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Living with Syndactyly type 6

A rare limb condition with fused fingers on one hand and joined second and third toes.

Understanding Syndactyly type 6

Syndactyly type 6 is a rare limb condition in which fingers on one hand and some toes are joined.

The second to fifth fingers on one hand are fused, with the fingertip bones joined in a knot-like mass. The second and third toes are also fused. Some people have only webbing between the second and third toes. It occurs on its own, without other syndromes.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet. The summary describes:

  • Fused second to fifth fingers on one hand
  • Fingertip bones joined in a knot-like mass
  • Fused second and third toes
  • Toe webbing only (some people)

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

    Specialists who may be involved include bone and joint specialists and genetic specialists.

  3. Ask which tests can help

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

Care & treatment

Care team
Bone and joint specialists (orthopedists or orthopedic surgeons); Genetic specialists (geneticists)
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
Which surgeries could improve hand function, and when?
How will the toe fusion affect walking?
Is genetic testing available for our family?

Quick facts

Changes in genes (variants) cause this condition. GARD doesn't list which gene or how it is inherited.

Genetic

Also known as: mitten hand; syndactyly mitten type; syndactyly, mitten type; unilateral syndactyly of digits 2-5

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Syndactyly type 6GARD ID 21201 · 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 Syndactyly type 6.

Explore the Syndactyly type 6 blog

Explore research for Syndactyly type 6

Explore actively recruiting Syndactyly type 6 studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Syndactyly type 6 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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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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