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Living with Brachydactyly-preaxial hallux varus syndrome

A very rare genetic limb condition with short thumbs and big toes, and learning differences.

Understanding Brachydactyly-preaxial hallux varus syndrome

Brachydactyly-preaxial hallux varus syndrome is a very rare limb condition present from birth, with short thumbs and short big toes that turn inward.

The shortening affects certain hand, foot, and fingertip bones, and the affected fingers and toes are bent away from the others. All reported people had intellectual disability. No new reports have appeared since 1994.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Short fingers or toes (brachydactyly)
  • Broad or extra thumb
  • Shortened hand and foot bones
  • Thick eyebrows that meet in the middle
  • Wide nasal bridge
  • Small lower jaw (micrognathia)

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
Is genetic testing available to confirm the diagnosis?
Which specialists should evaluate hands and feet?
What therapies can support learning?

Quick facts

Symptoms usually startNewborn
InheritanceAutosomal Dominant

Changes in genes cause this condition. It is autosomal dominant, so one changed copy of the gene is enough.

Genetic

Also known as: christian brachydactyly; dominant preaxial brachydactyly with hallux varus and thumb abduction; preaxial brachydactyly with hallux varus and thumb abduction

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Brachydactyly-preaxial hallux varus syndromeGARD ID 972 · 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 Brachydactyly-preaxial hallux varus syndrome.

Explore the Brachydactyly-preaxial hallux varus syndrome blog

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Explore actively recruiting Brachydactyly-preaxial hallux varus syndrome studies with HealthSpark.

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  • 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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