yes this is true you can have graves and be only hypo I have had this since May I have never been HYPER only Hypo with graves and it is very rare, It is also very hard for people to understand, but from what my specialist tells me there are only 2% of us with this ,I am glad to see that someone else has asked this question besides me . but it is true and we are a rare type, and I have looked every where for info on this and come up empty