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Skeletal dysplasia-T-cell immunodeficiency-developmental delay syndrome

Disease definition

A rare genetic multiple congenital anomalies/dysmorphic syndrome characterized by the association of developmental delay, variable intellectual disability, skeletal dysplasia, and in many cases T-cell immunodeficiency and other immunologic abnormalities. Skeletal findings include short stature, anomalies of the long bones, hands and feet, and pelvis, platyspondyly, cervical malformation, and pectus excavatum. Dysmorphic facial features, such as coarse face, hypertelorism, and broad nasal tip, may be present. Additional reported manifestations are seizures, hyperreflexia, nystagmus, and muscular hypotonia, as well as multiple liver cysts.


Classification level: Disorder
  • Synonym(s):
    • EXTL3-related neuro-immuno-skeletal dysplasia syndrome
    • Neuro-immuno-skeletal dysplasia syndrome due to EXTL3 deficiency
  • Prevalence: <1 / 1 000 000
  • Inheritance: -
  • Age of onset: Antenatal, Neonatal
  • ICD-10: Q87.8
  • OMIM: 617425
  • UMLS: C5567899
  • MeSH: -
  • GARD: -
  • MedDRA: -

Detailed information


ERN produced/endorsed by ERN(s)   FSMR produced/endorsed by FSMR(s)
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