The number of years you can live with grade 2 and grade 3 gliomas is not entirely conclusive, and is related to factors such as tumor grade, degree of tumor resection, and radiation and chemotherapy. In clinical practice, grade 2 gliomas are categorized as low-grade gliomas and grade 3 gliomas are categorized as high-grade gliomas. Survival rates for low-grade gliomas are better than high-grade gliomas in most cases. In addition to this, surgery is the primary treatment and diagnostic tool for low-grade gliomas to clarify the pathology, remove the lesion, and delay malignancy and recurrence. Studies have shown that the degree of tumor resection is closely related to the prognosis, and the survival rate of patients whose tumors are completely resected is generally better than that of those who are partially resected. The prognosis of the tumor is also related to whether or not radiotherapy is administered. Some scholars have conducted studies showing that the 1-, 3-, and 5-year survival rates of postoperative simultaneous radiotherapy for adult grade II and grade III gliomas are better than that of postoperative radiotherapy alone, so postoperative simultaneous radiotherapy can improve the survival rate in general. In summary, there are many factors affecting how long a patient with grade 2 or 3 glioma can live. For patients with glioma, they should always pay attention to their own physical condition and hold a positive attitude to cooperate with doctors for treatment.