Marfan Syndrome?

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Marfan Syndrome?
Hi everyone,
My name's Ryan and I am 17 years of age, coming up to 18. I am 6'6" and pretty lean/thin. I have noticed that my limbs are quite long, I am flexible on my shoulders/forearms and legs, my fingers are thin thus seemingly long. As for my chest...I'm not too sure how to describe it, but I believe my rib cage and skin is further out than my lower torso. I have always had slight bags under my eyes (not easily noticeable) and just generall flexible. I can wrap my legs round my head, make my arms connect, my index finger and thumb tough when wrapped around my wrist. My toes seem quite big but maybe they are normal sized for a guy of my height.
I don't want to tell my parents because they would think I am worrying about nothing, but am I? Should I go to a doctor? I'm not worried or anything (I do have a touch of anaemia) as I'm an athlete and I am really fast at running as well as good at gymnastics (I've not done flips and the like because of my back, which I've injured seriously twice in my lifetime but never been paralysed.)
Am I worrying about nothing and perfectly normal? Or do I have a mild touch?
I'd be very grateful for some input.
Answer:

Marfan Syndrome?
Hi Ryan, thanks for joining the Forum. I've answered a similar question before, it's on the main site, please check it out:

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