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W syndrome

Disease definition

A rare multiple congenital anomalies/dysmorphic syndrome characterized by moderate to severe intellectual disability, neurologic signs and symptoms (such as seizures, spasticity, strabismus), characteristic dysmorphic facial features (including broad forehead, hypertelorism, downslanting palpebral fissures, broad and flat nasal bridge, midline notch of upper lip, lack of upper central incisors, incomplete oral cleft, and prominent mandible), and acne scars. Hearing impairment, pseudo-bulbar palsy, growth retardation, and skeletal anomalies (camptodactyly, clinodactyly, bilateral cubitus valgus, pes cavus/planus) have also been described.


Classification level: Disorder
  • Synonym(s):
    • Pallister-W syndrome
  • Prevalence: <1 / 1 000 000
  • Inheritance: X-linked recessive 
  • Age of onset: Infancy, Neonatal
  • ICD-10: Q87.8
  • OMIM: 311450
  • UMLS: C0796110
  • MeSH: -
  • GARD: 358
  • MedDRA: -
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