Hi Sheryl,
I had/have a colloid cyst in the 3rd ventricle. Had surgery in 1986 to remove it, but the doc decided to drain it instead. He felt removing it would put me in danger because of it's location. That type of surgery has improved so much since 1986, I've heard. Are you having any symptoms? I only had minor symptoms prior to surgery. Good luck and let us know how you are doing.
Sandy