I’m so sorry you have to endure another surgery for the rest of your tumor. One positive way to look at it is that hopefully your facial muscle tone and paralysis will improve greatly.
I did not have a second brain surgery but I did have the 12/7 facial nerve graft 4 days after my AN surgery. However, this second surgery was not a brain surgery. It was to connect my severed facial nerve to my tongue nerve in order to get movement and tone back in my paralyzed face. It worked.
As I can’t speak to your main concern about the middle Fossa surgery,, I will let others answer that for you. It is hard not to be anxious about brain surgery,, so I hope others that have had a second surgery will respond to you.
Best of luck next week,, have faith, and try to rely on the doctors to do what they know best.