What is Polydactyly?

Also known as: polydactylism, hyperdactyly, thumb duplication, supernumerary fingers, supernumerary toes, extra fingers, extra toes, preaxial polydactyly, postaxial polydactyly, central polydactyly.

Polydactyly refers to a condition in which a child is born with extra fingers or toes. In some cases, the extra digit is just a small growth or bump coming off a regular toe or finger. In other cases, the extra digits can be fully formed, or anywhere in between.

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Reviewed by: Aaron J Berger, MD

This page was last updated on: 1/29/2019 3:21:13 PM