A sixth finger is typically called a polydactyly, resulting in a hand with more than five fingers. The term itself refers to the condition of having extra digits. While sometimes referred to as hexadactyly (specifically referring to six digits), the more common and encompassing term is polydactyly.
Understanding Polydactyly
Polydactyly, or hyperdactyly, is a congenital anomaly present at birth. It affects both humans and animals, resulting in supernumerary fingers and/or toes. The extra digit's location and characteristics determine the specific classification. For example:
- Preaxial polydactyly: The extra digit is located on the radial side (thumb side) of the hand or tibial side (big toe side) of the foot.
- Postaxial polydactyly: The extra digit is located on the ulnar side (pinky finger side) of the hand or fibular side (little toe side) of the foot.
The extra finger is often simply described as a duplicate of the finger adjacent to it, based on its appearance and function.
It's important to note that while a sixth finger might be informally referred to as just an "extra finger," the medical term polydactyly provides a more accurate and informative description of this condition. The term hexadactyly, while sometimes used, is less common than polydactyly in referring to a condition of having six fingers or toes.
One in 1000 children are born with polydactyly, affecting one hand. The condition is often hereditary, frequently running in families. Surgical removal is a common treatment option, and the procedure's complexity is often dictated by the extra finger's structure and location.
