This phase II trial studies how well vismodegib and focal adhesion kinase (FAK) inhibitor GSK2256098 work in treating patients with meningioma that is growing, spreading, or getting worse. Vismodegib and FAK inhibitor GSK2256098 may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth.

This phase II trial studies how well genetic testing works in guiding treatment for patients with solid tumors that have spread to the brain. Several genes have been found to be altered or mutated in brain metastases such as NTRK, ROS1, CDK or PI3K. Medications that target these genes such as abemaciclib, GDC-0084, and entrectinib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Genetic testing may help doctors tailor treatment for each mutation

This phase II trial studies 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).

This phase III trial studies stereotactic radiosurgery to see how well it works compared to hippocampus avoidance whole-brain radiation therapy with memantine in treating patients with 5-15 brain tumors that have spread from other places in the body. 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. Hippocampus avoidance whole-brain radiation therapy delivers radiation to the entire brain except for the hippocampus. The hippocampus is a brain structure that is important for memory. Hippocampus avoidance during whole-brain radiation therapy decreases the amount of radiation that is delivered to this area. Memantine is often given with whole brain radiation therapy and may decrease the risk of cognitive side effects after radiation therapy to the brain. It is not yet known whether stereotactic radiosurgery or whole-brain radiation therapy works better in treating patients with 5-15 brain metastases.

This randomized phase III trial studies how well radiation therapy works compared with observation in treating patients with newly diagnosed grade II meningioma that has been completely removed by surgery. Radiation therapy uses high energy x-rays to kill tumor cells and shrink tumors.

This phase III trial compares the effect of adding lomustine to temozolomide and radiation therapy versus temozolomide and radiation therapy alone in shrinking or stabilizing newly diagnosed MGMT methylated glioblastoma. Chemotherapy drugs, such as lomustine and temozolomide, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Radiation therapy uses high energy photons to kill tumor cells and shrink tumors. Adding lomustine to usual treatment of temozolomide and radiation therapy may help shrink and stabilize glioblastoma.

This phase III trial compares the addition of stereotactic radiosurgery before or after surgery in treating patients with cancer that has spread to the brain (brain metastases). Stereotactic radiosurgery is a type of radiation therapy that delivers a high dose of radiation only to the small areas of cancer in the brain and avoids the surrounding normal brain tissue. Surgery and radiation may stop the tumor from growing for a few months or longer and may reduce symptoms of brain metastases.