Gliomas constitute approximately 70% of primary malignant brain tumors in adults. Of these, glioblastoma multiforme is the most prevalent and lethal. Diagnosis is often late, when patients already suffer neurological symptoms. The diagnosis is obtained by a combination of scans and microscopic histological analysis of biopsy materialii. After diagnosis, patients have, on average, only 1 ½ years left to live. This poor life expectancy is all the more discouraging because patients are aggressively treated with a combination of surgery, radiation and chemotherapy with concomitant side-effects. This establishes a clear need for improved therapy.