This study is for patients that have been diagnosed with non-germinomatous germ cell tumor (NGGCT). The goal of this study is to see if radiation therapy (RT) to the spine and a portion of the brain works just as well as the standard treatment, which includes RT to the whole brain and spine, for people with NGGCT who agree to take part in this study, and whose disease responds well to induction chemotherapy, or who have no signs of disease following surgery. Participants can expect to receive treatment on this study for about 6 to 11 months, depending on which therapy they receive. After study completion, participants will continue to be followed for up to 10 years.

This study is for newly diagnosed previously untreated neurofibromatosis type 1 (NF1) associated with low-grade glioma (LGG). The purpose of this study is to see if selumetinib works just as well as the standard treatment of carboplatin/vincristine (CV) for subjects with NF1-associated LGG, and to see if selumetinib is better than CV in improving vision in subjects with LGG of the optic pathway. Participants can expect to receive treatment for up to 24 months, until the cancer gets worse or until the side effects are too great. After study completion, participants will continue to be followed for up to 10 years.

This research study is enrolling participants that have been diagnosed with advanced gastric cancer (a disease in which cancer cells form in the lining of the stomach) or gastroesophageal junction cancer (a type of cancer forming in the area where the tube that connects the mouth and the stomach join together) and have not received prior treatment for advanced cancer and the tumor has already tested positive for fibroblast growth factor receptor 2b (FGFR2b) expression. FGFR2b is a protein that possibly causes cells to grow more quickly and multiply abnormally. The purpose of this study is to see if bemarituzumab is safe, tolerable, and effective when administered along with mFOLFOX6 (a combination of 5 fluorouracil [5 FU], oxaliplatin and leucovorin) and nivolumab and whether it causes any side effects. Bemarituzumab is not approved by the Food and Drug Administration (FDA). Participants will be pre-screening to see if they qualify to participate in Part 2. During the pre-screening portion, participants will provide either archived tissue or a fresh tumor sample in order to test for FGFR2b proteins. If the test results show an excessive amount of FGFR2b proteins in the tumor, participants may be asked to consider participating in the Part 2 study involving bemarituzumab, an investigational drug for people with advanced gastric or gastroesophageal junction cancer. Participants in this study will receive either bemarituzumab with mFOLFOX6 and nivolumab or placebo with mFOLFOX6 and nivolumab. The placebo will look like bemarituzumab but it will not contain active ingredients and has no effect on participants' condition. This study involves pharmacokinetic testing which is a blood test to determine how much study drug is in the blood. Bemarituzumab is not approved by the Food and Drug Administration (FDA). Participants could be in this study for up to 40 months and up to 57 visits.

This study is for newly diagnosed or previously untreated low-grade glioma (LGG). The overall goal of this study is to see if selumetinib works just as well as the standard treatment using carboplatin and vincristine (called CV) for subjects with LGG. Selumetinib is a drug that works by blocking a protein (a basic building block of the human body) that lets cancer cells grow without stopping. Participants can expect to receive treatment on this study for about 1–2 years. After study completion, participants will continue to be followed for up to 10 years.

This study is for participants that have been diagnosed with Medulloblastoma. The purpose of this study is to test the effectiveness of using an investigational agent called DFMO for Medulloblastoma. An investigational drug is one that has not been approved by the U.S. Food and Drug Administration (FDA). This study will look at the ability of this study drug to either keep participants tumor in remission or if they have active tumor, for their tumor to respond to the treatment and will also look at the safety and tolerability of DFMO. After this first day participants will be seen in clinic once every 30 days for the first 6 months of the study, after that they will be seen once every 90 days for the remainder of the study. These visits will last about 2 hours.

This study is for participants with tumors from pediatric cancers and genomic/molecular testing was done as part of standard of care treatment. This is an observational study; therefore, only information about the disease and medical treatment will be collected and participants will not receive any treatments or additional medications. The sponsor, Beat Childhood Cancer, will collect and store personal health information and molecular/genomic test results, tissue samples, and bodily fluids (examples: additional tube(s) of blood, urine, bone marrow or cerebral spinal fluid) that are left over after testing or treatment is completed in a data registry and a specimen bank, and make these available for future research. Database personnel will continue to collect and store participant information from future visits, as long as they do not withdraw from participation in this study.

This study is for subjects that have been diagnosed with cancer, as well as healthy research subjects. The purpose of this study is to evaluate the risk factors for development of immune related adverse side effects from cancer immunotherapy and to evaluate differences from healthy research subjects. Participation in the study will take about 2 visits over a period of 6 months.

This study is for patients who have cancer and are experiencing loss of weight and appetite. The study wants to find out if this taking olanzapine for four weeks will increase your appetite as compared to megestrol acetate. The study is looking to see if that approach is better or worse than the usual approach for your loss of appetite and weight. The usual approach is defined as care most people get for loss of appetite.

This study is for patients who have been diagnosed with small cell lung cancer (SCLC). The investigational drug in the study is AMG 757. Both drugs are immunotherapy treatments, medicines that work with your immune system to help fight cancer. AMG 757 will be given in a liquid form directly into participants' veins (intravenously). This study is being done to find out about the safety and efficacy (effects good or bad) of AMG 757 for the treatment of SCLC. Participants can expect to receive treatment for about 24 months.
The duration of AMG 757 treatment will depend on how the disease responds to the investigational drugs and how the body tolerates AMG 757. So, participation may be longer or shorter than this window. The study period includes screening period lasting up to 21 days, a treatment period, a first safety follow-up visit, and a second safety follow-up visit. This will be followed by long-term follow-up visits up to 1 year from the first dose of AMG 757 for a total of about 3 years in the study.

This study is for subjects that have been diagnosed with AML (acute myeloid leukemia) and MDS (myelodysplastic syndrome). This study is testing an "investigational" (not yet FDA approved) study drug called Sea-CD70. This study will find out if the drug is safe and tolerable, and find out the maximum tolerated dose (highest dose of a drug or treatment that does not cause unacceptable side effects) or recommended dose for the next phase of clinical study. The subject will be given the study drug in 28 day cycles. At any given visit, the subject may undergo procedures, such as a physical exam, blood samples, ECG (electrocardiogram), or a bone marrow exam. The subject may remain in the study for up to approximately 3 years.