ESTRO Multidisciplinary Management of Breast Cancer 2017

ECOG E5194 (PARENT STUDY)

Prospective multicenter study 1997-2000 (n = 670) cohort 1: low/intermediate grading, extent < 2.5 cm cohort 2: high grading, extent < 1 cm

Treatment

- Surgical excision - free margins at least 3 mm - no RT - Tamoxifen optional

Solin et al. JNCI 2013 2011; Abstract S4-6.