Polysyndactyly refers to the combined presence of polydactyly as well as syndactyly involving either the hands or feet.
Polysyndactyly can be associated with a number of syndromes which includes:
-
acrocephalopolysyndactylies (GCPS)
- type I: Noack syndrome
- type II: Carpenter syndrome (typically soft tissue)
- type III: Sakati-Nyhan syndrome
- type IV: Goodman syndrome
- Greig cephalo-polysyndactyly syndrome (GCPS)
- hypertelorism-hypospadias-polysyndactyly syndrome