The Wassel classification is used to categorise radial polydactyly, based upon the most proximal level of skeletal duplication.[1]

Classification

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Type Level of duplication
I Distal phalanx
II Interphalangeal joint
III Proximal phalanx
IV Metacarpophalangeal joint
V Metacarpal
VI Carpometacarpal joint
VII Triphalangia

References

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  1. ^ "Orthobullets". Retrieved 27 October 2014.