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Radiology News


Unusual Pre-axial Polydactyly

The preaxial polydactyly represents a complete or partial duplication of the thumb. It is the most common duplication pattern in white and Asian populations. The longstanding classification of thumb polydactyly was initially described by Wassel in 1969. Wassel's classification is the most common used classification. 

However, this plain film is atypical with rudimentary duplicated metacarpal and rudimentary duplicated proximal phalanx on the ulnar side of the thumb. Triphalangeal thumb is noted as well.  This can be an example of rare triplicated thumb. 

Unusual Pre-axial Polydactyly Reviewed by Sumer Sethi on Tuesday, April 30, 2013 Rating: 5

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