I believe our reaction to the AN diagnosis is situational and will be affected by our attitude.
I was a healthy, active 63 at the time of my AN diagnosis with no history of medical problems. Frankly, I took my good health for granted because it had always been the norm for me. When, at my wife's urging, I finally saw the doctor, had my MRI and received the news that I had a large (4.5 cm) acoustic neuroma pressing hard on my brain stem and that had to be removed, ASAP, I was quite surprised and a bit scared, but not consumed with fear or in any kind of grief. Being an impatient type that likes being in control, I just wanted to get the darn thing out and get back to my rather pleasant life (I had just retired). I quickly realized that my having control over this situation was not going to be in the cards as I gave myself over to the numerous pre-op tests and the knowledge that I was effectively helpless to do anything but put myself in the hands of my very capable neurosurgeon and pray. A lot.
Long story short: the AN debulking surgery went splendidly with no complications. The subsequent, pre-planned FSR treatments (26) were uneventful. MRI scans showed tumor necrosis and the beginnings of shrinkage. I felt great and life was back to normal. I prayed some more, this time with thanks.
Through the whole process, I never grieved. I felt fortunate to still have good health at my age with none of the usual maladies common to sexagenarians. I viewed my AN experience as something that was 'fixable' and that I just wanted to get through and be done with. My recovery was relatively rapid (yes, I pushed it, luckily with no adverse consequences). I may have felt a bit annoyed that I had this rare growth on my acoustic nerve sheathing but I never grieved, even though it cost me my hearing in my left ear, a loss I have to deal with every day but after all this time, has become part of my 'new normal'. I freely admit that had I suffered post-op facial or other issues or had to deal with other non-AN health problems I might not have been quite as sanguine. However, my situation is what it is and as with every AN patient, unique to me. I do recommend staying as positive as one can when faced with this kind of medical problem. I did and I'm sure it was a major factor in how I handled it. That said, we all have to cope with life's problems as best we can, based on our individual situation and personality. I don't believe grieving would have been appropriate in my case but it may be for others. I do not presume to tell other AN patients how they should react to their diagnosis. Frankly, like many, I was somewhat relieved that the tumor wasn't malignant and that, alone, gave me a basis for optimism. I encourage other AN patients to look forward, as I did, and do your best to take control of the situation. Of course we cannot control every aspect of the medical situation but we certainly can control our attitude toward what we have to deal with and that attitude can be a hindrance - or a big help. The good part is that we, the individual, get to decide. I suggest that we try to choose wisely.
Jim