Many patients ask what kind of meningioma can be operated without surgery. In general, if the diagnosis is correct, the meningioma is less than 3 cm in diameter, and there are no meningiomas causing the appropriate symptoms, you can be dynamically observed and hold off on surgery. At first, the MRI is often repeated 2-3 months after the last examination, and if there is no change, the observation is continued. Subsequently, the review is repeated six months after the last MRI, and if there is still no significant increase in meningioma, the review interval can be set at one year. Special sites such as meningioma of the saddle node, meningioma of the pontocerebellar horn, etc., may have symptoms such as loss of vision and visual field defects when the tumor is relatively small, and the tumor may be 1-2 CM in diameter or even a few millimeters, which also requires surgery. During the observation period, if meningioma is found to be significantly enlarged or the peri-tumor edema is enlarged in scope, and signs of tumor progression such as corresponding symptoms appear, surgery should be arranged as soon as possible.