Whether a meningioma of 2cm is serious or not depends on the location of the tumor, whether it presses on brain tissues and nerves, and whether it causes clinical symptoms. Generally speaking, meningiomas at the base of the skull, such as those in the pterygoid ridge, olfactory groove, slope, and saddle nodes, are more difficult to operate, and it is more common for them to damage the cranial nerves, therefore, meningiomas in these areas generally cause more serious damage to patients. Non-skull base meningiomas such as cerebral convexity, parasagittal sinus, inner ventricle, and parafoveal meningiomas are relatively superficial in location, and are not as difficult to operate on, and the results of the surgery are better and relatively less serious. If the meningioma has already exerted pressure on the brain tissue and the patient experiences persistent dizziness, headache, epilepsy and other symptoms, this situation is more serious regardless of the size of the tumor and requires timely treatment.