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The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs.
Orpha Number: 93339
Polydactyly of a biphalangeal thumb or PPD1 is the most common form of preaxial polydactyly of fingers (see this term), 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.
Visit the Orphanet disease page for more resources.
Source: GARD Last updated on 05-01-20
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