This IS very interesting! I have a diagnosed AN, which has been treated by proton therapy at MGH (like Laura) due to Dr's opinion that neuroma is on the facial nerve also. I am also a patient of Dr. McKenna.
I had various hearing and facial symptoms for about 3 years before diagnosis. In 2003, I had a diagnosed BPPV for dizziness and imbalance; in 2004, I had diagnosed "hemifacial spasms" which got progressively worse over the next few years; in 2005, I started complaining about hearing, and had the BAER test which was "normal" and an MRI with contrast that was misread for the AN (it WAS on there!). It was finally in 2006, with actual hearing loss, that another MRI pointed out the AN. In hindsight, I believe all of these other things were symptoms of the tumor. The facial problems were the worst, until the hearing loss.
Danielle, do ask about the possibility of radiation treatment w/o surgery, or get another opinion (Dr. McKenna is great!). Both MEEI and MGH Drs told me that they couldn't determine if my tumor was facial w/o surgery - couldn't tell from the MRI. And because of facial symptoms, thought that radiation treatment, and the proton in particular, would be less harmful to the facial nerve and other areas. And, since the treatment in Nov/Dec 2008, my facial spasms have decreased markedly - still have them on occasion, and they're different than before, but nothing like the way they were before.
There are different radiation treatments too - I went with the proton because of Dr McKenna's and Dr. Loeffler's recommendations.
Good luck!
Elaine