Marfan syndrome is a rare disorder. It causes a defect in the body’s connective tissue. Connective tissue supports and connects many of the body's structures. As a result, Marfan syndrome affects many organ systems, including:
Marfan syndrome is caused by a defect in a gene. The gene controls a protein needed to build connective tissue.
In almost all cases, the defective gene is passed from a parent. In rare cases, the defect can be caused by a mutation.
Factors that increase your risk of Marfan Syndrome include:
Symptoms of Marfan syndrome range from mild to severe. It can affect one or many parts of the body. Some symptoms may be evident at an early age. Others may develop later in life. Some symptoms may worsen with age.
Symptoms depend on the parts of the body affected by Marfan syndrome:
Marfan syndrome is difficult to diagnose. There is no specific test for the condition. A physical exam will be done. It will study your medical history and your family's medical history. Other tests that may be done include the following:
If you have Marfan syndrome, your first-degree relatives, such as parents, brothers, and sisters, should be screened for the disorder.
There is no cure. Treatment is aimed at preventing or reducing complications or symptoms.
Treatment may include:
Your doctor may recommend exercises or medication to relieve pain caused by spinal weakness.
There are no guidelines for preventing Marfan syndrome. You can contact a genetic counselor to determine the risk of passing the condition on to your child.
American Academy of Family Physicians
The National Marfan Foundation
The College of Family Physicians of Canada
Canadian Marfan Association
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http://www.marfan.org/marfan/2280/About-Marfan-Syndrome. Accessed July 30, 2013.
Marfan syndrome. EBSCO DynaMed website. Available at:
http://www.ebscohost.com/dynamed. Updated March 21, 2013. Accessed February 14, 2013.
Moura B, Tubach F, Sulpice M, et al; Multidisciplinary Marfan Syndrome Clinic Group. Bone mineral density in Marfan syndrome. A large case-control study.
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Premedication (antibiotics). American Dental Association's Mouth Healthy website. Available at:
http://www.mouthhealthy.org/en/az-topics/p/Premedication-or-Antibiotics.aspx. Accessed July 30, 2013.
Travis J. Medicine. Old drug, new hope for Marfan syndrome.
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Last reviewed July 2013 by Michael Woods, MD
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