Bevacizumab in Recurrent Grade II and III Glioma

* Histologically proven grade II or grade III astrocytoma, oligodendroglioma or oligoastrocytoma according to the WHO 2007 at initial diagnosis. * Demonstrated absence of 1p/19q co-deletion according to local diagnosis. * Availability of biological material for central review processes and translational research projects * First recurrence after initial treatment with either radiotherapy and/or chemotherapy. * Enhancing recurrence on MRI scan. * For non operated patients, recurrent disease must be at least one bi-dimensionally measurable contrast-enhancing lesion with clearly defined margins by MRI scan, with minimal diameters of 10 mm, visible on 2 or more axial slices 5 mm apart, based on MRI scan done within two weeks prior to start of randomisation. * Stable or decreasing dosage of steroids for 7 days prior to the baseline MRI scan. * No more than one line of chemotherapy (concurrent and adjuvant temozolomide chemotherapy is considered one line of chemotherapy) * If given, chemotherapy must have consisted of either temozolomide or PCV, and patients must be off chemotherapy treatment for more than 6 months without progression. * No radiotherapy within the three months prior to the diagnosis of progression * No radiotherapy with a dose over 65 Gy, stereotactic radiosurgery or brachytherapy unless the recurrence is histologically proven * No current or recent (within 4 weeks before randomization) treatment with another investigational drug * No prior treatment with Bevacizumab or other VEGF inhibitors or VEGF-Receptor signaling inhibitors * No invasive procedures (surgical resection, open biopsy, significant traumatic injury or any other major surgery involving entry into a body cavity) within 4 weeks prior to randomization, or anticipation of the need for major surgery during the course of the study treatment. * No core biopsy (excluding intracranial biopsy) or other minor surgical procedure within 7 days prior to randomization. Placement of a central vascular access device (CVAD) if performed at least 2 days prior to bevacizumab administration is allowed. * Patient may have undergone surgery for recurrence. If operated, residual and measurable disease after surgery is not required but histology must have confirmed the recurrence. Craniotomy or intracranial biopsy site must be adequately healed free of drainage or cellulitis, and the underlying cranioplasty must appear intact at the time of randomisation. * No previous other malignancies, except for any previous malignancy which was treated with curative intent more than 5 years prior to randomisation, and except for adequately controlled limited basal cell carcinoma of the skin, squamous carcinoma of the skin or carcinoma in situ of the cervix * Absence of any cardiovascular disorder, including but not limited to: * No history of myocardial infarction, unstable angina within 6 months prior to randomisation * No "New York Heart Association" (NYHA) Grade II or greater congestive heart failure, or serious cardiac arrhythmia requiring medication. * No significant vascular disease (e.g. aortic aneurysm requiring surgical repair or recent peripheral arterial thrombosis) within 6 months prior to randomisation * No prior history of hypertensive crisis or hypertensive encephalopathy * No inadequately controlled hypertension (defined as systolic blood pressure \>150 mmHg and/or diastolic blood pressure \>100 m Hg) * Absence of any thrombotic or hemorrhagic event, including but not limited to: * No evidence of recent hemorrhage on MRI of the brain. However, patients with clinically asymptomatic presence of hemosiderin, resolving hemorrhagic changes related to surgery, and presence of punctate hemorrhage in the tumor are permitted entry into the study * No history or evidence of inherited bleeding diathesis or coagulopathy with the risk of bleeding. * No arterial or venous thrombosis ≤ 12 months prior to randomization * No history of stroke or TIAs within 6 months prior to randomization * No history of pulmonary haemorrhage/haemoptysis ≥ grade 2 according to the NCI-CTCAE version 4.0 criteria within 1 month prior to randomization * Absence of current or recent (within 10 days of first dose of Bevacizumab) use of aspirin (\> 325 mg/day) or other NSAID with anti-platelet activity or treatment with dipyramidole, ticlopidine, clopidogrel or cilostaz. * International normalized ratio (INR) \> 1.5 ULN and activated partial thromboplastin time (aPTT) \> 1.5 × the ULN. Patients using full-dose anticoagulants at baseline are excluded from the study; but prevention of thrombosis with low-dose anticoagulant is allowed * Absence of known hypersensitivity * to any part of the Bevacizumab or Temozolomide formulations. * to Chinese hamster ovary cell products or other recombinant human or humanized antibody. * No underlying or previous conditions that could interfere with treatment, including but not limited to: * No history of intracranial abscess within 6 months prior to randomisation * No clinically serious (as judged by the investigator) non-healing wounds, active skin ulcers or incompletely healed bone fracture. * No history of active gastroduodenal ulcer(s). * No history of abdominal fistula as well as non-GI fistula, gastrointestinal perforation or intraabdominal abscess within 6 months prior to inclusion. * No evidence of active infection requiring hospitalization or antibiotics, within 2 weeks prior to randomisation. * No other diseases, interfering with follow up. * Normal hematological functions: neutrophils ≥ 1.5 x 109 cells/l, platelets ≥100 x 109 cells/l and Hb ≥ 6.2 mmol/l (9.9 g/dl). * Normal liver function: bilirubin \< 1.5 x upper limit of the normal range (ULN), alkaline phosphatase and transaminases (ASAT) \< 2.5 x ULN, INR \< 1.5 ULN. * Normal renal function: calculated (Cockcroft-Gault) or measured creatinine clearance \> 30 mL/min; Urine dipstick for proteinuria \< 2+. Patients with ≥2+ proteinuria on dipstick urinalysis at baseline should undergo 24 hours urine collection and must demonstrate ≤1 g of protein/24 hr. * Age ≥ 18 years * WHO Performance status 0 - 2 * Women of childbearing potential (WOCBP) must be using an adequate method of contraception to avoid pregnancy throughout the study in such a manner that the risk of pregnancy is minimized. In general, the decision for appropriate methods to prevent pregnancy should be determined by discussions between the investigator and the study subject. WOCBP include any female who has experienced menarche and who has not undergone successful surgical sterilization (hysterectomy, bilateral tubal ligation, or bilateral oophorectomy) or is not postmenopausal. * Post menopause is defined as: amenorrhea ≥ 12 consecutive months without another cause or for women with irregular menstrual periods and on hormone replacement therapy (HRT), a documented serum follicle stimulating hormone (FSH) level \> 35 mIU/mL * Women who are using oral contraceptives, other hormonal contraceptives (vaginal products, skin patches, or implanted or injectable products), or mechanical products such as an intrauterine device or barrier methods (diaphragm, condoms, spermicides) to prevent pregnancy, or are practicing abstinence or where their partner is sterile (eg, vasectomy) should be considered to be of childbearing potential. * Women of child bearing potential must have a negative serum or urine pregnancy test (minimum sensitivity 25 IU/L or equivalent units of HCG) within 72 hours prior to the start of investigational product. * Female patients within one year of entering the menopause as well as males must agree to use an effective non-hormonal method of contraception during the treatment period and for at least 6 months after the last study treatment. * Female should not be breast feeding * Absence of any psychological, familial, sociological or geographical factors potentially hampering compliance with the study protocol and follow-up schedule; such conditions should be assessed with the patient before randomization in the trial. * Before patient randomization and study related procedures (that would not have been performed as part as standard care), written informed consent must be given according to ICH/GCP, and national/local regulations. Informed consent should also be given for biological material to be stored and used for future research on brain tumors. * All indicated timelines and absolute values requested by the eligibility criteria must be adhered to. However, a maximum of +/- 10% of the reference value for laboratory parameters and a maximum of +/- 2 days for timelines may be acceptable. Discussion with Headquarters and study coordinator is encouraged.