Clinical Trials Below are current clinical trials.132 studies in Neurology and Neurosurgery (open studies only). Filter this list of studies by location, status and more. Image-based Mapping of Brain Tumors Scottsdale/Phoenix, Ariz., Rochester, Minn. The purpose of this study is to combine MRI images with histologic and genetic analysis of cancer (from blood and tissue samples) to improve the overall accuracy of diagnosis and effectiveness of cancer treatment. A Study Testing the Effect of Immunotherapy (Ipilimumab and Nivolumab) in Patients with Recurrent Glioblastoma with Elevated Mutational Burden Jacksonville, Fla., Rochester, Minn., La Crosse, Wis., Scottsdale/Phoenix, Ariz., Eau Claire, Wis. The purpose of this study is to evaluate the effect of immunotherapy drugs (ipilimumab and nivolumab) in treating patients with glioblastoma that has come back (recurrent) and carries a high number of mutations. Cancer is caused by changes (mutations) to genes that control the way cells function. Tumors with high number of mutations may respond well to immunotherapy. Immunotherapy with monoclonal antibodies such as ipilimumab and nivolumab may help the body's immune system attack the cancer and may interfere with the ability of tumor cells to grow and spread. Giving ipilimumab and nivolumab may lower the chance of recurrent glioblastoma with high number of mutations from growing or spreading compared to usual care (surgery or chemotherapy). Study of Tirabrutinib (ONO-4059) in Patients With Primary Central Nervous System Lymphoma (PROSPECT Study) Jacksonville, Fla., Scottsdale/Phoenix, Ariz. The purose of this study is to evaluate the effiectiveness, safety, and pharmacokinetics of tirabrutinib monotherapy in patients with relapsed or refractory Primary Central Nervous System Lymphoma PCNSL (Part A), and tirabrutinib in combination with one of two different high dose methotrexate based regimens (methotrexate/ temozolimide/rituximab or rituximab/methotrexate/procarbazine/ vincristine) as first line therapy in patients with newly diagnosed, treatment naïve PCNSL (Part B). Mayo Clinic is only participatin gin Part B, and only in the MTR regimen. Metastatic Tumor Research and Outcomes Network Rochester, Minn. The registry aims to collect patient information such as patient demographics, co-morbidities, clinical, diagnostic, and therapeutic data, as well as information on adverse events and HRQOL outcomes specific for patients with metastatic spine tumor(s). Electrophysiological Biomarkers for Parkinson's Disease Scottsdale/Phoenix, Ariz. This study will determine the validity of predictive and surrogate biomarkers for the detection of Parkinson's disease and Parkinson's disease cognitive decline. Brain Health and Dementia Prevention Registry Jacksonville, Fla. The purpose of this study is to create a registry of patients having a clinical diagnosis and collect demographics, cognitive testing, blood and cerebrospinal fluid so that biomarkers and genetic difference can be found in different patient groups. A Study to Develop Liquid Biopsy for Pediatric Brain Tumor Patients Rochester, Minn. The purpose of this study is to confirm detection of the H3K27M mutation in patient biofluids (CSF, blood, urine, saliva) and uncover the molecular histone (alkaline protein) profile of H3K trimethylation and H3S phosphorylation in the circulating nucleosomes isolated from the biofluids of patients with H3K27M tumors. Inherited Muscle Diseases Repository Rochester, Minn. To establish a repository of DNA samples collected prospectively from patients with inherited myopathies of unknown molecular and/or biochemical defect. To access residual muscle specimens from diagnostic muscle biopsies obtained as part of the routine medical care. The biospecimens will be used to better understanding the underlying molecular defects and mechanisms of muscle diseases. A Study of Nivolumab and Multi-fraction Stereotactic Radiosurgery with or without Ipilimumab in Treating Participants with Recurrent Grade II-III Meningioma Rochester, Minn., Jacksonville, Fla., Scottsdale/Phoenix, Ariz. The purpose of this study is to evaluate the side effects and best dose of nivolumab when given together with multi-fraction stereotactic radiosurgery and to see how well they work with or without ipilimumab in treating participants with grade II-III meningioma that has come back. Monoclonal antibodies, such as nivolumab and ipilimumab, may interfere with the ability of tumor cells to grow and spread. Stereotactic radiosurgery is a specialized radiation therapy that delivers a single, high dose of radiation directly to the tumor and may cause less damage to normal tissue. It is not yet known whether giving nivolumab and multi-fraction stereotactic radiosurgery with or without ipilimumab may work better in treating participants with grade II-III meningioma. A Registry Called Every Child for Collecting Data and Biology Specimens on Younger Patients with Cancer Rochester, Minn. The purpose of this registry called Every Child, is to collect data and biospecimens from multiple body sources for younger patients with cancer over time. Gathering health information over time from younger patients with cancer may help doctors find better methods of treatment and on-going care. 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