Triphalangeal thumb

Triphalangeal thumb is considered a form of pre-axial polydactyly.

Epidemiology

Triphalangeal thumbs have an incidence of 1 in 25,000 7

Pathology

A triphalangeal thumb, as the name implies, has three phalanges instead of the usual two. There is an autosomal dominant genetic transmission 8

Associations

There is a long list of associations 1-6

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Article information

rID: 10617
Section: Gamuts
Synonyms or Alternate Spellings:
  • Tri-phalangeal thumb
  • Tri-phalangeal thumbs
  • Triphalangeal thumbs

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Cases and figures

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