Background: Ring chromosome 20 syndrome is a rare chromosomal disorder. Methods: In six patients, we focused on the presenting epileptic phenotype, the behavioral and mental problems and the relationship between the ratio of mosaicism and the age at onset of the epilepsy. Results: All patients presented with pharmacoresistant frontal lobe complex partial seizures. The earliest onset of epilepsy was seen in patients without mosaicism. There were three patients out of six with behavioral disturbances before the onset of seizures. All patients had mild to moderate cognitive impairment. Electroencephalogram recordings showed rhythmic theta waves with frontal predominance and non-convulsive status epilepticus (NCSE). Conclusions: The ring chromosome 20 syndrome is characterized by childhood-onset refractory epilepsy continuing throughout adult life, mental disability, and behavioral disturbances which can originate before seizure onset. Ictal EEG reveals a unique pattern. Our findings indicate a possible link between the percentage of affected cells and the age of epilepsy onset. (C) 2012 Elsevier Inc. All rights reserved.
E-info
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