Adherence to guidelines and benefit of adjuvant radiotherapy in patients with invasive breast cancer: results from a large population-based cohort study of a cancer registry

Purpose According to German S3 guidelines, radiotherapy (RT) is indicated in patients with invasive breast cancer after breast-conserving therapy (BCT). The aim of this analysis was to assess adherence to guidelines, long-term survival, recurrence rates, and recurrence-free survival after adjuvant RT in patients with BCT in daily clinical practice.