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Progressive myoclonic epilepsy type 7

Disease definition

A rare, genetic, neurological disorder characterized by childhood to adolescent onset of progressive myoclonus (which becomes very severe and results in major motor impediment) associated with infrequent tonic-clonic seizures, and, occasionally, ataxia. Learning disability prior to seizure onset and mild cognitive decline may be associated.


Classification level: Disorder
  • Synonym(s):
    • EPM7
    • MEAK
    • Myoclonus epilepsy and ataxia due to potassium channel mutation
    • PME type 7
    • Progressive myoclonic epilepsy due to KV3.1 deficiency
    • Progressive myoclonus epilepsy type 7
  • Prevalence: <1 / 1 000 000
  • Inheritance: Autosomal dominant 
  • Age of onset: Childhood
  • ICD-10: G40.3
  • OMIM: 616187
  • UMLS: -
  • MeSH: -
  • GARD: -
  • MedDRA: -
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