View clinical trials related to PNET.
Filter by:This study is a clinical trial to determine the safety of injecting G207 (a new experimental virus therapy) into a recurrent or progressive brain tumor. The safety of combining G207 with a single low dose of radiation, designed to enhance virus replication and tumor cell killing, will also be tested.
This study will analyze the effects of radiation given to children who have tumors of the central nervous system (CNS). Researchers want to learn more about changes in the quality of life that patients may experience as a result of radiation. Patients ages 21 and younger who have a primary CNS tumor and who have not received radiation previously may be eligible for this study. They will have a medical history and physical examination. Collection of blood (about 2-1/2 tablespoons) and urine will be done, as well as a pregnancy test. Patients will complete neuropsychological tests, which provide information about their changes in functioning over time. An expert in psychology will give a number of tests, and the patient's parents or guardian will be asked to complete a questionnaire about the patient's behavior. Also, patients will be given a quality of life questionnaire to complete and vision and hearing tests. The radiation itself is prescribed by patients' doctors and is not part of this study. Magnetic resonance imaging (MRI) will give researchers information about the tumor and brain, through several scanning sequences . MRI uses a strong magnetic field and radio waves to obtain images of body organs and tissues. Patients will lie on a table that slides into the enclosed tunnel of the scanner. They will need to lie still, and medication may be given to help them to do that. They may be in the scanner for up to 2 hours. As the scanner takes pictures, patients will hear knocking or beeping sounds, and they will wear earplugs to reduce the noise. A contrast agent will be administered, to allow images be seen more clearly. Blood and urine tests will be conducted after the first dose of radiation. MRI scans will be done 2 weeks after patients finish radiation therapy and again at 6 to 8 weeks, 6 months, 12 months, and yearly. Also at those follow-up periods, patients will undergo similar procedures as previously, including blood and urine tests and neuropsychological testing. Patients can remain in this study for 5 years.
Background: - An experimental drug called ABT-888 has been studied in combination with temozolomide (a type of chemotherapy) in adults who have certain kinds of cancer. ABT-88 has been shown to increase tumor sensitivity to temozolomide and improve treatment outcomes in people who have cancer. More research is needed to determine if this combination of drugs will work well as an effective treatment for children who have brain tumors. This will be the first time this combination has been studied in pediatric patients. Objectives: - To determine the maximum doses of ABT-888 and temozolomide when given in combination in children with brain tumors. - To learn how children metabolize and clear ABT-888 from their bodies so that appropriate doses of this medication can be recommended for future clinical trials of this drug. - To learn what side effects may occur when ABT-888 and temozolomide are given together. - To learn how certain tumors respond to this combination of drugs by studying the characteristics of these tumors in a laboratory. Eligibility: - Individuals less than 21 years of age who have been diagnosed with a cancer of the nervous system (including brain and brain stem tumors) that has not responded to standard therapy. Design: - Before beginning the study, participants will have a full medical history and physical examination, and may also be required to have scans of the brain and spine or provide samples of cerebrospinal fluid. - Treatment will consist of up to 13 28-day cycles of therapy, for a total of 52 weeks (1 year). Participants will receive a dose of ABT-888 twice daily for 5 days, and will receive a dose of temozolomide once daily for 5 days, every 28 days. The morning dose of ABT-888 will be given 60-90 minutes before the dose of temozolomide. - Participants will have routine blood tests at least once a week throughout the treatment cycles, and will have scans of the brain and spine performed as required by the researchers.