With all the extensive research I have done online after being diagnosed with AN in 2/2013, I have found that once hearing is lost, it will NOT likely return even after treatment, so in my opinion, it would be best to get treated as soon as possible IF your AN increases in size. That means monitoring your AN with MRIs every 6 months for a year or two and then yearly. This is known as Watch and Wait. I just completed CyberKnife treatment at Stanford Medical Center with Drs Chang and Gibbs so I won't know if my hearing will improve, remain the same, or get worse for another year or so. I have no vision issues, just hearing and balance. The impression I have gotten from the majority of patients on this forum who have been treated is their symptoms either remained the same or have gotten slightly worse. That is how I finally arrived at how I wanted my AN treated - by reading about what others went through after their treatment and deciding whether I wanted to go through that also. I didn't so I chose Cyberknife because quality of life was the most important thing to me at 65 years of age. Good luck on your journey.