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Updated: Feb 3, 2026
12:02
Molecular Evolution of the Tre Recombinase
Published on: May 29, 2008
10.1K
Radial polydactyly: putting together evolution, development and clinical anatomy.
Bríd Crowley1, Susan Stevenson1, Rui Diogo2
11 Department of Plastic and Reconstructive Surgery, Royal Victoria Infirmary, The Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK.
The Journal of Hand Surgery, European Volume
|November 1, 2018
Summary
Evolutionary developmental pathology reveals complex anatomy in radial polydactyly. Muscle and bone correlations in the hand are predictable, but forearm variations challenge current limb development models.
Area of Science:
- Evolutionary developmental pathology
- Developmental biology
- Human anatomy
Background:
- Radial polydactyly is a congenital condition characterized by extra digits on the radial (thumb) side of the hand.
- Previous research on radial polydactyly primarily focused on skeletal anomalies, with less attention to soft tissue variations.
- Understanding the interplay between skeletal and soft tissue development is crucial for evolutionary developmental pathology.
Purpose of the Study:
- To investigate the spatial correlation between muscles, tendons, and bones in radial polydactyly.
- To determine if observed anatomical patterns in radial polydactyly support existing models of limb development (modularity and topology).
- To assess the predictability of operative findings based on skeletal duplication in radial polydactyly.
Main Methods:
- Analysis of anatomical and operative records from 54 consecutive cases of radial polydactyly.
- Examination of the predictability of muscle and tendon insertion sites in relation to skeletal structures.
- Evaluation of findings within the framework of the modularity and topology models of limb development.
Main Results:
- Tendons and muscles in the autopod (hand) demonstrated more predictable insertion sites, aligning with both modularity and topology models.
- Tendons in the zeugopod (forearm) exhibited less predictable anatomical arrangements.
- Neither the modularity nor the topology model could universally predict the complex anatomy observed in radial polydactyly.
Conclusions:
- The anatomy in radial polydactyly is complex, with significant variations in both skeletal and soft tissue structures.
- Predicting surgical outcomes based solely on the degree of skeletal duplication is challenging due to inconsistent soft tissue anatomy.
- These findings highlight the intricate developmental processes underlying limb malformations and the need for refined developmental models.
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