Inclusion Criteria:
All of the following conditions must apply:
* Must be at least 18 years and less than 70 years of age.
* Must be ambulatory with a ECOG performance status 0 or 1
* Must have histologically confirmed glioblastoma IDH wild-type, with unmethylated MGMT-gene promotor, and a candidate for combined radiation therapy and chemotherapy ("Stupps Regimen").
* Must have accessible volume and quality of tumor tissue for vaccine production (proliferation of cells and extraction of tumor mRNA) at first surgery.
* Must have postoperative MRI after surgery with contrast enhancing tumor remnant of less than 1 cm3 or less than 10% of original tumor volume.
* Normal organ function defined by laboratory values as following: ANC \> 1.5 x 109/L; platelets \>100 x109/L, Hb \>9g/dL (\> 5.6 mmol/L). Creatinine \< 140 µmol/L (1.6 mg/dL); if borderline, the creatinine clearance \>40 mL/min, Bilirubin \< 20% above the upper limit of normal, ASAT and ALAT \< 2.5 the upper limit of normal. Albumin \>2.5 g/L.
* Serology indicating contagious HIV, HBV, HCV and Treponema pallidum must be negative.
* Signed informed consent and expected cooperation of the patients for the treatment and follow up must be obtained and documented according to ICH GCP, and national/local regulations.
Exclusion Criteria:
* Tumor in a localization where a modest increase in size due to reactive oedema may have a large impact on the patient's neurological condition, i.e. brain stem.
* History of prior malignancy other than glioblastoma, with the exception of curatively treated basal cell or squamous cell carcinoma of the skin and ca. cervicis stage IB.
* Active infection requiring antibiotic therapy.
* Significant cardiac or other medical illness that would limit activity or survival, such as severe congestive heart failure, unstable angina, or serious cardiac arrhythmia.
* Prior splenectomy.
* Glucocorticoid treatment not possible to terminate due to autoimmune disease or increased intracranial pressure.
* Adverse reactions to vaccines such as asthma, anaphylaxis or other serious reactions.
* History of immunodeficiency or autoimmune disease such as rheumatoid arthritis, systemic lupus erythematosus, scleroderma, polymyositis-dermatomyositis, juvenile onset insulin dependent diabetes, or a vasculitic syndrome.
* Chemotherapy or other potentially immune-suppressive therapy outside protocol that has been administered within the last 4 weeks prior to vaccination.
* Positive pregnancy test in women of childbearing potential (within 7 days before the first vaccination). Women of childbearing potential and sexually active male participants must use reliable methods of contraception during the whole treatment period and 3 months after the last trial drug dose. Reliable methods of contraception are defined in section .
* Any reason why, in the opinion of the investigator, the patient should not participate.
