FSRT in Breast Cancer Patients With Brain Metastases

Brain metastasis accounted for 10-15% of all breast cancer patients and even higher in patients with triple negative and HER2 overexpressed subtype. Stereotactic radiation is the standard option for patients with 1-4 brain metastases. Among patients with 1-4 brain metastases, many studies suggest that stereotactic radiation results in fewer neurologic side effects than whole brain radiation. Also, several studies had demonstrated that 5-10 lesions had similar overall survival by using whole brain radiotherapy or stereotactic radiotherapy. Fractionated stereotactic radiotherapy(FSRT) is increasingly administered in the brain metastatic patients and retrospective studies had shown that FSRT had better local control and lower brain radiation necrosis than single fraction stereotactic radiation. Therefore, In this study, we explore to treat 1-10 brain metastasis lesion in breast cancer patients with FSRT.