Treatment results and outcome in elderly patients with glioblastoma multiforme--a retrospective single institution analysis.

•Extent of resection and adj. Radiochemotherapy are prognostic factors in elderly GBM patients.•Gross total resection shows lower morbidity than subtotal or partial resection, when indicated.•Adjuvant Temozolomide combined with irradiation are effective in prolonging overall survival.•In patients <65 years, age is less prognostic than treatment forms and Performance status.