My docs (neurotologist and neurosurgeon) both felt that my AN had grown between my diagnostic MRI and my surgery (approx. 6 weeks later), but neither had any idea why, since the majority of ANs are very slow growing. Guess I was just lucky
Mid-fossa isn't usually an option for most of us by the time we are diagnosed; translab & retrosigmoid or radiation are usually what most of us are offered. Those who are "eligible" for mid-fossa (due to size & location) should go with that approach if they opt for surgery because it offers the best chance of keeping the hearing.
What is most important in making your treatment decision is what you
are comfortable with; go with your gut. You don't want to second guess yourself after the fact. Everyone's journey and everyone's recovery is somewhat unique to them; you need to do what is best for you
I chose retrosigmoid because I had decent hearing in my AN ear and I felt it was worth a chance to try and save it. I knew the odds weren't on my side, but I didn't want to choose translab and wonder if I had my docs automatically destroy what hearing I had left if they could have possibly saved it. Long story short, my hearing nerve was wrapped around my AN and the choices were to destroy the nerve and remove the entire tumor or keep the nerve and leave part of the tumor. My neurotologist made the choice to remove the entire tumor and I totally support that decision; it's what I would have told him to do if I weren't asleep at the time. 4+ years post op I don't show any signs of regrowth, which reinforces his decision in my mind.
Some docs do combine the AN and BAHA surgeries, but some docs (like my neurotologist) don't like to combine them. No rhyme or reason that I know of - just the doc's personal choice.
I had my implant 9 months after my AN was removed - although I would have had it much sooner if my insurance company would have cooperated - and it was a very simple surgery. It was done on an outpatient basis and in my case it was done under local anesthesia; absolutely nothing like my AN surgery.