Preaxial foot polydactyly

What it means

Duplication of all or part of the first ray.

This term applies for a wide variety of partial and/or complete duplications of the phalanges of the big toe (sometimes including the 1st metatarsal). A partial duplication can present itself on x-rays as a notched phalanx, bifid phalanx or a broadened phalanx. Polydactyly affecting the big toe is called preaxial or hallucal polydactyly of the feet.

Rare diseases that can present with this9

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Partial/complete duplication of the phalanges of the big toe · Polydactyly affecting the hallux · Preaxial hallucal polydactyly · Preaxial polydactyly of feet · Preaxial polydactyly of foot · Preaxial polydactyly of the feet · Preaxial polydactyly, feet