This study is for patients that have been diagnosed with metastatic or locally advanced unresectable solid tumors with tumor protein 53 (TP53) mutation/loss with or without brain metastasis. This study is testing an investigational drug called AO-252. "Investigational" means it has not been approved by the United States Food and Drug Administration (FDA). The primary purpose of this study is to determine the maximum tolerated dose (MTD), the recommended phase II does (RP2D), and the safety profile of AO-252. The drug is given to participants orally. Participants can expect to be on this study for approximately 24 months, followed by a 12-month follow-up period.

Cancer caregivers in emerging and young adulthood (ages 18-35) are an underresearched and unsupported group of caregivers, and yet they are not uncommon. To address this critical support gap, the goal of this study is to develop and pilot test a caregiving support intervention specifically tailored for emerging and young adults caring for a parent with cancer. This phase of the study is intended to capture feedback on the intervention via focus groups with emerging and young adult caregivers of a parent with cancer.

This study is for adult patients with large brain metastases. The purpose of this study is to compare two different radiation therapy dose treatments: staged stereotactic radiosurgery (SSRS) and fractionated stereotactic radiotherapy (FSRT). Both treatment options are currently used as standard of care. Participation in this study will include standard of care visits along with questionnaires completed for research purposes.

This study is for patients that have been diagnosed with relapsed/refractory neuroblastoma. The investigational drug given is eflornithine (DFMO) along with etoposide. DFMO is the investigational drug being used along with etoposide for treatment of neuroblastoma. Participants will undergo a number of standard tests and research-related procedures before being able to enroll in this study. Some risks include but are not limited to: fewer red and white blood cells, diarrhea, abdominal pain, loss of appetite, skin rash, seizure, difficulty swallowing and blurred vision. Participants can expect to be on this study for approximately 2 years. Participants will then be followed for up to 5 years after study completion.

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 patients who have been diagnosed with a neuroblastoma (NBL). The purpose of this study is to find out if we can improve the treatment for subjects with high-risk NBL by adding the experimental drug 131I-MIBG or the experimental drug Crizotinib to recommended therapy. The secondary purpose is to find out if we can reduce the number of stem cell transplants from two to one if we give the experimental drug 131I-MIBG during Induction, and use different drugs as part of the transplant chemotherapy given prior to stem cell infusion during Consolidation. Participants can expect to be in this study for up to 2 years. Researchers would like to continue to follow participants health for up to 10 years.