I was diagnosed with a 4mm AN about two weeks ago with an MRI. I have gotten an education these last few days about something I had never heard of before. My ENT didn't really seem to know much about doctors or treatment for this, so we are kind of on our own. We have used the ANA website quite a bit and have done quite a bit of research and have called a few places. We live near Louisville, KY, so Vanderbilt or Mayfield Clinic are more convenient and seem to both have great doctors and hospitals, but we are willing to go far to get the best treatment if we need to. My hearing has been impaired in my left ear, but it is still very useful, and I want to preserve it if possible. Thanks to everyone for the helpful comments on this site. We are leaning toward either Vanderbilt (even though I am a UK Wildcats fan) or Mayfield Clinic. Which one? Are we making a mistake by staying close to home? Where is the best place to go?