My nine-month-old daughter was born with an extra finger on each hand and one foot. Her left hand is formed well with six fingers while the other hand has the sixth finger protruding at an angle. Her small toe on the right foot is forked. What is the best time to get her fingers operated on, will there be any side effects? Apparently, the doctors say that her other body functions are normal. Do we have to get her operated on by a plastic surgeon?
C. Chowdhury - Manama, Bahrain

Dr. Greene's Answer

Often I’ve heard expectant parents say, “I’ll be happy as long as she has five fingers on each hand and five toes on each foot.” Extra fingers and toes, however, are relatively common and usually present no long-term problem. Polydactylism, or having one or more extra fingers or toes, is probably the most common abnormality of development found at birth.

Polydactylism is reported in about 1-2 per 1000 children. However, many of the simpler cases are taken care of in the nursery by the obstetrician or pediatrician and don’t show up in these statistics.

An extra finger or toe may be nothing more than a nubbin of soft tissue with no bone formation, it may be a full digit that forks off one of the five normal long bones of the hand or foot, or it may be a complete extra digit with its own extra long bone in the hand or foot — or almost any variation between these possibilities.

The most common form of polydactyly is a small, soft, extra finger that contains no bone. Many of these can be easily treated at birth by a physician who ties a suture tightly around the base. The extra digit falls off, and the normal-appearing hand or foot heals quickly.

If there might be bone in the extra digits, X rays should be obtained to give a clear picture of what is going on. In some instances, it is still difficult to decide which digit should be removed, and close observation of the function of the hands and feet as they develop can give the answer.

Complex polydactyly is usually not repaired until a child is one year old. Generally, the digit that is best aligned with the long bones is saved. When the other digit is removed, sometimes transferring tendons from the amputated digit will make the one that remains more normal. Sometimes a joint needs to be reconstructed, or a bony prominence shaved. If the case is complex, an orthopedic or plastic surgeon with expertise in hands and feet is preferred. Usually the results are excellent.

I’m glad to hear that your daughter is otherwise healthy and normal. Children with polydactyly should have a thorough physical examination to look for other abnormalities. There are over 30 rare congenital syndromes in which polydactyly is present. Most children with extra fingers or toes, however, are the wonderful normal, miracles that expectant parents can’t wait to meet.

Last medical review on: December 09, 2010
About the Author
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Dr. Greene is a practicing physician, author, national and international TEDx speaker, and global health advocate. He is a graduate of Princeton University and University of California San Francisco.
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Recent Comments

Hey my son is 2 weeks old.he has a extra finger but it doesn’t have any bone.it has turn black and blue some days ago.what can be the problem? I was thinking to tie it off but since it has turn black and blue is it going to fall off on its own?? Need some help plz

My daughter is 19months old and she has been booked for surgery because she’s polydactyly in the 2hands and toes. Am just scared. Hope there won’t be side effects? Thank you.

I hope all went well with your daughters operation? my son is nearly 6 months old and we will be visiting Alder Hey hospital next month to discuss having 2 extra fingers and an extra toe removed. He has bone in all 3 extras, 2 are connected, but one is not and is not as formed aswell as the other 2. Was just if you can give me a parents view of how everything went with surgery and revovery. Thanks