Joseph ~
With your experience, you certainly have reason to be hesitant with undergoing GammaKnife. While I'm sorry to learn of the complications you've endured with attempting to rid yourself of your AN, I'm not a doctor and so, cannot offer you 'medical' advice. I
will comment that it shouldn't be
this hard to destroy an acoustic neuroma and that many of us know what receiving mixed signals from doctors is like: confusing.
As you may recall, I had my almost-5 cm AN 'debulked' (surgically reduced) to approximately 2.5 cm, then underwent FSR (26 sessions) which effectively destroyed the remaining tumor's DNA. Fortunately, I had next to no complications, even though the tumor had been pressing hard on my brainstem, pre-op. On that basis, I can state that FSR was very effective - for me. Although I sense that you may be leaning toward yet another surgery, alas, no one, least of all, me, can assure you that having your remaining tumor undergo the GK procedure
or surgery will not produce any complications. We hope, we pray, we encourage but we simply cannot guarantee anything. I know you're seeking a more definitive answer but I don't see how anyone can give you that. Ultimately, your treatment is a very personal decision. My best advice is to go with your instincts (also known as 'your gut'). I wish you success in whatever approach you choose.
Jim