Abnormal right thumb
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An accessory digit is noted on the radial side (pre-axial polydactyly) with duplicated proximal phalanx, corresponding to type IV of Wassel classification.
Radiological features of a pre-axial polydactyly type IV according to Wassel classification, which is the most common type of polydactyly.
Additional contributor: Dr Z Boudiaf, CHU Constantine Algeria