
A 14-year-old boy who recently moved to the area comes to your practice for a sports physical. When you enter the exam room, you are immediately struck by his stature; he is tall and thin, with long arms and legs. He is also wearing glasses. You greet your patient first, and then stretch out your hand to greet Mom, who rises from a chair in the exam room. You note that Mom is markedly tall as well. The question for you is: Is this Marfan syndrome, or is your patient simply near-sighted and naturally tall?