Justasis:
So sorry to learn of your sisters AN and resulting post-op complications. It sounds as if her original surgeon was somewhat less than fully competent, which is, sadly, more common than it should be. The MRI will tell you what comes next but if its clear that she needs surgery, please, please, don't be panicked into choosing a neurosurgeon (and team) that may be less-than fully experienced in Acoustic Neuroma removals. Although a neurosurgeon may be well educated and fully certified in his field, that doesn't mean he (or she) is very experienced in AN removal....and that lack of experience can cause problems.
We're all AN patients on one 'side' or the other (pre or post-op) or close to an AN patient, as you are with your dear sister. Know that we will be here for you, individually and collectively, and that you can vent, question or post whatever you wish concerning this experience. That is the raison d'être for this message board. Feel free to avail yourself of it and it's members.
I wish you and your sister the very best and will say a prayer for you, both, tonight.
Jim
