there is Aarskog Syndrome which causes distortions in the physical and mental frame of the person, not usually noticeable until about three years old. that is the only one i know a little about, but this website could help, http://funadvice.com/r/14sc4n5bg96
well you have Huntington's Disease. for some reason that is the only one i can think of, if i remember in the morning ill look in my genetic notes from last year and ill tell you some more. but keep in mind all genetic disorders are rare.
noassatol