Unfortunately, the prognosis for a patient diagnosed with a malignant brain tumor is not very good. The length of survival varies, depending on the type and size of the tumor, as well as the patient's age and overall health.
Most brain tumors are classified as either low-grade (slow growing) or high-grade (fast growing). Low-grade tumors can often be managed with surgery, radiation therapy, and/or chemotherapy, while high-grade tumors may require more aggressive treatment. In most cases, high-grade tumors will not respond to treatment, and will eventually progress and grow.
In general, the survival rate for patients with a malignant brain tumor is usually less than one year. However, some patients may live longer than this, depending on the particular type of tumor and the effectiveness of treatment. For example, some low-grade tumors can be successfully treated and managed for several years. In some cases, patients may even achieve remission.
Overall, the length of time that a person can live with a malignant brain tumor will depend on the type and size of the tumor, as well as the patient's age and overall health. While the survival rate is usually low, some patients may experience longer-term survival with proper treatment.