RecruitingPhase 2Radiation therapyStereotactic Biopsy Split-Course Radiation Therapy in Diffuse Midline Glioma, SPORT-DMG StudyThis phase II trial studies the clinical outcomes of hypofractionated radiation therapy in patients with diffuse midline gliomas. This study aims to change the way radiation is delivered, from giving 6 weeks of radiation all at once to giving 2 weeks of radiation. This may determine if there is a difference in the outcome of the treatment, and most importantly, the patients' quality of life.