It is not malignant and, though no one can give you an ironclad guarantee, the odds are extremely high that you will handle AN and then continue with your life. Therefore, after doing your research and making your choices, you almost have to cultivate a degree of trust and acceptance. And you can improve your odds of having a good outcome by researching your options, understanding your body and what AN is, talking to specialists in the different options, and getting tips from other patients on what kinds of things to ask and look into. For any surgical approach, there is some risk of recurrence, although it is normally an extremely slight risk. Therefore, it is important to do follow up MRIs as scheduled.
Recurrence is more likely after radiosurgery than after microsurgery.
However, in some cases a subtotal removal is done in surgery. This may be done in microsurgery, for example, to avoid unacceptable nerve damage. With subtotal resection, there are viable tumor cells left and the possibility of recurrence must be taken seriously. Recurrence after radiosurgery is a different issue from microsurgery, since the goals of the two approaches are fundamentally different. The goal of microsurgery is tumor removal.