Ring chromosome 20 and epilepsy: a recognizable syndrome (two new cases)

Ring chromosome 20 (RC20) is a rare chromosomopathy caracterized by slight mental deficiency, behavioral disorders and epilepsy. We report two cases o f ring chromosome 20, who exibited non convulsive: status epilepticus lasti ng minutes to hours, often triggered by emotional events, with associated t ypical electroencephalographic features. Our report-highlights the features of the electroclinical epilepsy syndrome associated with RC20, which repre sents a distinct and recognizable entity. The genetic basis of this disorde r is discussed.