Hello Teresa, and welcome to neuroTalk.

From what you've said in your introduction, I assume that you've already checked Arachnoid Cysts in our General Health Conditions & Rare Disorders Forum. Incase you haven't found it, here's the direct link : http://neurotalk.psychcentral.com/forum2.html

Do not despair. May I suggest the you post your own queries there as well. Hopefully one or more of our other members may still be able to give you the information that you seek.