Variation in radiotherapy after breast conserving surgery in patients aged 75 years or older between hospitals is not reflected in the locoregional recurrence risk

Observational cohort study in older women with early breast cancer: Use of radiation therapy and impact on health-related quality of life and mortality

“…In contrast, in lower risk patients, previous studies have demonstrated a low additional risk of ipsilateral breast recurrence (13,39) and no survival advantage up to 10 years follow up and breast preservation benefits with the omission of radiotherapy in the older age group. (12,40) In the PRIME II study cohort, at 10 years 93.4% of mortality was not due to BC.…”