RT Journal Article SR Electronic A1 Kuznar, Wayne T1 Tamoxifen in Estrogen Receptor-Positive Breast Cancer: 10 Years Superior to 5 Years JF MD Conference Express YR 2013 FD SAGE Publications VO 13 IS 6 SP 13 OP 14 DO 10.1177/155989771306007 UL http://mdc.sagepub.com/content/13/6/13.2.abstract AB Ten years of adjuvant tamoxifen is superior to 5 years in reducing the rates of late recurrence and death in women with estrogen receptor (ER)-positive breast cancer. Breast cancer mortality is reduced by about one third over 15 years when women with ER-positive tumors are treated with 5 years of adjuvant tamoxifen. The effect of an additional 5 years of treatment on breast cancer recurrence and death was examined in the randomized Phase 3 Adjuvant Tamoxifen: To Offer More? study [aTTom; ISRCTN17222211; Gray RG et al. J Clin Oncol 2013 (suppl; abstr 5)]