Preaxial polydactyly type 1

Alternate names[edit | edit source]

Thumb polydactyly; Polydactyly preaxial 1; Preaxial polydactyly 1; Preaxial polydactyly type 1; Polydactyly of a biphalangeal thumb; PPD1

Definition[edit | edit source]

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 source]

NIH info on Preaxial polydactyly type 1

Preaxial polydactyly type 1 is a rare disease.

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Rare diseases - Preaxial polydactyly type 1
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Also see	Comprehensive list of genetic and rare diseases
Resources	NIH GARD, US Genetic and Rare Diseases Info Rare Disease Day Undiagnosed Diseases Network Database of rare diseases at Orphanet Rare Disease UK Rare diseases search engine