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If your child has an extra finger on their hand, they might only need what’s called a surgical ligature. Your provider will tie a tight string or band around the base of the extra finger that cuts off its blood supply. A week or two later, the extra finger will fall off.
This process won’t hurt your baby or endanger blood flow to their other fingers or the rest of their body. Your provider will give you specific instructions to protect your baby’s hand during and after this process.
Surgical ligature is usually only used if your baby’s extra finger doesn’t have any bones or other connective tissues developed in it.
Your provider might remove your baby’s extra digit during an office visit. This is called an in-office excision. Your provider will numb the skin around your child’s extra digit with an injection. Then they’ll use a cautery device to remove the extra finger or toe. This technique uses a handheld device (probe) similar to a pen. An electric current heats the tip. This lets your provider seal off the skin around the extra digit while they’re removing it.
Your baby won’t feel anything while the extra digit is removed. The numbing injection might make them slightly uncomfortable, but they won’t feel any pain during the excision.
In-office excision is only an option if the extra digit isn’t connected to the rest of your baby’s hand or foot by bones.
If your baby’s polydactyly is on their feet — or if they’re not a good candidate for surgical ligature or in-office excision — they’ll need their extra digit surgically removed.
What type of surgery your child will need depends on which type of polydactyly they have and how developed the extra digit is.
Your provider might not recommend surgery to remove an extra digit until your baby is around a year old. They’ll explain which type of surgery your child will need and what to expect.