This term applies for a wide variety of partial and/or complete duplications of the phalanges of the big toe (sometimes including the 1st metatarsal). A partial duplication can present itself on x-rays as a notched phalanx, bifid phalanx or a broadened phalanx. Polydactyly affecting the big toe is called preaxial or hallucal polydactyly of the feet.
Synonyms:
exact_synonym:
Partial/complete duplication of the phalanges of the big toe; Polydactyly affecting the hallux; Preaxial hallucal polydactyly; Preaxial polydactyly of feet; Preaxial polydactyly of foot; Preaxial polydactyly of the feet; Preaxial polydactyly, feet