I was diagnosed with a 12x10x13mm AN on June 25, 2013. A second MRI on November 14, 2013 showed growth to 14x12x16mm. On December 10, 2013 I had GK at Providence Gamma Knife Center in Portland with Drs Kim and Solhjem. Just received results of one year follow up MRI which shows some shrinkage to 13x11.5x13mm. I no longer experience facial numbness, dizziness, or balance issues. I do have mild tinnitus in both ears and my hearing on my AN side continues to get worse.
I should mention that almost immediately following my diagnosis I discovered that there was an ANA symposium scheduled for August in Los Angeles. I attended the symposium and found it to a very effective way to learn about the treatment of ANs. In particular there was a panel discussion of five or six very experienced doctors who debated the merits of the various treatment strategies. There was a surprising amount of disagreement and there was little reluctance from the doctors to hide their treatment biases. For me this was a great way to evaluate the treatment options and make an informed treatment decision. If you are watching and waiting and have the flexibility to wait until summer 2015 I highly recommend attending the symposium. Lots of certified smart people under one roof. And many of them are available for questions. Very useful.