Polysyndactyly

Polysyndactyly or PPD4 is a form of preaxial polydactyly of fingers (see this term), a limb malformation syndrome, characterized by the presence of a thumb showing the mildest degree of duplication, being broad, bifid or with radially deviated distal phalanx. Syndactyly of various degrees of third-and-fourth fingers is occasionally present.

Short thumb

Hypoplasia (congenital reduction in size) of the thumb.


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PMID (PMCID)
1311046
 MIXED_SAMPLE Child
[Polysyndactylia with brachymetacarpia (Type Bonola)].
Kunze J, Lenz W, Sugiura Y, Yang TS.
Klin Padiatr. 1992;204(1):43-7.
Four cases of polysyndactyly from Japan, Taiwan and Turkey are described, which show similar short thumbs, metacarpals and middle phalanges as well as analogous malformations of the feet.