The absence of late recurrence after greater than or equal to 45 Gy. By McCollough WM, Marcus RB Jr, Rhoton AL Jr, Ballinger WE, Million RR International Journal of Radiation Oncology Biology Physics. International Journal of Radiation Oncology Biology Physics. Symptoms usually include hearing loss on the affected side. These tumors generally occur in people over the age of fifty.
Treatment is preferably surgery, but radiosurgery is an effective alternative.
Fractionated radiation therapy has also been used. With any of these treatments it is often difficult to preserve hearing. Linear accelerator-based stereotactic radiosurgery for acoustic schwannomas. By Mendenhall WM, Friedman WA, Bova FJ International Journal of Radiation Oncology Biology Physics. Most are very malignant, but a great many are neverthelesss curable.