I empathize with you on your predicament.
I see that you have left out some important information (the exact site of the tumor) that would have helped us to offer a better opinion.
From the symptomatology,i assume that it is probably sub-tentorial.
There is no universally recognised choice of therapy for patients with astrocytoma grade II.The clinical course is generally said to be unpredictable.
Proliferation and genetic markers have been tried to identify subgroups of astrocytoma grade II with a rapid progressive clinical course.
I hope this information turns out to be useful to you.
MB BS, MS, FRCS(Edinburgh)