Here's an X-ray (front view) of the hand of a young child showing six fingers (polydactyly). Swipe it up to see a left foot with the same condition. Polydactylism is a fairly common congenital abnormality. Chances are you'll see this at least once or twice, it's that common! The extra digit is usually a small piece of soft tissue that can be removed. It can contain bone without joints and rarely even be a complete functioning digit but people choose to remove it surgically due to social reasons.