Non-syndromic complex polydactyly

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ORPHA:498470
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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

Inheritance

Variable

Can be inherited in different ways depending on the underlying gene

Age of Onset

Neonatal

Begins at or shortly after birth (first 4 weeks)

Orphanet ↗NORD ↗

Treatments

No FDA-approved treatments are currently listed for Non-syndromic complex polydactyly.

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No actively recruiting trials found for Non-syndromic complex polydactyly at this time.

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No specialists are currently listed for Non-syndromic complex polydactyly.

View NORD Rare Disease Centers ↗Undiagnosed Disease Network ↗

Treatment Centers

8 centers
🏥 NORD

Baylor College of Medicine Rare Disease Center

Baylor College of Medicine

📍 Houston, TX

🏥 NORD

Stanford Medicine Rare Disease Center

Stanford Medicine

📍 Stanford, CA

🔬 UDN

NIH Clinical Center Undiagnosed Diseases Program

National Institutes of Health

📍 Bethesda, MD

🔬 UDN

UCLA UDN Clinical Site

UCLA Health

📍 Los Angeles, CA

🔬 UDN

Baylor College of Medicine UDN Clinical Site

Baylor College of Medicine

📍 Houston, TX

🔬 UDN

Harvard/MGH UDN Clinical Site

Massachusetts General Hospital

📍 Boston, MA

🏥 NORD

Mayo Clinic Center for Individualized Medicine

Mayo Clinic

📍 Rochester, MN

👤 Mayo Clinic Center for Individualized Medicine

🏥 NORD

UCLA Rare Disease Day Program

UCLA Health

📍 Los Angeles, CA

Travel Grants

No travel grants are currently matched to Non-syndromic complex polydactyly.

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Community

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Latest news about Non-syndromic complex polydactyly

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Caregiver Resources

NORD Caregiver Resources

Support, advocacy, and financial assistance for caregivers of rare disease patients.

Mental Health Support

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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.