According to the characteristics of pathology, gliomas are divided into grades one to four. Grade one is a low-grade malignancy, more benign tumor, accounting for about 5%, with a relatively high probability of successful surgical outcomes. Grade two accounts for about 35%, and after comprehensive treatment including surgery, the survival rate can reach five to ten years, or even longer. Grade three usually develops from grade two, with relatively poor prognosis, and the average survival period is about two years. Grade four, the most malignant glioma, also known as glioblastoma, accounts for about 30%-40%, with an average survival period of less than one year, and very poor outcomes.