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Hyperekplexia-epilepsy syndrome

Disease definition

A rare, X-linked, syndromic intellectual disability disease characterized by neonatal hypertonia which evolves to hypotonia and an exaggerated startle response (to sudden visual, auditory or tactile stimuli), followed by the development of early-onset, frequently refractory, tonic or myoclonic seizures. Progressive epileptic encephalopathy, intellectual disability, and psychomotor development arrest, with subsequent decline, may be additionally associated.

ORPHA:163985

Classification level: Disorder
  • Synonym(s): -
  • Prevalence: <1 / 1 000 000
  • Inheritance: X-linked recessive 
  • Age of onset: Neonatal
  • ICD-10: G25.8
  • OMIM: 300607
  • UMLS: C5191643
  • MeSH: -
  • GARD: -
  • MedDRA: -

  A summary on this disease is available in Deutsch (2019) Español (2019) Français (2019) Italiano (2019) Nederlands (2019)

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The documents contained in this web site are presented for information purposes only. The material is in no way intended to replace professional medical care by a qualified specialist and should not be used as a basis for diagnosis or treatment.