Tamoxifen in Treating Women With Breast Cancer

Summary

RATIONALE: Estrogen can stimulate the growth of breast cancer cells. Hormone therapy using tamoxifen may fight breast cancer by blocking the uptake of estrogen by the tumor cells. PURPOSE: Randomized phase III trial to compare the effectiveness of at least 2 years of tamoxifen with that of 5 additional years of tamoxifen in treating women who have breast cancer that has been surgically removed.

Timeline

Start

1991-05

Primary completion

—

Completion

—

Publications

• Background Gray R, Davies C, Perry P. Tamoxifen for early breast cancer: better late than never. Ann Oncol. 2000 May;11(5):505-7. doi: 10.1023/a:1008323116265. No abstract available.
• Background Rea D, Poole C, Gray R. Adjuvant tamoxifen: how long before we know how long? BMJ. 1998 May 16;316(7143):1518-9. doi: 10.1136/bmj.316.7143.1518. No abstract available.
• Background Earl H, Gray R, Kerr D, Lee M. The optimal duration of adjuvant tamoxifen treatment for breast cancer remains uncertain: randomize into aTTom. Clin Oncol (R Coll Radiol). 1997;9(3):141-3. doi: 10.1016/s0936-6555(97)80067-2. No abstract available.
• Background Earl H, Baker P, Kerr D, Lee M, Gray R, Baum M. Adjuvant treatment with tamoxifen. Recruitment into studies assessing optimum duration of treatment must continue. BMJ. 1996 Apr 20;312(7037):1036-7. doi: 10.1136/bmj.312.7037.1036b. No abstract available.
• Background Gray R. Tamoxifen: how boldly to go where no women have gone before. J Natl Cancer Inst. 1993 Sep 1;85(17):1358-60. doi: 10.1093/jnci/85.17.1358. No abstract available.
• Poterala JE, Wisinski KB. Abbreviated endocrine therapy duration for low estrogen receptor-positive breast cancer: The counter to extended endocrine therapy. Cancer. 2022 May 1;128(9):1724-1726. doi: 10.1002/cncr.34158. Epub 2022 Feb 25. No abstract available.
• Bartlett JMS, Sgroi DC, Treuner K, Zhang Y, Ahmed I, Piper T, Salunga R, Brachtel EF, Pirrie SJ, Schnabel CA, Rea DW. Breast Cancer Index and prediction of benefit from extended endocrine therapy in breast cancer patients treated in the Adjuvant Tamoxifen-To Offer More? (aTTom) trial. Ann Oncol. 2019 Nov 1;30(11):1776-1783. doi: 10.1093/annonc/mdz289.

Drugs

Indications