Accessory finger(s) Save

What are Accessory Fingers and How Do They Develop?

Accessory fingers, also known as polydactyly, is a congenital condition in which an individual has one or more extra fingers on their hand. The extra digit can be fully formed or only partially developed, and can occur on either hand or both. This condition is relatively rare, occurring in approximately 1 in every 700 births.

Accessory fingers develop during fetal development, typically during the first trimester. It is believed that genetics play a role in the development of this condition, as it can be inherited from a parent who also has accessory fingers. However, in some cases, the condition can arise spontaneously without any family history of polydactyly.

Types of Accessory Fingers

There are two main types of accessory fingers: preaxial and postaxial. Preaxial polydactyly is when the extra digit is located on the thumb side of the hand, while postaxial polydactyly is when the extra digit is located on the little finger side of the hand. There are also various subtypes of polydactyly, depending on the degree of development of the extra digit.

How is Accessory Finger Diagnosed?

Accessory fingers can often be diagnosed during a routine prenatal ultrasound. If the condition is not detected before birth, it is typically diagnosed shortly after delivery. A physical examination of the newborn's hands will be performed, and diagnostic imaging such as X-rays may be used to determine the extent of the extra digit's development.

Can Accessory Fingers be Treated?

While accessory fingers are generally not harmful, they can sometimes interfere with hand function or cause cosmetic concerns, especially if the extra digit is fully formed and functional. In cases where the extra digit is causing problems, surgical removal may be recommended. However, the decision to remove an accessory finger is typically based on individual circumstances and should be made in consultation with a healthcare provider.

1. Overall, accessory fingers are a relatively rare congenital condition that can occur during fetal development.
2. There are two main types of polydactyly, preaxial and postaxial, which describe the location of the extra digit on the hand.
3. Accessory fingers can be diagnosed through prenatal ultrasound or shortly after birth through physical examination and diagnostic imaging.
4. In cases where the extra digit is interfering with hand function or causing cosmetic concerns, surgical removal may be recommended.