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Syndactyly type 8

Disease definition

A rare non-syndromic syndactyly characterized by unilateral or bilateral fusion of the 4th and 5th metacarpals with no other associated abnormalities. Patients present shortened 4th and 5th metacarpals with excessive separation between their distal ends, resulting in marked ulnar deviation of the little finger and an inability to bring the 5th finger in parallel with the other fingers.

ORPHA:2498

Classification level: Disorder
  • Synonym(s):
    • Fusion of metacarpals 4 and 5
  • Prevalence: -
  • Inheritance: Autosomal dominant or X-linked recessive 
  • Age of onset: -
  • ICD-10: Q70.0
  • OMIM: 309630
  • UMLS: C1839728
  • MeSH: -
  • GARD: 3559
  • MedDRA: -
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