This is a fear which has come and gone for me over the years. Because I'm thin, have long fingers, am slightly hypermobile (only really my fingers) and can do the hand and wrist sign, I'm worried I might have undiagnosed Marfan syndrome. I'm 23 and I have never had any dislocations, hernias or serious eye problems (I have slight longsightedness, which isn't the type of eye issue associated with Marfan by my understanding). I've had ECGs before and they've never found anything abnormal. Still, I'm worried that I could just be blissfully unaware and then one day suffer a ruptured aneurysm. I know this is probably unlikely, but it's really hard to shake.