Electroencephalogram (EEG) is generally unable to detect tumors, as it only reflects the electrophysiological activities of normal brain cells. Of course, if the EEG shows abnormalities, there may be tumors in the brain, but to further clarify whether there are tumors in the skull or not, it is necessary to do enhanced CT or enhanced MRI, especially the enhanced MRI of the cranial brain is the most accurate diagnosis of intracranial tumors in the current imaging methods. When there is a high degree of suspicion of intracranial tumors, surgical resection is required. After surgery, according to the type of pathology and clinical stage, in order to reduce the chance of local recurrence and distant metastasis, some brain malignant tumors also need local radiotherapy and oral temozolomide chemotherapy.