Gamma Knife Radiosurgery for Meningioma.

Since its first reported use in 1976 in Sweden, Gamma Knife (GK) radiosurgery has become an accepted treatment option for intracranial meningioma, either upfront, in combination with planned subtotal resection, or as adjuvant/salvage treatment. Initially, GK was used in patients unfit for a major surgical procedure or for high-risk meningiomas adjacent to critical neurovascular structures. However, with the availability of larger and increasingly long-term follow-up studies, the proven durability of GK in the treatment of meningiomas means that it has become a treatment option for younger patients who want to avoid the risks of open surgery. Here we review the current indications, radiobiology, and patient outcomes following GK for intracranial meningioma 50 years on from its inception.