408
Participants
Start Date
October 20, 2025
Primary Completion Date
May 31, 2033
Study Completion Date
January 31, 2040
Intensity-Modulated Radiation Therapy
Undergo IMRT/VMAT
Volume Modulated Arc Therapy
Undergo IMRT/VMAT
Pencil Beam Scanning
Undergo PBS
Intensity-Modulated Proton Therapy
Undergo IMPT
Temozolomide
Given PO
Vorasidenib
Given PO
Placebo Administration
Given PO
Biospecimen Collection
Undergo blood sample collection
Magnetic Resonance Imaging
Undergo MRI
Questionnaire Administration
Ancillary Studies
National Cancer Institute (NCI)
NIH
Alliance for Clinical Trials in Oncology
OTHER