Could my 15 year old daughter have Marfan's syndrome?

She has a protruding collarbone, which just seems to be getting worse. She is short (5 feet) yet she has very long arms. Her arm span is 5 feet 6 inches. She also has some of the other signs-very flexible hand (can pull thumb back to arm) and when she puts her thumb and pinky around her other wrist there is extra space left over. She also had an overbite (corrected by braces), has myopia, has a heart murmor and occasional heart palpitations. She is very thin and has a narrow face.

My husband thinks I am crazy because she is short and there is no family history.

It is a good thing that you are concerned, but how did you come upon Marfans?
One thing I have to mention is that it is NOT always inherited, about 25% of people with Marfans are spontaneous mutations.
One of my friends who has Marfans is only 5'2", so being tall does not always figure in. You should take her to a cardiologist and ask for an Echo-cardiogram, that will tell you if she has any aortic involvment. You should also contact the National Marfan Foundation for more information on the disorder.
She may have Marfans or she may have another connective tissue disorder, many are quite similar. So see your doctor and express your concerns, and if your doctor tells you all people with Marfans are tall, get another doctor. The NMF can get you a list of doctors in your area who know about
Marfans. And if I can be of any further assistance please feel free to contact me.

usually they tend to be taller and willowy looking, but it stands a chance but to be sure you really need to take her to her dr. and discuss your concerns with them. i know later in life they tend also to have a lot of pain so it is something that should be looked into and eliminated if possible.

The Marfan syndrome is a connective tissue disorder. Connective tissue provides substance and support to tendons, ligaments, blood vessel walls, cartilage, heart valves and many other structures. In the Marfan syndrome, the chemical makeup of the connective tissue isn't normal. As a result, many of these structures aren't as stiff as they should be.

The Marfan syndrome is inherited and affects many parts of the body. There's no single conclusive test for diagnosing it, but people who have it often have many similar traits. Besides perhaps having heart problems, people with the Marfan syndrome are often tall and thin. They also may have slender, tapering fingers, long arms and legs, curvature of the spine and eye problems. Sometimes the Marfan syndrome is so mild that few (if any) symptoms exist. In the most severe cases, which are rare, life-threatening problems may occur at any age.

Treatment includes antibiotics, and other procedures to decrease mortality.

Based on the description of Marfan's syndrome, I guess you child has this disease.Its better to approach a physician, if you failed to do.

Marfan's syndrome is a genetic defect maybe in your child's case the genetic defect is dominant and recessive in your other relatives that's why you've seen other relatives who do to have this disorder.

Just expalin it to your husband it's not your fault why your child has this.

just seek medicla attention.

Hope everything will be okay..