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:
- Skeleton, especially the joints
- Heart and the aorta, which is the artery that leads from the heart
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:
- Family members with Marfan syndrome
- Increased age of parents at the time of a child's birth
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:
- Irregular heart rhythm
- Visual difficulties, including nearsightedness and vision loss
- Problems with bones, including loose joints, curved spine, and long limbs
- Tall, thin body
- Back pain
- Breathing problems
Interior of Heart
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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:
You may need to have your heart examined. This can be done with an
need to have a complete eye exam.
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:
Regular monitoring of the heart and aorta with:
- Regular check-ups
- Avoiding strenuous exercise or contact sports as directed by your doctor
- Heart medications such as beta-blockers
- Close monitoring of pregnant women with Marfan syndrome
- Surgery to repair or replace a defective heart valve or aorta
- Regular eye exams to check for eye problems
- Eyeglasses or contact lenses to correct myopia or problems with the eye lens
- Eye surgery for severe problems
- Regular physical exams to monitor for bone problems, especially during adolescence
- Orthopedic brace or surgery in severe cases
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.
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Marfan syndrome. EBSCO DynaMed website. Available at:
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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:
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Travis J. Medicine. Old drug, new hope for Marfan syndrome.
Science. 2006 Apr 7;312(5770):36-37.
Last reviewed July 2013 by Michael Woods, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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