Shapour Omidvari - Shiraz University of Medical Sciences, Shiraz, Iran
Hamid Nasrolahi - Shiraz University of Medical Sciences, Shiraz, Iran
Amir Abbas Kani - Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran
Niloofar Ahmadloo - Shiraz University of Medical Sciences, Shiraz, Iran
Ahmad Mosalaei - Shiraz Institute for Cancer Research, Shiraz University of Medical Sciences, Shiraz, Iran
Mohammad Mohammadianpanah - Shiraz University of Medical Sciences, Shiraz, Iran
Mansour Ansari - Shiraz University of Medical Sciences, Shiraz, Iran

The median overall survival in glioblastoma multiforme is usually less than one year. Long-term survival is rare and is seen in only ۳%-۶% of GBM patients. The present study reports the characteristics and treatment outcomes of six cases of glioblastoma multiforme with long-term survival. A literature review is also presented. Between ۱۹۹۰ and ۲۰۰۸, ۲۱۷ glioblastoma multiforme patients have been treated at our center of which six cases (four males) survived for three years or longer. The mean age of the six cases was ۲۵.۷ years. All patients received postoperative radiotherapy with a mean dose of ۵۵ gray and four patients received nitrosourea-based chemotherapy. Patients' mean survival was ۵.۲ years. The results of this study and review of the literature have indicated that long-term (more than three years) survival is exceptional and mainly observed in younger patients with good performance status and following complete surgical tumor resection.