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Polydactyly of an index finger

Disease definition

Polydactyly of an index finger or PPD3 is a form of preaxial polydactyly of fingers (see this term), a limb malformation syndrome, where the thumb is replaced by one or two triphalangeal digits with dermatoglyphic pattern specific of the index finger. Two forms of PPD3 have been characterized: unilateral and bilateral (see these terms). There have been no further descriptions in the literature since 1962.


Classification level: Disorder
  • Synonym(s):
    • PPD3
    • Preaxial polydactyly type 3
  • Prevalence: <1 / 1 000 000
  • Inheritance: Autosomal dominant 
  • Age of onset: Infancy, Neonatal
  • ICD-10: Q69.0
  • OMIM: 174600
  • UMLS: C1868113
  • MeSH: -
  • GARD: 2256
  • MedDRA: -
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