Sharon ~
This is, indeed, a depressing turn of events. I'm not well-informed about the statistics for SBI and Dr. Shahinian but Dr. Friedman seems to be almost belligerently hostile to endoscopic surgery - to the point that I wouldn't take everything he stated as the 'gospel truth'. You have to remember that most doctors, especially surgeons, are always hostile to any radically new surgical procedure. It's taken years of positive outcomes for some surgeons to accept irradiation as a valid treatment for smaller acoustic neuromas. However, because this decision is so critical, I would not be shy about confronting Dr. Shahinian with the statements Dr. Friedman made to you regarding endoscopic surgery. This is too important to worry about ruffling a doctor's feathers. You might also consider asking the doctors at HEI their opinion on endoscopic surgery. In Dr. Shahinian's case, if he is the least evasive, dismissive or can't cogently explain why another doctor would make these kind of statements about endoscopic surgery for ANs, you would have to seriously re-consider your original, hard-won, treatment decision.
House Ear Institute has a good reputation and would not be a bad choice. However, no doctor or institution, no matter what surgical approach they may take, can guarantee the outcome of this kind of surgery, which is always challenging, to say the least. Endioscopic AN removal surgery does seem almost too good to be true, which sends up 'red flags' to me, but at one time, surgeons used a hammer and chisel to open up the skull of an AN patient and excise the tumor. This was 100 years ago and yes, the patient almost always died. Now, we have the MRI, microsurgery and radiation to safely treat acoustic neuromas. One day, every surgeon may embrace the procedure, as they have for other operations, and the the surgical procedures used today may seem antiquated. However, we live in the here and now and you have to choose what's available and what seems to be the safest procedure with the best chance of success - for you. No one else will have to endure the consequences of whatever surgery you choose, including Dr. Friedman, Dr. Shahinian - or anyone posting here.
Take your time, don't be shy about seeking and getting honest answers and of course, know that we're all supporting you as you struggle to make this decision - again.
Jim