An Infant With Epilepsy and Recurrent Hemiplegia due to Compound Heterozygous Variants in ATP1A2.

Wilbur, Colin; Bürki, Sarah Elisabeth; Guella, Ilaria; Toyota, Eric B; Evans, Daniel M; McKenzie, Marna B; Datta, Anita; Michoulas, Aspasia; Adam, Shelin; Van Allen, Margot I; Nelson, Tanya N; Farrer, Matthew J; Connolly, Mary B; Demos, Michelle (2017). An Infant With Epilepsy and Recurrent Hemiplegia due to Compound Heterozygous Variants in ATP1A2. Pediatric neurology, 75, pp. 87-90. Elsevier 10.1016/j.pediatrneurol.2017.06.003

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BACKGROUND Pathogenic heterozygous variants in the ATP1A2 gene have most commonly been associated with familial hemiplegic migraine. However, a wide spectrum of phenotypes that include alternating hemiplegia of childhood and epilepsy have been described. PATIENT DESCRIPTION We describe a boy who presented at age three months with a complex phenotype that included epilepsy, nonepileptic paroxysmal events, and recurrent hemiplegia. Magnetic resonance imaging demonstrated unilateral cortical edema during a severe episode of hemiplegia that was followed by a persistent mild hemiparesis. RESULTS Whole-exome sequencing identified a previously reported ATP1A2 missense variant (p.Arg548Cys) classified as pathogenic and a novel missense variant (p.Arg1008Trp) classified as a variant of uncertain significance. After this genetic diagnosis, treatment with flunarizine was initiated and no further episodes of hemiplegia have occurred. CONCLUSIONS This is only the second report of compound heterozygosity of the ATP1A2 gene. It demonstrates the spectrum of paroxysmal neurological events that can arise as a result of ATP1A2 variants, with unique features overlapping alternating hemiplegia of childhood, hemiplegic migraine, and epilepsy. This child illustrates the diagnostic challenges that these disorders can present and the importance of genetic diagnosis in guiding management.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Gynaecology, Paediatrics and Endocrinology (DFKE) > Clinic of Paediatric Medicine > Neuropaediatrics

UniBE Contributor:

Bürki, Sarah Elisabeth

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0887-8994

Publisher:

Elsevier

Language:

English

Submitter:

Sinthuja Rajkumar

Date Deposited:

26 Mar 2018 10:05

Last Modified:

26 Mar 2018 10:13

Publisher DOI:

10.1016/j.pediatrneurol.2017.06.003

PubMed ID:

28811059

Uncontrolled Keywords:

ATP1A2 alternating hemiplegia epilepsy familial hemiplegic migraine

BORIS DOI:

10.7892/boris.111158

URI:

https://boris.unibe.ch/id/eprint/111158

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