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Acromelic frontonasal dysplasia

Disease definition

A rare frontonasal dysplasia characterized by distinct craniofacial (large fontanelle, hypertelorism, bifid nasal tip, nasal clefting, brachycephaly, median cleft face, carp-shaped mouth), brain (interhemispheric lipoma, agenesis of the corpus callosum), and limb (tibial hypoplasia/aplasia, club foot, symmetric preaxial polydactyly of the feet and bilateral clubbed and thickened nails of halluces) malformations as well as intellectual disability. Other manifestations sometimes reported include absent olfactory bulbs, hypopituitarism and cryptorchidism.


Classification level: Disorder
  • Synonym(s):
    • AFND
    • Acromelic frontonasal dysostosis
    • Toriello syndrome
  • Prevalence: <1 / 1 000 000
  • Inheritance: Autosomal dominant 
  • Age of onset: Antenatal, Neonatal
  • ICD-10: Q75.8
  • ICD-11: LD25.3
  • OMIM: 603671
  • UMLS: C0796182
  • MeSH: C535657
  • GARD: 5539
  • MedDRA: -
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