What Causes Marfan Syndrome

Their are two causes for Marfan syndrome. One cause is a defect of chromosome 15 that occurs during development in the womb. They are born with the syndrome but many times may not be diagnosed until later in life when the signs and symptoms become more developed. This is because the gene mutation is a variable expression which means it shows in different ways for different people but still carries the same characteristics. Another cause for Marfan syndrome is the inheritance of the defective gene. Children with one parent who has the disease have a 50% chance of inheriting it. If both parents have the disease it is almost certain the child will be affected as well.