A Rare Case of Extra Gigantic Digit of Sole

The classification of ulnar polydactyly exists of either two or three types. The two-stage classification according to Temtamy and McKusick involves type A and B. In type A there is an extra little finger at the metacarpophalangeal Joint, or more proximal including the carpometacarpal joint. The little finger can be hypoplastic or fully developed. Type B varies from a nubbin to an extra, non-functional little finger part on a pedicle. According to the three-type classification, type I includes nubbins or floating little fingers, type II includes duplications at the MCPJ, and type III includes duplications of the entire ray.