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Living with Crossed polydactyly, type I

A rare birth difference of the hands or feet with both extra fingers or toes and webbing between them.

Understanding Crossed polydactyly, type I

Crossed polydactyly, type I is a rare birth difference of the hands or feet with both extra digits and webbing of the digits.

Polydactyly means having extra fingers or toes. Syndactyly means fingers or toes are joined together by skin, creating webbed digits. People with this condition have both features at once.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet. Its summary mentions these:

  • Extra fingers or toes (polydactyly)
  • Webbed fingers or toes (syndactyly)

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Your doctor may refer you to a specialist who knows rare conditions.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
A doctor familiar with rare conditions, plus specialists as needed
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with rare disease patient organizations for support
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Is surgery to separate or remove digits recommended?
When is the best time for treatment?
Would genetic testing help our family?

Quick facts

GARD doesn't describe a cause for this condition yet.

Also known as: cp1

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Crossed polydactyly, type IGARD ID 1616 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Crossed polydactyly, type I.

Explore the Crossed polydactyly, type I blog

Explore research for Crossed polydactyly, type I

Explore actively recruiting Crossed polydactyly, type I studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Crossed polydactyly, type I with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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I can help you find recruiting Crossed polydactyly, type I studies. Enter a ZIP code, address or city below and I'll look within 50 miles.

Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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