Variable epilepsy phenotypes associated with a familial intragenic deletion of the SCN1A gene.

Abstract excerpt

Deletions and duplications/amplifications of the α1-sodium channel subunit (SCN1A) gene occur in about 12% of patients with Dravet syndrome (DS) who are otherwise mutation-negative. Such genomic abnormalities cause loss of function, with severe phenotypes, reproductive disadvantage and, therefore, sporadic occurrence. Inherited mutations, occurring in ∼5% of patients with DS, are usually missense; transmission...

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