Preaxial polydactyly type 1
Alternate names[edit]
Thumb polydactyly; Polydactyly preaxial 1; Preaxial polydactyly 1; Preaxial polydactyly type 1; Polydactyly of a biphalangeal thumb; PPD1
Definition[edit]
Polydactyly of a biphalangeal thumb or PPD1 is the most common form of preaxial polydactyly of fingers , a limb malformation syndrome, that is characterized by the duplication of one or more skeletal components of a biphalangeal thumb. Hands are preferentially affected (in bilateral), and the right hand is more commonly involved than the left.
NIH genetic and rare disease info[edit]
Preaxial polydactyly type 1 is a rare disease.
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Rare diseases - Preaxial polydactyly type 1
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