Journal List > J Korean Soc Surg Hand > v.21(2) > 1106555

J Korean Soc Surg Hand. 2016 Jun;21(2):93-99. Korean.
Published online June 24, 2016.  https://doi.org/10.12790/jkssh.2016.21.2.93
Copyright © 2016. The Korean Society for Surgery of the Hand
Postaxial Polydactyly of the Hands and Feet in Monozygotic Twins
So-Min Hwang, Beom Park, Min-Kyu Hwang, Hyung-Do Kim, Min-Wook Kim and Jong-Seo Lee
Aesthetic, Plastic and Reconstructive Surgery Center, Good Moonhwa Hospital, Busan, Korea.

Correspondence to: So-Min Hwang. Aesthetic, Plastic and Reconstructive Surgery Center, Good Moonhwa Hospital, 119 Beomil-ro, Dong-gu, Busan 48735, Korea. TEL: +82-51-630-0199, FAX: +82-51-630-0145, Email: xmfmal@naver.com
Received December 06, 2015; Revised March 20, 2016; Accepted April 04, 2016.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


Abstract

Polydactyly is the most common congenital difference of the hand and foot presenting as a range of defects from minor soft tissue duplications to major bony abnormalities. Although polydactyly of the hand is reported to occur among approximately 1 in 1,000 live births, the co-occurrence of hand polydactyly on hands and polydactyly on feet is as rare as one out of 100,000 persons. We report a case of hand and foot polydactyly in twins. One of the twins had polydactyly on both hands and feet, the other had polydactyly on the right hand and both feet. Postaxial polydactyly in monozygotic twins appears on both hands and feet in a different form shows that polydactyly is caused by multiple factors. It has been reported that the mother's infection and drug in addition to hereditary factors are the causes for polydactyly, but since they are unknown yet, it is necessary to conduct a study of them.

Keywords: Congenital difference; Monozygotic twins; Polydactyly; Postaxial

Figures


Fig. 1
On the photograph of twin A, both hands contain one extra digit on ulnar side.
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Fig. 2
On the radiograph of both hands, 5th metacarpal head is wide.
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Fig. 3
On the photograph of twin A, both feet contain one extra digit on ulnar side.
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Fig. 4
On the left foot, 5th metatarsal head is wide (A). On the right foot, the 5th metatarsal bifurcate and become 'Y' shaped at its distal end (B).
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Fig. 5
On the photograph of twin B, left hand is normal (A). On the right hand, extra digit is pointing to the ulnar side (B).
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Fig. 6
Left hand radiograph is non specific (A). On the right hand, 5th metacarpal head is wide (B).
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Fig. 7
On the photograph of twin B, both foot contain one extra digit on ulnar side.
Click for larger image


Fig. 8
On the left foot, the 5th metatarsal head is 'T' shaped (A). On the right foot, the 5th metatarsal head protrude laterally (B).
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