What is Polydactyly preaxial?
• Polydactyly preaxial: A medical term for a hand defect where the thumb is partially or completely duplicated. The anomaly can range from a simple broadening of the end thumb bone with a division in the bone tip to a completely duplicated thumb which gives risk to the four subtypes of the anomaly. Ophanet, a consortium of European partners, currently defines a condition rare when it affects 1 person per 2,000. They list Polydactyly preaxial as a “rare disease”.
