What Causes Macrodactyly? The cause of macrodactyly is unknown. Some believe an abnormal nerve or blood supply in the affected fingers or toes causes the condition. The condition isn’t inherited and isn’t caused by anything the mother did during pregnancy.

How common is macrodactyly?

Macrodactyly is an uncommon condition in which a baby’s toes or fingers are abnormally large due to the overgrowth of the underlying bone and soft tissue.

Why does my daughter have big hands?

A child’s hand with large fingers present in macrodactyly Macrodactyly is a congenital condition in which a baby is born with abnormally large fingers or toes due to an overgrowth of the underlying bones and soft tissue. Macrodactyly occurs more often in hands than the feet.