Other variables, including age of the patient at time of diagnosis, location and extent of surgical resection, postoperative performance status, histologic features of the tumor,
and use of adjuvant therapies
and early presentation with seizures, determine the prognosis for an individual patient. Overall, as many as three fourths of patients with nonanaplastic tumors can be expected to survive 5 years from the time of diagnosis, with a median reported survival duration of 6-10 years.