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Marfan syndrome is a disorder that affects connective tissue. Connective tissues are proteins that support skin, bones, blood vessels, and other organs. One of these proteins is fibrillin. A problem with the fibrillin gene causes Marfan syndrome.
Marfan syndrome can be mild to severe, and the symptoms can vary. People with Marfan syndrome are often very tall, thin, and loose jointed. Most people with Marfan syndrome have heart and blood vessel problems, such as a weakness in the aorta or heart valves that leak. They may also have problems with their bones, eyes, skin, nervous system, and lungs.
There is no specific test for Marfan syndrome. Your doctor may use your medical history, family history, and a physical exam to diagnose it. Marfan syndrome has no cure, but treatments can help delay or prevent complications. Treatments include medicines, surgery, and other therapies.
NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases
- Learning about Marfan Syndrome (National Human Genome Research Institute)
- Marfan Syndrome (National Heart, Lung, and Blood Institute)
- What Is Marfan Syndrome? (National Institute of Arthritis and Musculoskeletal and Skin Diseases) Also in Spanish
Diagnosis and Tests
- Getting Diagnosed (Marfan Foundation)
- Beals Syndrome (Marfan Foundation)
- Emergencies (Marfan Foundation)
- Loeys-Dietz Syndrome (Marfan Foundation)
- What Are Related Conditions? (Marfan Foundation)
- Heart and Blood Vessels in Marfan Syndrome (Marfan Foundation) - PDF
- Marfan syndrome: MedlinePlus Genetics (National Library of Medicine)
- ClinicalTrials.gov: Marfan Syndrome (National Institutes of Health)
Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine)
- Article: Prevalence of unruptured intracranial aneurysms in patients with Marfan syndrome: A...
- Article: Fatigue in patients with syndromic heritable thoracic aortic disease: a systematic...
- Article: Aortic Dissection During Pregnancy and Puerperium: Contemporary Incidence and Outcomes in...
- Marfan Syndrome -- see more articles
Find an Expert
- Find a Genetic Counselor (National Society of Genetic Counselors)
- National Institute of Arthritis and Musculoskeletal and Skin Diseases Also in Spanish
- Marfan Syndrome (For Parents) (Nemours Foundation) Also in Spanish
- Marfan syndrome (Medical Encyclopedia) Also in Spanish