Anatomical Study of Preaxial Polydactyly in 158 Hands.

Islam, Saidul; Oka, Ichiro; Fujita, Shin

doi:10.1620/tjem.168.459

Cited by 12 publications

(13 citation statements)

References 2 publications

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“…In all races, Wassel type IV seems to be the most common while Wassel type I the least common (Table 3). Rudimentary duplication is very common in the Far Eastern populations (about 15% of all thumb duplications) and is relatively rare in Caucasians (Islam et al, 1992; Tada et al, 1983). In our series, rudimentary duplications were seen in 7.9% of cases.…”

Section: Discussionmentioning

confidence: 99%

“…Far east series (Islam et al, 1992) ( Saudi Arabia/Asia 3 -Two cases of Wassel type II with symphalangism of the radial ray -One case of Wassel type III with symphalangism of the radial ray Boutros et al (1998) USA/North America 1 Wassel type IV with symphalangism of the radial ray Current Study Saudi Arabia/Asia 2 -One case of Wassel type IV with symphalangism of the radial ray -One case of Wassel type III with symphalangism of the radial ray…”

Section: Wassel Typementioning

confidence: 99%

“…Thumb polydactyly is a relatively common congenital hand anomaly and several series have reported the distribution of its various types in the Caucasian and Far Eastern populations (Islam et al, 1992; Naasan and Page, 1994; Tada et al., 1983; Zuidam et al., 2008b). No data are available regarding the distribution of the types of thumb polydactyly in the Middle East.…”

Section: Introductionmentioning

confidence: 99%

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The distribution of the types of thumb polydactyly in a middle eastern population: a study of 228 hands

Al‐Qattan

2009

J Hand Surg Eur Vol

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Several series have reported the distribution of the types of thumb polydactyly in the Caucasian and Far Eastern populations. No data are available for the Middle East. A total of 196 Saudi patients (228 hands) with thumb polydactyly were reviewed. The most common type was Wassel type IV (33.8%) and the least common was Wassel type I (0.4%). A total of 26 hands (11.4%) did not fit into the classic Wassel types including 18 cases of rudimentary duplications, two cases of thumb triplication, and five cases of thumb duplication with symphalangism. Concurrent ipsilateral little finger triplication (one case) and contralateral thumb aplasia/hypoplasia (two cases) were seen and the developmental biology of these cases are discussed. After reviewing our results and other series in the literature, we concluded that Wassel types IV and I remain to be the most and least common types respectively in almost all races. However, the genetic pools of various races greatly affect the distribution of other non-classic duplications (unclassifiable by Wassel classification) such as rudimentary duplication in the Far East, triplication in the Southwestern region of the Netherlands, and symphalangism in Asia.

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Section: Discussionmentioning

confidence: 99%

Section: Wassel Typementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The distribution of the types of thumb polydactyly in a middle eastern population: a study of 228 hands

Al‐Qattan

2009

J Hand Surg Eur Vol

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“…Islam et al reviewed 158 duplicated thumbs, with review of the radiographic, intra-operative, and pathological findings. [5] Based on their intra- and post-operative findings, 23 % of the patients changed into a different classification compared to the preoperative diagnosis. In a separate study, Islam et al performed contrast arthrography in 20 patients at the start of their corrective procedure.…”

Section: Discussionmentioning

confidence: 99%

Radiographic Indicators of a Shared Epiphysis in Radial Polydactyly

Johnson

Melvani

Patel

et al. 2014

Hand (New York, N,Y.)

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Radiographic differences exist between children with separate and shared epiphyses. In patients with shared epiphyses, the radial thumb tends to be smaller, closer to the ulnar thumb, and less divergent. Threshold values were identified for predicting the status of the epiphysis based on the angle × interspace distance and the angle × interspace index. These values may be used to help determine in advance of surgery if a shared epiphysis exists.

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“…Types IVI represent distaltoproximal levels of thumb duplication, while type VII represents radial polydactyly with a triphalangeal component. Although exact occurrence varies across different case series, the 3 most common types of radial polydactyly are type IV (30-46 %), type II (9-23 %) and type VII (6-32 %) [26][27][28][29][30]. While easy to apply, the clinical relevance of the Wassel classification is limited by the inability to classify surgically important features of radial polydactyly (e. g. diverging components or hypoplasia).…”

Section: Classification ▼mentioning

confidence: 99%

Clinical Presentation, Surgical Treatment, and Outcome in Radial Polydactyly

Dijkman

Nieuwenhoven

Hovius

et al. 2016

Handchir Mikrochir plast Chir

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Radial polydactyly or 'thumb duplication' is the most common congenital upper limb anomaly ('CULA') affecting the thumb. The clinical presentation is highly diverse, ranging from an extra thumb floating on a skin bridge to complicated thumb triplications with triphalangeal, deviating, and hypoplastic components. Radial polydactyly can be classified into one of 7 osseous presentations using the Wassel classification, with type IV (45%), type II (20%), and type VII (15%) occurring most frequently. When faced with a radial polydactyly case, hand surgeons specialised in congenital anomalies must weigh the preoperative functional potential and degree of hypoplasia of both thumbs in order to decide whether to resect one thumb and reconstruct the other ('resection and reconstruction'), excise a central part of both thumbs and unite the lateral tissues into one thumb ('the Bilhaut procedure'), transfer the better-developed distal tissues of one thumb onto the better-developed proximal tissues of the other ('on-top plasty'), or discard both severely hypoplastic thumbs and pollicise the index finger. Mere excision of the hypoplastic thumb is rarely indicated since it often requires subsequent revision surgery. Even after being treated by experienced surgeons, about 15% of patients with polydactyly will need additional procedures to correct residual and/or new problems such as deviation from the longitudinal axis and joint instability. Nevertheless, radial polydactyly patients usually achieve unimpaired everyday hand function postoperatively.

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Anatomical Study of Preaxial Polydactyly in 158 Hands.

Cited by 12 publications

References 2 publications

The distribution of the types of thumb polydactyly in a middle eastern population: a study of 228 hands

The distribution of the types of thumb polydactyly in a middle eastern population: a study of 228 hands

Radiographic Indicators of a Shared Epiphysis in Radial Polydactyly

Clinical Presentation, Surgical Treatment, and Outcome in Radial Polydactyly

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