Infantile epilepsy associated with mosaic 2q24 duplication including SCN2A and SCN3A

Marilena Vecchi, Matteo Cassina, Alberto Casarin, Chiara Rigon, Paola Drigo, Luca De Palma, Maurizio Clementi

Research output: Contribution to journalArticle

Abstract

Epilepsies can be caused by specific genetic anomalies or by non-genetic factors, but in many cases the underlying cause is unknown. Mutations in the SCN1A and SCN2A genes are reported in childhood epilepsies; in particular SCN1A was found mutated in patients with Dravet syndrome and with generalized epilepsy with febrile seizures plus (GEFS+). In this paper we report a patient presenting with an atypical epileptic syndrome whose phenotype partially overlaps both Dravet syndrome and benign familial neonatal-infantile seizures (BFNIS). Array-CGH analysis suggested the presence of a mosaic duplication (about 12 Mb) at the level of chromosome 2q23.3q24.3 involving SCN2A and SCN3A genes. Additional analyses (radiolabeled RFLP and quantitative PCR) confirmed the mosaicism of the duplication. We suggest that the array-CGH analysis is mandatory for children presenting with epilepsy and psycho-motor retardation even without dysmorphisms or other clinical features suggesting a specific genetic/epileptic syndrome. The analysis must nevertheless be performed taking into account the possibility of a mosaicism.

Original languageEnglish
Pages (from-to)813-816
Number of pages4
JournalSeizure
Volume20
Issue number10
DOIs
Publication statusPublished - Dec 2011

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Keywords

  • Array-CGH
  • BFNIS
  • Dravet syndrome
  • Genetics

ASJC Scopus subject areas

  • Clinical Neurology
  • Neurology

Cite this

Vecchi, M., Cassina, M., Casarin, A., Rigon, C., Drigo, P., De Palma, L., & Clementi, M. (2011). Infantile epilepsy associated with mosaic 2q24 duplication including SCN2A and SCN3A. Seizure, 20(10), 813-816. https://doi.org/10.1016/j.seizure.2011.07.008