This summary table contains detailed information about research studies. Summary tables offer an informative look at the science behind many breast cancer guidelines and recommendations. However, they should be viewed with some caution. In order to read and interpret research tables successfully, it is important to understand some key concepts. Learn how to read a research table.
Introduction: For women who have the option, lumpectomy (also called breast conserving surgery) plus radiation therapy is just as effective as mastectomy for treating early breast cancer.
Studies show there is no difference in overall survival between women treated with either method.
Learn about the strengths and weaknesses of different types of studies.
Study selection criteria: Randomized clinical trials with at least 150 participants and at least 10 years of follow-up, pooled analyses and meta-analyses.
Study Population(number of participants)
Stage ofBreast Cancer
Overall Survival(for length of follow-up)
Lumpectomyplus Radiation Therapy
Randomized clinical trials
NSABP B-06 
Danish Breast Cancer Cooperative Group 
Veronesi et al. 
National Cancer Institute 
Arriagada et al. 
Pooled and meta-analyses
Jatoi et al. 
van der Hage et al. 
NS = No statistically significant difference between the two groups
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