Hi, im a 42 year old male and was diagnosed with a CPA brain tumor (9mm by 14mm). The doctors believe it to be a meninginoma. I've seen doctors at Cedars Sinai and UCLA and both had differing opinions on my options. SRS was one the other was "wait and observe". I am uncomfortable with either, waiting for it to grow and get worse is scary and SRS could have unintended consequences that seem to be counter productive to the problem. I read about proton treatment and was wondering if that is a solution that is worth the risk, given the surrounding tissue is less affected than SRS. Are the long terms side affects well understood?