Overview
Non-syndromic complex polydactyly is a rare condition where a person is born with extra fingers or toes that contain both extra bones and extra soft tissue (such as tendons, nerves, and blood vessels). The word 'complex' means the extra digit is fully or partially formed and connected to the hand or foot in a complicated way — not just a small skin tag. 'Non-syndromic' means the extra digits appear on their own, without other birth defects or health problems as part of a broader syndrome. This condition is present at birth and affects the hands, feet, or both. The extra digit can appear on the inner side (pre-axial, near the thumb or big toe), the outer side (post-axial, near the little finger or pinky toe), or in the middle of the hand or foot (central polydactyly). Treatment usually involves surgery to remove or reshape the extra digit, ideally in early childhood to allow the best possible hand or foot function and development. With proper surgical care, most children go on to have good function and a normal quality of life. The condition does not typically affect intelligence, internal organs, or lifespan.
Key symptoms:
Extra finger or toe present at birthThe extra digit contains bones, not just skinThe extra digit may be fully formed or partially developedExtra digit may be on the thumb side, little finger side, or middle of the hand or footPossible abnormal alignment or shape of nearby fingers or toesDifficulty gripping or using the hand if the extra digit interferes with normal fingersDifficulty wearing standard shoes if the foot is affectedPossible joint stiffness in the affected hand or footSkin webbing between the extra digit and neighboring digits in some cases
Variable
Can be inherited in different ways depending on the underlying gene
Neonatal
Begins at or shortly after birth (first 4 weeks)
Treatments
No FDA-approved treatments are currently listed for Non-syndromic complex polydactyly.
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Specialists
View all specialists →No specialists are currently listed for Non-syndromic complex polydactyly.
Treatment Centers
8 centersBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
🏥 NORDStanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🔬 UDNUCLA UDN Clinical Site ↗
UCLA Health
📍 Los Angeles, CA
🔬 UDNBaylor College of Medicine UDN Clinical Site ↗
Baylor College of Medicine
📍 Houston, TX
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
Travel Grants
No travel grants are currently matched to Non-syndromic complex polydactyly.
Community
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Caregiver Resources
NORD Caregiver Resources
Support, advocacy, and financial assistance for caregivers of rare disease patients.
Mental Health Support
Rare disease caregiving can be isolating. Connect with counseling and peer support.
Family & Caregiver Grants
Financial assistance programs specifically for caregivers of rare disease patients.
Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Questions for your doctor
Bring these to your next appointment
- Q1.What type of polydactyly does my child have, and how complex is the extra digit?,When is the best time to have surgery, and what does the procedure involve?,How many surgeries might my child need, and what are the risks?,Will my child have full use of their hand or foot after treatment?,Should we see a genetic counselor to understand if this could affect future children?,What therapy will my child need after surgery, and for how long?,Are there any signs I should watch for that would mean my child needs to be seen urgently?
Common questions about Non-syndromic complex polydactyly
What is Non-syndromic complex polydactyly?
Non-syndromic complex polydactyly is a rare condition where a person is born with extra fingers or toes that contain both extra bones and extra soft tissue (such as tendons, nerves, and blood vessels). The word 'complex' means the extra digit is fully or partially formed and connected to the hand or foot in a complicated way — not just a small skin tag. 'Non-syndromic' means the extra digits appear on their own, without other birth defects or health problems as part of a broader syndrome. This condition is present at birth and affects the hands, feet, or both. The extra digit can appear on the
At what age does Non-syndromic complex polydactyly typically begin?
Typical onset of Non-syndromic complex polydactyly is neonatal. Age of onset can vary across affected individuals.