Who is at risk for Marfan Syndrome? ?
People at highest risk for Marfan syndrome are those who have a family history of the condition. If you have Marfan syndrome, you have a 50 percent chance of passing the altered gene to each of your children.
                
Marfan syndrome affects about 1 out of every 5,000 people in the United States. Men, women, and children, and people of all races, can have the condition.