Hello robmblind, and welcome to NeuroTalk.

You certainly have been through some scary times lately.

I thought I'd point you towards our Aneurysm Forum, where you'll meet others in a similar situation to yourself, so here's the link to that: http://neurotalk.psychcentral.com/forum7.html

Unfortunately I don't know much about arachnoid cysts, but we do have a Forum for rare diseases, so maybe that's a good place to start if you'd like more information about that as well. Here's the link: http://neurotalk.psychcentral.com/forum87.html

Welcome again, I hope you get the answers you're looking for.