{"title":"New Classification System for Radially Deviated Thumb Polydactyly.","authors":"Kaiying Shen, Yuezhou Wang, Yufeng Wang, Yabin Hu, Yunlan Xu","doi":"10.1016/j.jhsa.2025.02.024","DOIUrl":null,"url":null,"abstract":"<p><strong>Purpose: </strong>Radially deviated thumb polydactyly (RDTP) is a risk factor for secondary deformities but lacks comprehensive characterization. We developed a new classification system for RDTP based on the preoperative radiographic appearance that should inform surgical approaches: (1) D-shaped, (2) bell-shaped, (3) radial-concave phalanges, and (4) asymmetric Wassel III-like.</p><p><strong>Methods: </strong>Radially deviated thumb polydactyly patients evaluated from January 2015 to December 2021 were classified into four types based on their preoperative radiographs. Reliability of the classification was assessed, and patient demographics, radiographic measurements, and intraoperative findings were retrospectively reviewed.</p><p><strong>Results: </strong>Twenty-nine patients with RDTP (29 affected thumbs) were included and classified as follows: type I (n = 9), type II (n = 10), type III (n = 8), and type IV (n = 2). The interobserver and intraobserver kappa values for the classification system were 0.928 and 0.963, respectively.</p><p><strong>Conclusions: </strong>Our proposed RDTP classification system is reliable and may offer surgical guidance for the treatment of patients with RDTP.</p><p><strong>Type of study/level of evidence: </strong>Prognostic IV.</p>","PeriodicalId":54815,"journal":{"name":"Journal of Hand Surgery-American Volume","volume":" ","pages":""},"PeriodicalIF":2.1000,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Hand Surgery-American Volume","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1016/j.jhsa.2025.02.024","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ORTHOPEDICS","Score":null,"Total":0}
引用次数: 0
Abstract
Purpose: Radially deviated thumb polydactyly (RDTP) is a risk factor for secondary deformities but lacks comprehensive characterization. We developed a new classification system for RDTP based on the preoperative radiographic appearance that should inform surgical approaches: (1) D-shaped, (2) bell-shaped, (3) radial-concave phalanges, and (4) asymmetric Wassel III-like.
Methods: Radially deviated thumb polydactyly patients evaluated from January 2015 to December 2021 were classified into four types based on their preoperative radiographs. Reliability of the classification was assessed, and patient demographics, radiographic measurements, and intraoperative findings were retrospectively reviewed.
Results: Twenty-nine patients with RDTP (29 affected thumbs) were included and classified as follows: type I (n = 9), type II (n = 10), type III (n = 8), and type IV (n = 2). The interobserver and intraobserver kappa values for the classification system were 0.928 and 0.963, respectively.
Conclusions: Our proposed RDTP classification system is reliable and may offer surgical guidance for the treatment of patients with RDTP.
期刊介绍：
The Journal of Hand Surgery publishes original, peer-reviewed articles related to the pathophysiology, diagnosis, and treatment of diseases and conditions of the upper extremity; these include both clinical and basic science studies, along with case reports. Special features include Review Articles (including Current Concepts and The Hand Surgery Landscape), Reviews of Books and Media, and Letters to the Editor.
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