Hi Joanne,
My AN was 1.8cm when I was diagnosed in May 2012. I had similar symptoms to you, but I also developed balance problems. I was told these tumors grow very slowly and I had plenty of time to make a decision on treatment. I choose to take my time and do lots of research in the hopes that my AN would not grow and I could wait and watch. I had one MRI done 6 months after diagnosis and there was minimal change. My symptoms started to change over the next 6 months and I requested another MRI as I was coming up to my first year post diagnosis. My June 2013 MRI showed the AN had grown to 2.4cm!! I knew I had to do something due to the speed my AN was growing and decided on Gamma Knife. At this size, Gamma Knife offered me a one day treatment. I did not want to wait until the tumor grew any larger and go through the fractionated treatment and for many reasons I did not wish to pursue surgery. My neurosurgeon explained to me that when the tumor grows so do your risk percentages for complications with each treatment, so I wasn't willing to watch my AN grow any further. My Gamma Knife treatment was Sept. 11.
If you choose to wait and watch, definitely make sure to have yearly MRI's. If you choose to go ahead with Gamma Knife don't worry about the head frame. It's not pleasant but there are far worse things one can go through. In my case I requested an Adivan to calm me down prior to the frame being put on. The neurosurgeon used needles to freeze each spot where the frame would be attached. I ended up with my entire skull frozen so that other than having a slight pressure feeling from the frame, there was no pain. The needles that froze me just felt like a sharp pinch. You are kept comfortable the entire time the frame is on.
It's a big decision so take your time and make sure you are comfortable with your final choice.
Best of luck!
Cathie.