Mount Sinai Hospital in Miami is excellent for cancer treatment.
Brain surgery is risky. Doctors will try to avoid it if they can, and try shrinking the tumor through other methods. Much will depend on whether or not the tumor is malignant, how old the tumor is, and the location of the tumor.
If doctors recommend going ahead with the surgery (get two opinions) it is because surgery will offer some hope for an extended lifespan beyond the prognosis of no surgery. In short, the one year survival odds might extend from 30% to 70%,. There is always a risk with brain surgery.