I read all of the above posts and it's very interesting. I was diagnosed with a 10mm cyst in 2007 and was supposed to follow up to see if it would grow but I never did. The Nuerologist assured me that there was 100% nothing to worry about bc she never saw a cyst turn into a tumor or never heard of one turning into a tumor. Recently, I've been getting dizzy spells and vision problems and I probably should do the responsible thing and follow up. But I guess I'm just scared of the results...