This deformity is characterised by one toe lying on top of an adjacent toe. The most common toe affected is the fifth toe. When one of the central toes is involved the second toe is most commonly affected.
The aetiology of the condition is not well understood. It is though that it may be caused by the position of the fetus in the womb during development.
The condition may run in families so there may be a hereditary component to the deformity.