View clinical trials related to Recurrent High-Grade Gliomas.
Filter by:Brain imaging tests are routinely used to detect the presence of a brain tumor or to evaluate the response to treatment. Sometimes the images obtained are not specific and the only way to establish a diagnosis is by obtaining a tissue sample. The hypotheses of the study is to determine if multimodal MR technique will provide tissue signatures that differentiate between tumor progression and treatment related necrosis in high grade glioma patients.
Background: In vivo experiments have documented the ability of ZD6474 to inhibit tumor growth in various preclinical tumor models. Given the pronounced neovasculature associated with malignant gliomas, and abundant published data demonstrating the dependence of glioma growth on the maintenance and proliferation of this neovasculature, ZD6474 represents a potentially promising new therapeutic approach to these otherwise refractory tumors. Thus, we now propose a phase I trial of ZD6474 in patients with recurrent and progressive low-grade gliomas who are on P450-inducing anti-epileptic drugs and a phase II trial for patients with recurrent gliomas not taking P450-inducing anti-epileptic drugs. Objective: Phase I - To establish the maximally tolerated dose of ZD6474 and to obtain preliminary information regarding the spectrum of toxicities of ZD6474, and to obtain pharmacokinetic data to patients taking EIAED. Phase I - To obtain preliminary information regarding potential anti-tumor activity of ZD6474 in patients taking EIAED. Phase II - To establish data regarding the anti-tumor activity of ZD6474 and to collect information regarding the spectrum of toxicities in patients not taking EIAEDs. Eligibility: Patients with histologically proven malignant primary gliomas will be eligible for this protocol. Additionally, patients with progressive low-grade gliomas and patients with infiltrative brain stem gliomas, diagnosed radiographically rather than by biopsy will also be eligible. Design: Phase I - Group B patients will be accrued to the formal dose-escalation phase I trial. Groups of patients with recurrent high-grade gliomas will be accrued to increasingly higher doses of ZD6474 until the MTD is established. Phase II - Patients will be treated at a dose of 300 mg day, every day, on a 4-week cycle.
Background: Bevacizumab is a genetically engineered antibody that blocks the growth of new blood vessels in tumors. Inhibiting the formation of these blood vessels may slow or stop disease progression by diminishing the supply of life-sustaining nutrients and oxygen the blood delivers to the tumor. Bevacizumab is approved for treating colorectal cancer and has shown activity against brain tumor cells in laboratory and animal tests. Objectives: To examine the safety and side effects of bevacizumab in patients with recurrent brain tumors. To determine the anti-tumor activity of bevacizumab in patients with recurrent brain tumors. Eligibility: Patients 18 years of age and older with a brain tumor that continues to grow after receiving standard treatments. Design: Patients complete the following procedures during the study: - Infusions of bevacizumab through a vein once every 2 weeks in 4-week treatment cycles. - Positron emission tomography (PET) scan before the first dose of bevacizumab, at the end of the first treatment cycle, and as needed after that. - Magnetic resonance imaging (MRI) scan before the first dose of bevacizumab, within 48-96 hours after the first dose of bevacizumab in the first treatment cycle, and then every 4 weeks. One tube of blood for research is collected at the time of each MRI scan to look at specific cells. - Physical and neurological examinations every 2 weeks for the first treatment cycle and then every 4 weeks. - Quality-of-life questionnaires every 4 weeks.