At my doctors appt. yesterday, he was poking thru my charts looking for my old holter monitor results & I saw my MRI report which I was never given the results except that it showed no chiari malformation (thats what it was checking for). Anyways I asked him if it was read by anyone other then the chiari specialist & he checked it out & said it was fine & I had a cyst (he made a circle a little bigger than a quarter) it was no big deal, lots of people have them, that it was just a pocket of fluid. He said it occurs in those with sinus problems usually, which I don't have. He made it quite clear that it was nothing to worry about. I have never heard of such a thing - do most of you have these cysts?