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

Share Article

Article Information

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

Support Radiopaedia and see fewer ads

  • Drag
    Case 1
    Drag here to reorder.
  • Drag
    Case 2
    Drag here to reorder.
  • Updating… Please wait.
    Loadinganimation

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.