Randomization DBCG PBI
Breast cancer, ≥60 yr,
breast conservation,
margin ≥2mm,
non-lobular type,
pT1, pN0, ER pos,
HER2 neg, grade 1-2
Whole breast RT 40 Gy / 15 fr
R
Partial breast RT 40 Gy / 15 fr
Stratum: institution, endocrine treatment
(~ASTRO consensus)