Syndactyly refers to webbing of fingers or toes.


During fetal development, fingers and toes are webbed.  Before birth, the webbing resorbs.  With syndactyly, resorbing does not occur and the digits remain webbed.  There are two kinds of syndactyly - simple syndactyly does not involve bones while complex syndactyly does.   Simple is more cosmetic, while complex can result in deformity of hand or foot development. 

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