has part has part Preaxial hand polydactyly Preaxial foot polydactyly Polydactyly Preaxial polydactyly 2010-07-20T11:00:32Z HP:0100258 Polydactyly, preaxial UMLS:C0345354 A form of polydactyly in which the extra digit or digits are localized on the side of the thumb or great toe. SNOMEDCT_US:205135003