Neurocognitive Function After Proton Therapy in Children and Adolescents

This study is examining how proton therapy (a precise form of radiation) affects brain function in children and teenagers being treated for brain tumors. Researchers will track memory, attention, thinking, and learning over time to better understand and minimize the effects of radiation on developing brains. **You may be eligible if...** - You are between 8 and 18 years old - You have been diagnosed with a primary brain tumor - You have not previously had radiation to the brain - Your vision and hearing are not significantly impaired - You are able to complete repeated thinking and memory tests (about 1 hour each) - You are able to attend follow-up visits - A parent or guardian has provided written consent **You may NOT be eligible if...** - You have had prior brain radiation - You have significant vision or hearing impairment that would prevent testing - You are unable to attend required follow-up appointments Talk to your doctor to see if this trial is right for you.