What are the most serious complications of Marfan syndrome?
Cardiovascular complications are the most serious in Marfan syndrome, particularly weakness of the aorta, the main artery that carries blood from the heart to the rest of the body. This weakness can lead to aortic dilation or dissection, which is a life-threatening emergency requiring immediate medical intervention. The syndrome can also affect heart valves, causing them to leak or fail to function properly.
Cardiovascular Complications
Heart and blood vessel problems are the most critical in Marfan syndrome. The most notable of these is aortic dilation, where the artery walls weaken and bulge. If the aortic wall tears (dissection), it constitutes a life-threatening emergency requiring urgent medical care [2]. Additionally, heart valves can be affected, leading to prolapse or leakage. If the leakage is severe, it can force the heart to work harder and affect its ability to pump blood efficiently [2]. Medications and surgery can help manage these conditions or prevent them from worsening [1].
Eye Complications
Marfan syndrome also includes serious complications that can affect the eyes. These include ectopia lentis (lens dislocation), where the lens moves from its normal position, often leading to vision changes [2]. Cataracts, which are cloudy areas in the lens of the eye, can also occur [2]. Retinal detachment is another potential complication, where the nerve layer at the back of the eye separates from its normal position [2]. People with Marfan syndrome must have regular eye exams to detect and treat these problems early.
Skeletal Complications
Marfan syndrome affects the skeletal system, causing symptoms such as disproportionately long limbs, flexible joints, and curvature of the spine [2]. The chest wall can also be affected, where the sternum may protrude outward or cave inward [2]. Although these problems may not be directly life-threatening like cardiovascular complications, they can significantly impact the patient's quality of life and require medical management, such as physical therapy or surgery in some cases.
Other Complications
In addition to the aforementioned complications, Marfan syndrome can affect other body systems. Pneumothorax may occur, where air leaks from the lung into the chest cavity [2]. The tissues surrounding the spinal cord can also be affected, leading to a condition called dural ectasia, where these tissues weaken and stretch [2]. These complications can lead to a variety of symptoms that require evaluation and treatment by specialists. To learn more about Marfan syndrome in general, you can visit Marfan syndrome: A genetic disorder affecting the body's connective tissue (Arabic).
Medical references
Cite this answer
ClinicsJo Editorial Team. What are the most serious complications of Marfan syndrome? (Sep 13, 2026).
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