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Title: Thenar Dysplasia in Radial Polydactyly Depends on the Level of Bifurcation
Authors: Saito, Susumu  kyouindb  KAKEN_id
Ueda, Maho
Murata, Mai
Suzuki, Shigehiko
Author's alias: 齊藤, 晋
上田, 真帆
鈴木, 茂彦
Issue Date: 1-Jan-2018
Publisher: Wolters Kluwer Health
Journal title: Plastic and Reconstructive Surgery
Volume: 141
Issue: 1
Start page: 85e
End page: 90e
Abstract: Background: Little is known about thenar dysplasia in radial polydactyly, other than that thenar hypoplasia occasionally occurs in radial polydactyly with triphalangism. In particular, the phenotype and level of duplication associated with thenar dysplasia remain unclear. Methods: The abductor pollicis brevis and flexor pollicis brevis muscles were visualized using three-dimensional ultrasound, and their horizontal geometry was assessed using a biaxial level classification system. Subjects were categorized into three phenotypes according to the developmental condition of the radial thumb. The relationship between the level of distribution of the muscles and the level of the bifurcation of the radial thumb was investigated. Results: Nineteen patients with radial polydactyly without triphalangism were included. There were 10 patients with the nonfloating type, three with the floating type, and six with the rudimentary type. All patients with bifurcation at or more distal to the metacarpophalangeal joint had normal thenar muscle distribution, but the muscles in patients with bifurcation at or more proximal to the level of the metacarpals were confined, regardless of phenotype. The level of muscle distribution was strongly correlated with the level of the bifurcation of the radial thumb. Conclusions: These findings suggest that formation of the thenar muscles in the longitudinal direction in radial polydactyly might depend on the level of bifurcation of the radial thumb. The presence of thenar dysplasia even in floating-type or rudimentary-type duplications is of clinical and etiologic importance.
Description: 赤ちゃんの多指症、筋肉の発達は規則的. 京都大学プレスリリース. 2018-01-04.
Rights: This is a non-final version of an article published in final form in (provide complete journal citation)
The full-text file will be made open to the public on 01 January 2019 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
This is not the published version. Please cite only the published version.
URI: http://hdl.handle.net/2433/228917
DOI(Published Version): 10.1097/PRS.0000000000003937
PubMed ID: 29280874
Related Link: https://www.kyoto-u.ac.jp/ja/research-news/2018-01-04-0
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