Orphanet: X linked intellectual disability, Hedera type
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X-linked intellectual disability, Hedera type

Disease definition

X-linked intellectual disability, Hedera type is a rare X-linked intellectual disability syndrome characterized by an onset in infancy of delayed motor and speech milestones, generalized tonic-clonic seizures and drop attacks, and mild to moderate intellectual disability. Additional, less common manifestations include scoliosis, ataxia (resulting in progressive gait disturbance), and bilateral pes planovalgus. Physical appearance is normal with no dysmorphic features reported.

ORPHA:93952

Classification level: Disorder
  • Synonym(s):
    • MRXSH
  • Prevalence: <1 / 1 000 000
  • Inheritance: X-linked recessive 
  • Age of onset: Infancy
  • ICD-10: -
  • OMIM: 300423
  • UMLS: -
  • MeSH: -
  • GARD: -
  • MedDRA: -

  A summary on this disease is available in Deutsch (2017) Español (2017) Français (2017) Italiano (2017) Nederlands (2017)

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Further information on this disease

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