MONDO_0008272 (polysyndactyly 4) is preaxial polydactyly characterized by the presence of a thumb showing the mildest degree of duplication, being broad, bifid or with radially deviated distal phalanx, occasional syndactyly of various degrees of third-and-fourth fingers, and duplication of part or all of the first or second toes and syndactyly. Also known as: PPD4, polydactyly, preaxial type 4, polydactyly, preaxial, type IV, preaxial polydactyly type 4.