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RATIONALE: Estrogen can stimulate the growth of breast cancer cells. Hormone therapy using either tamoxifen or anastrozole may fight breast cancer by blocking the use of estrogen. It is not yet known whether tamoxifen is more effective than anastrozole in preventing breast cancer after surgery for ductal carcinoma in situ.
PURPOSE: This randomized phase III trial is studying how well adjuvant tamoxifen works compared to anastrozole in treating postmenopausal women who have undergone surgery to remove ductal carcinoma in situ.
- Compare the efficacy of adjuvant tamoxifen vs anastrozole, in terms of local control and prevention of contralateral disease, in postmenopausal women with locally excised ductal carcinoma in situ.
- Compare side effect profiles of these drugs in these patients.
- Compare the efficacy of these drugs, according to the receptor status of the primary or recurrent cancer in these patients.
- Compare the rate of breast cancer recurrence and growth of new contralateral tumors after cessation of treatment with these drugs in these patients.
- Compare breast cancer mortality in patients treated with these drugs.
- Compare the effect of these drugs on other cancers, cardiovascular disease, fracture rates, and non-breast cancer deaths in these patients.
- Compare the tolerability and acceptability of side effects experienced by patients treated with these drugs.
OUTLINE: This is a randomized, double-blind, multicenter study. Patients are stratified according to participating center. Patients are randomized to 1 of 2 treatment arms.
- Arm I: Patients receive oral tamoxifen and oral placebo once daily.
- Arm II: Patients receive oral anastrozole and oral placebo once daily. In both arms, treatment continues for 5 years in the absence of disease recurrence or unacceptable toxicity.
Patients are followed annually for 5 years.
Peer Reviewed and Funded or Endorsed by Cancer Research UK
PROJECTED ACCRUAL: A total of 4,000 patients will be accrued for this study within 4 years.
Allocation: Randomized, Control: Active Control, Masking: Double-Blind, Primary Purpose: Treatment
anastrozole, tamoxifen citrate, adjuvant therapy
Institut Sainte Catherine
National Cancer Institute (NCI)
Published on BioPortfolio: 2014-08-27T03:54:46-0400
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Combined chemotherapy and radiotherapy given to augment some other form of treatment such as surgery. It is commonly used in the therapy of cancer.
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