Key clinical point: Stereotactic ablative body radiotherapy (SABR) leads to long-term systemic disease control and survival in patients with oligometastatic breast cancer.
Major finding: The median follow-up was 50 months. Of the patients who progressed, 82% had new metastases and 18% experienced local failure. Median overall survival (OS) was 86 months, and progression-free survival (PFS) was 33 months. The receipt of SABR within 5 years of diagnosis ( P = .004) and presence of triple-negative breast cancer (TNBC; P = .013) were associated with worse OS. Advanced T stage ( P = .062) and TNBC ( P = .013) were associated with worse PFS.
Study details: A retrospective study of patients with metastatic breast cancer who received SABR between 2008 and 2018.
Disclosures: This study was supported by the National Institutes of Health/National Cancer Institute. The authors declared no conflicts of interest.
Source: Wijetunga NA et al. Cancer Med. 2021 Jun 22. doi: 10.1002/cam4.4068 .