Results from the NRG Oncology clinical study NRG-CC001 concluded that lowering radiotherapy dose to hippocampal stem cells improves cognitive and patient-reported outcomes for patients with brain metastases. These findings were presented at Plenary Sessions at the 2018 Society for Neuro-Oncology (SNO) and the 2019 American Academy of Neurology (AAN) Annual Meetings and are now published in the Journal of Clinical Oncology.