The effect of Gamma Knife in the treatment of brain tumors is still relatively good, but it must be treated specifically according to the specific situation. Generally Gamma Knife is mostly used for tumors less than 3cm in volume, deeper location, lesions with greater surgical difficulty and risk, or recurrent tumors. However, Gamma Knife also has certain disadvantages, sometimes for malignant tumors, when there is no clear specific pathological type, Gamma Knife irradiation, often may stimulate further growth of the tumor in the short term, and may be more malignant than the original. Therefore, before doing gamma knife, it is recommended that the patient should at least do a stereotactic puncture and check for pathology, so that the pathological results can be clarified, and then develop a gamma knife (treatment) plan. Otherwise, in some cases, it is like a blind man exploring the road, and there will be more trouble ahead. Therefore, it is recommended that patients who undergo Gamma Knife must have the appropriate pathology type clarified before the procedure and whether they are really suitable for Gamma Knife treatment.