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Duplication of the proximal phalanx of hand

MedGen UID:
866990
•Concept ID:
C4021347
•
Anatomical Abnormality
Synonyms: Duplication of the innermost bones of hand; Partial/complete duplication of the proximal phalanges of the hand
 
HPO: HP:0010006

Definition

This term applies if one or more of the proximal phalanges of the hand are either partially duplicated, depending on severity leading to a broad or bifid appearance of the phalanges, or completely duplicated. [from HPO]

Recent clinical studies

Etiology

Modified Wassel-Flatt Type III Radial Polydactyly: Subtypes and Their Outcomes.
Kim JK, Yoon JO, Shin YH, Lee SH
J Hand Surg Am 2024 Jan;49(1):60.e1-60.e8. Epub 2022 Jul 6 doi: 10.1016/j.jhsa.2022.04.024. PMID: 35803781
The anatomy of Wassel type IV-D thumb duplication.
He B, Liu G, Nan G
J Hand Surg Eur Vol 2017 Jun;42(5):516-522. Epub 2017 Feb 14 doi: 10.1177/1753193417691747. PMID: 28196434
A classification system for ulnar polydactyly and clinical series.
Duran A, Ciloglu NS, Buyukdogan H
J Hand Surg Am 2015 May;40(5):914-21. Epub 2015 Feb 21 doi: 10.1016/j.jhsa.2014.12.030. PMID: 25707550
Arthrography in thumb polydactyly with bifurcation at the interphalangeal or metacarpophalangeal joints provides practical information at surgery.
Iba K, Wada T, Kanaya K, Oki G, Yamashita T
J Hand Surg Eur Vol 2013 Mar;38(3):267-71. Epub 2012 Jun 25 doi: 10.1177/1753193412450530. PMID: 22733700
Reconstruction for Wassel type III radial polydactyly with two digits equal in size.
Horii E, Hattori T, Koh S, Majima M
J Hand Surg Am 2009 Dec;34(10):1802-7. Epub 2009 Nov 7 doi: 10.1016/j.jhsa.2009.07.018. PMID: 19897319

Diagnosis

The anatomy of Wassel type IV-D thumb duplication.
He B, Liu G, Nan G
J Hand Surg Eur Vol 2017 Jun;42(5):516-522. Epub 2017 Feb 14 doi: 10.1177/1753193417691747. PMID: 28196434
A classification system for ulnar polydactyly and clinical series.
Duran A, Ciloglu NS, Buyukdogan H
J Hand Surg Am 2015 May;40(5):914-21. Epub 2015 Feb 21 doi: 10.1016/j.jhsa.2014.12.030. PMID: 25707550
Reconstruction for Wassel type III radial polydactyly with two digits equal in size.
Horii E, Hattori T, Koh S, Majima M
J Hand Surg Am 2009 Dec;34(10):1802-7. Epub 2009 Nov 7 doi: 10.1016/j.jhsa.2009.07.018. PMID: 19897319
Carpal coalition: a rare coincidence with hand deficiencies.
Sferopoulos NK, Tsitouridis I
Acta Orthop Belg 2003 Aug;69(4):317-20. PMID: 14526635

Prognosis

Modified Wassel-Flatt Type III Radial Polydactyly: Subtypes and Their Outcomes.
Kim JK, Yoon JO, Shin YH, Lee SH
J Hand Surg Am 2024 Jan;49(1):60.e1-60.e8. Epub 2022 Jul 6 doi: 10.1016/j.jhsa.2022.04.024. PMID: 35803781
Use of the duplication range concept for understanding morphology and predicting prognosis in thumb polydactyly.
Saito S, Makino A, Yamanaka H, Tsuge I, Morimoto N
J Hand Surg Eur Vol 2023 Jan;48(1):10-19. Epub 2022 Oct 6 doi: 10.1177/17531934221126864. PMID: 36204982
The anatomy of Wassel type IV-D thumb duplication.
He B, Liu G, Nan G
J Hand Surg Eur Vol 2017 Jun;42(5):516-522. Epub 2017 Feb 14 doi: 10.1177/1753193417691747. PMID: 28196434
Type IV-D thumb duplication: A new reconstruction method.
Abid A, Accadbled F, Knorr G, Darodes P, Cahuzac JP, Sales de Gauzy J
Orthop Traumatol Surg Res 2010 Sep;96(5):521-4. Epub 2010 Jul 1 doi: 10.1016/j.otsr.2010.01.013. PMID: 20594929
Reconstruction for Wassel type III radial polydactyly with two digits equal in size.
Horii E, Hattori T, Koh S, Majima M
J Hand Surg Am 2009 Dec;34(10):1802-7. Epub 2009 Nov 7 doi: 10.1016/j.jhsa.2009.07.018. PMID: 19897319

Clinical prediction guides

Modified Wassel-Flatt Type III Radial Polydactyly: Subtypes and Their Outcomes.
Kim JK, Yoon JO, Shin YH, Lee SH
J Hand Surg Am 2024 Jan;49(1):60.e1-60.e8. Epub 2022 Jul 6 doi: 10.1016/j.jhsa.2022.04.024. PMID: 35803781
Use of the duplication range concept for understanding morphology and predicting prognosis in thumb polydactyly.
Saito S, Makino A, Yamanaka H, Tsuge I, Morimoto N
J Hand Surg Eur Vol 2023 Jan;48(1):10-19. Epub 2022 Oct 6 doi: 10.1177/17531934221126864. PMID: 36204982
Opening wedge phalangeal osteotomy for correction of Wassel type IV-D thumb duplication.
Wang K, Ai F, Zhou P, Liu Z, Chen Z, Chen J
Handchir Mikrochir Plast Chir 2020 Apr;52(2):147-150. Epub 2019 Oct 9 doi: 10.1055/a-0893-6659. PMID: 31597168
Preoperative percutaneous arthrography provides detailed information for treatment of Wassel type IV thumb duplication.
Liu Q, Zhong L, Li H, Liu J, Zhu Z, Qu W, Li R
J Plast Reconstr Aesthet Surg 2018 Dec;71(12):1717-1722. Epub 2018 Aug 24 doi: 10.1016/j.bjps.2018.08.003. PMID: 30366872
Type IV-D thumb duplication: A new reconstruction method.
Abid A, Accadbled F, Knorr G, Darodes P, Cahuzac JP, Sales de Gauzy J
Orthop Traumatol Surg Res 2010 Sep;96(5):521-4. Epub 2010 Jul 1 doi: 10.1016/j.otsr.2010.01.013. PMID: 20594929

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