Thumb duplication classifications: Is there still a need for improvement?
Ayşe Şencan1
, Mehmet Baydar2, Kahraman Öztürk1, Ethem Ayhan Ünkar1, Ersin Demirkaynak3, Hanifi Üçpunar3
1Department of Hand Surgery, University of Health Sciences, Metin Sabancı Baltalimanı Bone Diseases Training and Research Hospital, Istanbul, Turkey
2Department of Orthopedics and Traumatology, Division of Hand Surgery, University of Health Sciences, Adana City Training and Research Hospital, Adana, Turkey
3Department of Orthopedics and Traumatology, University of Health Sciences, Metin Sabancı Baltalimanı Bone Diseases Training and Research Hospital, Istanbul, Turkey
Keywords: Classification, hand deformities, thumb, polydactyly.
Abstract
Objectives: This study aims to compare the usefulness of two systems in classifying thumb duplication cases and give some examples of the cases we believe that are unclassifiable.
Patients and methods: Between January 2011 and January 2018, a total of 50 patients (29 males, 21 females; median age: 46.4±68.3 months; range, 1 to 318 months) with thumb duplications as assessed according to the Wassel and Rotterdam classification systems were included.
Results: Duplication was present in the right hand in 28, in the left hand in 21, and in both hands in one patient. According to the Wassel classification system, 45 patients could be allocated in any of the types; however, five patients could not be classified. According to the Rotterdam classification, 47 cases fell into one of the classifications; however, three cases could not be classified.
Conclusion: Despite efforts to find the best classification system for thumb duplications, the proposed systems may not fully cover the presented radial polydactyly cases, and additions to the system are required.
Citation: Şencan A, Baydar M, Öztürk K, Ünkar EA, Demirkaynak E, Üçpunar H. Thumb duplication classifications: Is there still a need for improvement?. Jt Dis Relat Surg 2022;33(1):156-161.
The authors declared no conflicts of interest with respect to the authorship and/or publication of this article.
The authors received no financial support for the research and/or authorship of this article.