1. Increased intracranial pressure and general symptoms Due to the rapid growth of the tumor and the severity of the surrounding cerebral edema, the symptoms of increased intracranial pressure appear earlier and significantly. 90% of the patients have headache, 70% of the patients have nausea and vomiting, more than 70% of the patients have optic papillae edema, 30%-40% of the patients are combined with fundal hemorrhage, resulting in vision loss of about 20% of patients, about 15% of the patients have adductor nerve palsy, and in the late stage about 15% of the patients have different degrees of consciousness impairment, and may have symptoms of brain hernia. About 15% of the patients have abducens nerve palsy, and about 15% of the patients have different degrees of consciousness and may have brain herniation symptoms in the late stage. The general condition of the patients is poor, and some of them are obviously emaciated. 20% of the patients have epileptic seizures, and most of them are limited seizures. As the tumor mostly involves the frontotemporal lobe and the cerebral edema is extensive, mental symptoms are also common. The common manifestations are slow reaction, apathy and so on. Meningeal metastasis mainly manifests as increased intracranial pressure and meningeal irritation, and local signs are rarely seen. Local symptoms: As the tumor damages the brain more seriously and is often multifocal, the local symptoms are significant and involve a wide range of areas. According to the location of the tumor, more than 40% of patients have hemiparesis, about 15% of patients have hemiplegia, about 10% of patients have aphasia, and about 5% of patients have hemianopsia. If the tumor is located in the cerebellum, there are nystagmus, ataxia, etc., and there are also posterior cranial nerve symptoms.