Clinical Trial Finder

Inclusion Criteria:

1. Written informed consent. 2. Age 18

• - 75 years.

3. Karnofsky Performance Score (KPS) of ≥60 % 4. Radiologically suspected diagnosis (according to RANO criteria) of the first recurrence of a glioblastoma located in the cerebral hemisphere including insular and diencephalon. Tumors in the brain stem are excluded. First MRI with signs of first recurrence (radiologic RANO criteria for disease progression) within 8 weeks prior to Informed Consent. Not necessarily identical to primary tumor location. 5. Single or single progressive contrast-enhancing lesion on MRI, largest diameter not more than 2.5 cm. 6. For female and male patients of reproductive potential: Willingness to apply highly effective contraception (Pearl index <1) during the entire study.

Exclusion Criteria:

1. Multifocal disease > 2 locations. 2. Patients with significant non-enhancing tumor portions. 3. Previous treatment of recurrence. 4. Other malignant disease except basalioma. 5. Hypersensitivity against porphyrins or Gliolan® or Fluorethylenpropylen (FEP ) 6. Porphyria. 7. HIV infection, active Hepatitis B or C infection. 8. Bone marrow reserve:

• - white blood cell (WBC) count <2000/μl, - platelets <100000/μl, 9.

Liver function:

• - total bilirubin > 1.5 times above upper limit of normal range (ULN) - alanine transaminase (ALT) and aspartate transaminase (AST) > 3 times ULN.

10. Renal function:

• - creatinine > 1.5 times ULN.

11. Blood clotting:

• - Quick/INR or PTT out of acceptable limits.

12. Conditions precluding MRI (e.g. pacemaker) 13. Past medical history of diseases with poor prognosis, e.g. severe coronary heart disease, heart failure (NYHA III/IV), severe poorly controlled diabetes, immune deficiency, residual deficits after stroke, severe mental retardation or other serious concomitant systemic disorders incompatible with the study (at the discretion of the investigator) 14. Any active infection (at the discretion of the investigator) 15. Any psychological, cognitive, familial, sociological or geographical condition that, in the investigator's opinion, compromises the patient's ability to understand the patient information, to give informed consent or to comply with the trial protocol. 16. Previous antiangiogenic treatment. 17. Participation in another interventional clinical trial during this trial or within 4 weeks before entry into this trial. 18. Pregnancy or breastfeeding

Arms

Experimental: Treatment arm

Stereotactic biopsy followed by stereotactical photodynamic therapy

Other: Control arm

Stereotactic biopsy

Interventions

Drug: - Stereotactic biopsy followed by stereotactical photodynamic therapy with 5-aminolevulinic acid

5-ALA HCl orally (20 mg/kg bw) 3,5-4,5 hours prior to induction of anaesthesia for stereotactic biopsy followed by stereotactical photodynamic therapy. All patients will receive further treatment of recurrent glioblastoma at the investigator´s discretion (best possible care).

Procedure: - Stereotactic biopsy

Stereotactic biopsy. All patients will receive further treatment of recurrent glioblastoma at the investigator´s discretion (best possible care).