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Radial Polydactyly

Nathan Khabyeh-Hasbani1, Declan Tozzi1, Sara M Guerra2

  • 1SUNY Downstate Medical Center, Brooklyn, New York.

JBJS Reviews
|August 6, 2023
PubMed

Insights

Radial polydactyly, a common congenital hand anomaly, requires early surgical intervention. This condition arises from embryonic misregulation of sonic hedgehog protein, necessitating treatment before fine motor skill development.

Area of Science:

  • Pediatric Surgery
  • Developmental Biology
  • Orthopedics

Background:

  • Radial polydactyly is a frequent congenital hand anomaly, affecting 0.08-1.40 per 1,000 live births.
  • Embryogenesis of polydactyly occurs between weeks 5-8, linked to sonic hedgehog protein misregulation in limb bud development.
  • Existing classification systems, like Flatt's, have limitations in categorizing preaxial polydactyly.

Purpose of the Study:

  • To highlight the incidence and embryonic origins of radial polydactyly.
  • To discuss the limitations of current classification systems for preaxial polydactyly.
  • To emphasize the importance of early surgical intervention for optimal functional and aesthetic outcomes.

Main Methods:

  • Review of embryological development of the hand.
  • Analysis of congenital anomaly incidence data.
  • Discussion of surgical timing and classification systems.

Main Results:

  • Radial polydactyly is a common birth defect with specific developmental timing.
  • Current classification methods for preaxial polydactyly present challenges.
  • Early surgical correction (1-2 years) is crucial for hand function.

Conclusions:

  • Early surgical treatment of radial polydactyly is essential for improved function and appearance.
  • Understanding the embryological basis aids in managing this condition.
  • Further refinement of classification systems may be beneficial.

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