A genetic connective tissue disorder caused by a defect in gene FBN1, which codes for abnormal structure of fibrillin-1, a protein crucial for formation of normal connective tissue. Most critical is Marfan syndrome’s effect on heart and blood vessels, which tend to dilate and be at risk of rupture. Connective tissue in bones, ligaments, and other parts of the body is also affected.
Laryngologists may encounter Marfan syndrome because parts or all of the aorta may need to be replaced over time, due to abnormal dilation of the weakened arterial wall, with risk of rupture. When such surgery is done, the left recurrent nerve is at risk of injury, and this would lead to left vocal cord paralysis. With Marfan syndrome, it is rare to live to age 70.