Hi Joseph,
I had two surgeries, one in 1988 for a giant 6x3x3 cm AN and one in 2007 for a 2.5cm regrowth. Both tumors were connected to the brainstem and the second one was only at the brainstem (leftover from the first surgery), so I faced the same situation. Since the second surgery, I already regained my balance and most of the energy. Most of the hemiparesis I ended up with is gone, my facial nerve was saved both times. All of the tumor appears gone at MRI. Life is good now. I am sorry you have to go through this but hope your nightmare will be over soon.
I visited a lot of neurosurgeons and radiation specialists before my second surgery and can recommend in your case only those that deal successfully with very large tumors at the brainstem. I noticed that you are in CT, so my first recommendation is Dr. Sen (St. Lukes Roosevelt hospita in New York. He will explain your situation to you in detail without pressuring you to make a decision either way. He is absolutely worth a trip to NY. Another good thing about his consult is that he accepts so many insurances, so at least financial aspect will hopefully be taken care of. Secondly, House Ear Clinic (which you already got a recommendation for) has a stellar reputation. They do a lot of ANs of all sizes, give free consult over the phone and respond very quickly. Both Dr. Sen and HEI did repeat surgeries more than a few times.
I am really surprised that your first surgery was middle fossa. It is usually done on a small tumor in an attempt to preserve hearing. Are you sure it wasn't retrosigmoid? If that is the case, then endoscopic surgery at SBI can go through the existing metal in your head and you will end up with painless brain surgery, like I did. They are expensive though and that puts off a lot of people.
Who were the surgeons in your case and why only 50% of tumor was removed? What is their recommendation regarding the remaining part? You can PM me if have you want.
Eve