Local Control, Quality of Life and Toxicities in Adults With Benign or Indolent Brain Tumors Undergoing Proton Radiation Therapy

This study is tracking tumor control, quality of life, and side effects in adults with brain tumors (including both benign and low-grade tumors) who are treated with proton radiation therapy — a highly precise type of radiation that delivers energy directly to the tumor while sparing nearby healthy brain tissue. **You may be eligible if...** - You are 18 or older with a brain tumor that requires radiation treatment (common types include low-grade glioma, pituitary adenoma, acoustic neuroma, and meningioma, among others) - You are recommended for proton radiation therapy by your medical team - You are in reasonable health (Karnofsky score of 60 or above) and have a life expectancy of at least 6 months - You can speak and understand English **You may NOT be eligible if...** - You have an uncontrolled active infection, heart problems, or a psychiatric condition that would affect your ability to follow the study - You are pregnant or breastfeeding - You have had another cancer within the last 3 years (with some exceptions for very early skin cancers) Talk to your doctor to see if this trial is right for you.