Gamma Knife treatment is usually appropriate for patients with residual foci from meningioma surgery about two weeks after surgery. 1. Meningioma patients will experience edema of brain tissue and wound healing period after surgery, wait until the edema is absorbed and the wound is healed before considering Gamma Knife treatment to reduce the risk of bleeding. When to receive Gamma Knife treatment also depends on the patient’s specific situation after surgery, and the choice of treatment time is different for different patients. 2. Gamma Knife is to use radioactive rays to irradiate the patient’s lesion to destroy the tumor cells. Gamma Knife treatment for benign meningioma can only inhibit the development of the tumor, and some of the tumors will be reduced, but Gamma Knife treatment will not make the tumor disappear, and the tumor cannot be cured completely. Meningioma patients are recommended to take regular treatment under the guidance of doctors to avoid the development of the condition, even life-threatening.