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Living with Grange syndrome

A rare condition affecting the blood vessels, with narrowed or blocked arteries, plus bone, finger, and heart differences.

Understanding Grange syndrome

Grange syndrome is a rare condition that mainly affects the blood vessels.

Arteries that supply the kidneys, brain, and heart may be narrowed (stenosis) or blocked (occlusion). Narrowed kidney arteries can cause chronic high blood pressure, and blocked brain arteries can cause a stroke. Other features can include short or fused fingers and toes, fragile bones, and learning disabilities. Most people also have heart defects present from birth. It is usually noticed in childhood.

Signs & symptoms

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

  • Narrowed arteries (arterial stenosis)
  • High blood pressure
  • Fused fingers or toes (syndactyly)
  • Bones that break easily
  • Learning disabilities
  • Heart valve leakage (aortic regurgitation)

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 autoimmune and inflammatory disease specialists, bone and joint specialists, brain and nervous system specialists and genetic specialists.

  3. Consider genetic testing

    Changes in YY1AP1 are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

Care & treatment

Care team
autoimmune and inflammatory disease specialists (rheumatologists); Bone and joint specialists (orthopedists or orthopedic surgeons); Brain and nervous system specialists (neurologists); 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
Can genetic testing confirm a change in the YY1AP1 gene?
How often should the arteries and blood pressure be checked?
How can I protect my bones and prevent fractures?

Quick facts

Symptoms usually startChild
InheritanceAutosomal Dominant, Autosomal Recessive
GenesYY1AP1

Changes in the YY1AP1 gene cause this condition. GARD lists both autosomal dominant and autosomal recessive inheritance.

GeneticNeurological

Also known as: grange occlusive arterial syndrome; grng; progressive arterial occlusive disease-hypertension-heart defects-bone fragility-brachysyndactyly syndrome; progressive arterial occlusive disease, hypertension, heart defect, bone fragility, brachysyndactyly syndrome

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Grange syndromeGARD ID 16697 · 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 Grange syndrome.

Explore the Grange syndrome blog

Explore research for Grange syndrome

Explore actively recruiting Grange syndrome studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Grange syndrome 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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