**9.1 Meningioma eligible to microsurgery**

Microsurgery is the first choice if therapy is indicated and aims at radically removing the tumor if possible. However, the benefits of surgery have to be seriously balanced against the possible interventional related anesthetic risks. Also some patients, though having meningiomas eligible to surgery, refuse surgery due to personal reason. Ruge et al. analyzed 188 patients with 218 meningiomas that undergone LINAC radiosurgery with median tumor volume 4.2 cm3 (0.1–22) and mean marginal radiation 13+/−3.1 Gy. The estimated 2-, 5-, 10- and 15-year regional recurrence rates were 1.5%, 3.0%, 6.6% and 6.6%, which provides reliable longterm local tumor control with low rates of mild morbidity [34].
