Angular hypertrophied epiphysis of the thumb distal phalanx in radial polydactyly.

Kim, Jae Kwang; Shin, Young Ho; Lee, Wonsun · J Hand Surg Eur Vol · 2025

case_series · Level IV

Where this comes from

Abstract

In a series of 271 consecutive duplicated thumbs, an angular, hypertrophied epiphysis was detected in 13 thumbs. We propose a revised version of the radial polydactyly classification that includes this pattern as a separate type from triphalangeal thumb.

Medical subject headings

Anatomy