Hi Carolina,
My first post here. Saw your post and felt I must reply!
While I have not had the radiation treatment yet, I will in 3 months time. I am in Switzerland and at the hospital in Lausanne where I am being treated (CHUV), this is standard practice. They leave a little bit behind in order to ensure the nerves are not damaged. I just had my 3cm AN/VS removed on 17 Feb, only 5 days ago with good results - have some hearing left in my left ear, balance is OK and no facial nerve issues. It took 9 hours and I still feel in a fog which is annoying, but each day is better. The retrosigmoid scar is quite impressive!
My surgeon told me the remains of the tumor "ball up" after a few months making it easy to zap with radiation. They would normally use the gamma knife to do it, but now that importing radioactive substances into Switzerland is illegal, they cannot get the cobalt isotope for the GK machine and we will have to use another method.
Rest assured you are not the only one. And if you ask me, removing most of the tumor surgically and treating the small remainder with radiation makes good sense! It allows for the nerves to be preserved more easily.
Good luck!
Andy