Meningioma is a benign intracranial tumor, second only to glioma in incidence, accounting for about 25% of intracranial tumors. Because the tumor is benign, most of them can be cured, so we don’t need to worry and fear too much. I know the treatment effect of meningioma can be divided into 3 types: 1. 100% tumor removal, no sequelae (such as hemiplegia, aphasia and visual impairment, etc.); 2. 2.Major resection of tumor with no sequelae; 3.Complete or major resection of tumor with obvious sequelae, which is the least desirable, and generally we should strive for the first effect and make every effort to avoid effect three. Factors affecting the surgical treatment effect of meningioma: 1. Location of tumor: The location of tumor is an important factor affecting the treatment effect of meningioma. Meningioma can occur in many parts of the skull, convex surface, pars falciformis, paranasal sinus, supratentorial or infratentorial, pars saddle, cavernous sinus, olfactory groove, ventricle and so on. Simply put, the difficulty and risk of surgery can vary greatly depending on the location. 2.Tumor size: Generally speaking, for tumors in the same location, the smaller the tumor, the smaller the risk of surgery. 3.Tumor blood flow: The number of blood vessels inside the same meningioma can be very different, of course, those with rich blood flow are more risky to operate. (1) Preoperative assessment ability, the three factors mentioned above can be accurately assessed by experienced surgeons through careful analysis of imaging data; (2) Surgical skills and operation ability, including control of bleeding, use of different methods of tumor resection, pulling strength of brain tissue, separation and protection of blood vessels and brain tissue around the tumor, etc.