The doctor that you have no chance of saving your hearing (I assume that's what you mean by "100% chance of SSD") must be recommending a translab procedure. My understanding is that the ear is moved out of the way and the ear drum, hearing nerve, etc. are removed to get at the tumor. This was what the first surgeon I was referred to suggested. I got a second opinion from doctors at Mass General that recommended a retrosigmoid approach that enters the skull from behind the ear, and they said had a 50-50 chance of saving my hearing, and I chose this approach. Unfortunately, I did lose my hearing during the surgery, and I've had one of the common outcomes of retrosigmoid surgery, headaches, since about five weeks post op. They've gotten progressively worse and I wake up at night fairly often, with extreme pain, and have to take tylenol with codeine in order to bring the pain down to a level that I can tolerate enough to get back to sleep. The pain never totally goes away. I had been taking so many NSAID drugs (aspirin, ibuprofen, alleve) that my stomach was extremely upset to the point of eating became difficult and I've lost 20 lb. My PCP has told me to only take tylenol, which I'm trying to do, and my stomach is feeling better but not great.
I know this is a bit long winded, but what I'm trying to say is that, unless your tumor is of the size that your health is in immediate danger due to something like pressure on your brain stem, you should take your time and do some research. These tumors usually do not grow quickly, so you may have time to check out you options. There is an enourmous amount of information in this forum. I suggest you search the site to get as many of your questions answered as you can before you decide on how to proceed. If your tumor is not growing, you may not need to have it removed at all. My neurotologist has 1200 patients that are in the "watch and wait" mode, having periodic MRI's to keep make sure the tumor is not growing.