Prior radiation therapy (RT) after initial diagnosis will be allowed but there must be at least months from the completion of RT (or radiosurgery); prior chemotherapy and any systemic molecularly targeted anti-tumor therapy will be allowed, and there must be at least days from the last temodar chemotherapy, days for nitrosourea? at least days from the last dose for chemotherapy regimens given continuously or on a weekly basis with limited potential for delayed toxicity Currently receiving cancer therapy (chemotherapy, radiation therapy, immuno- therapy, biologic therapy, hormonal therapy, surgery, and/or tumour embolization).The following are allowed: Hydroxyurea for proliferative disease, Corticosteroids, Use of hematopoetic growth factors is permitted at the discretion of the investigator according to published guidelines (e.g., National Comprehensive Cancer Network (NCCN), American Society of Clinical Oncology (ASCO), American Society of Hematology (ASH), etc.). The following are NOT allowed: Investigational anti cancer drug within weeks prior to the first dose of GSK; Major surgery, radiotherapy, or immunotherapy within weeks of GSK Chemotherapy regimens with delayed toxicity within the last weeks. Chemotherapy regimens given continuously or on a weekly basis with limited potential for delayed toxicity within the last weeks. Nitrosourea or mitomycin C within the last weeks Any major surgery, radiotherapy, or immunotherapy within the last days (focal radiation does not require a washout period; ? weeks for WBRT). Chemotherapy regimens with delayed toxicity within the last weeks. Chemotherapy regimens given continuously or on a weekly basis with limited potential for delayed toxicity within the last weeks. Chemotherapy regimen given on every -week schedule within the last weeks. Chemotherapy given on the weekly basis with limited potential for delayed toxicity within the last weeks At least weeks from last chemotherapy or bevacizumab (Avastin) therapy ( weeks for nitrosourea or mitomycin C), or for chemotherapy regimens given continuously or on a weekly basis with limited potential for delayed toxicity, at least weeks from last dose. Any radiotherapy or immunotherapy within the last weeks (limited palliative radiation is allowed >= weeks); chemotherapy regimens with delayed toxicity within the last weeks (or within the last weeks for prior nitrosourea or mitomycin C); chemotherapy regimens given continuously or on a weekly basis with limited potential for delayed toxicity within the last weeks Any radiotherapy or immunotherapy within the last days (limited palliative radiation is allowed >= weeks); chemotherapy regimens with delayed toxicity within the last weeks; chemotherapy regimens given continuously or on a weekly basis with limited potential for delayed toxicity within the last weeks Received major surgery, radiotherapy, or immunotherapy within weeks of GSK administration. Chemotherapy regimens with delayed toxicity within the last four weeks (six weeks for prior nitrosourea or mitomycin C). Chemotherapy regimens given continuously or on a weekly basis with limited potential for delayed toxicity or palliative radiation to a limited area within the last two weeks. Received chemotherapy regimens with delayed toxicity within the last four weeks (six weeks for prior nitrosourea or mitomycin C). Received chemotherapy regimens given continuously or on a weekly basis with limited potential for delayed toxicity within the last two weeks. At least days must have elapsed for chemotherapy regimens, biologic, and targeted therapy given continuously or on a weekly basis with limited potential for delayed toxicity. Chemotherapy regimens within the last days (or within weeks for prior nitrosourea or mitomycin C). Chemotherapy regimens, biologic, and targeted therapy given continuously or on a weekly basis with limited potential for delayed toxicity within the last days. At least weeks from last chemotherapy or bevacizumab (Avastin) therapy ( weeks for nitrosourea or mitomycin C), or for chemotherapy regimes given continuously or on a weekly basis with limited potential for delayed toxicity, at least weeks from last dose. Chemotherapy regimens with delayed toxicity within the last weeks. Chemotherapy regimens given continuously or on a weekly basis with limited potential for delayed toxicity within the last weeks.