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Living with Marfan syndrome

An inherited condition of connective tissue that can affect the heart, blood vessels, eyes, bones, and joints.

Understanding Marfan syndrome

Marfan syndrome is a disorder of connective tissue, which gives strength and flexibility to bones, ligaments, muscles, blood vessels, and heart valves.

Signs vary widely in severity and timing. The two main features are a dislocated eye lens and problems with the aorta, the body's largest blood vessel. People are usually tall and slender, with long fingers and toes, loose joints, and a long arm span. Heart valve leaks are also common.

Signs & symptoms

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

  • Widened or bulging aorta (aortic aneurysm)
  • Dislocated eye lens (ectopia lentis)
  • Nearsightedness (myopia)
  • Tall height with long, slender fingers
  • Loose joints and flat feet
  • Funnel chest (pectus excavatum)

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, eye disease specialists and genetic specialists.

  3. Consider genetic testing

    Changes in FBN1 are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

  4. Connect with expert centers

    The Marfan Foundation may keep lists of experts for this condition.

Care & treatment

Care team
autoimmune and inflammatory disease specialists (rheumatologists); Bone and joint specialists (orthopedists or orthopedic surgeons); Eye disease specialists (ophthalmologists); Genetic specialists (geneticists)
Expert care
Expert lists: The Marfan Foundation
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 The Marfan Foundation and other patient organizations
  • 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
How often should my aorta and heart valves be checked?
How often should I have an eye exam for lens or vision problems?
Should my family members be tested for FBN1 changes?

Quick facts

Symptoms usually startany time in life
InheritanceAutosomal Dominant
GenesFBN1

Changes in the FBN1 gene cause this condition. It is inherited in an autosomal dominant way, so a change in one copy of the gene can be enough.

Genetic

Also known as: fbn1-related thoracic aortic aneurysms and aortic dissections; marfan syndrome type 1; marfan syndrome, classic; marfan syndrome, type 1; marfan syndrome, type i; marfan's disease

Patient organizations

Source: NIH GARD · Marfan syndromeGARD ID 16535 · 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 Marfan syndrome.

Explore the Marfan syndrome blog

Explore research for Marfan syndrome

Explore actively recruiting Marfan syndrome studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Marfan 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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