Radiotherapy after breast-conserving surgery for early breast cancer substantially reduced the risk of disease recurrence, yet the benefit did not translate to an improvement in overall survival (OS) at 30 years, a long-term analysis of the Scottish breast conservation trial showed.
Compared with no radiotherapy, adjuvant locoregional radiotherapy reduced the risk of ipsilateral breast tumor recurrence (IBTR) by 61% (HR 0.39, 95% CI 0.27-0.55, P