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Tamoxifen added to lumpectomy and radiation therapy reduced breast cancer events in ductal carcinoma in situ

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 QUESTION: In women with non-invasive ductal carcinoma in situ (DCIS), does adding tamoxifen to lumpectomy and radiation therapy (RT) prevent cancer in ipsilateral and contralateral breasts?

Design

Randomised {allocation concealed*}, blinded {clinicians, patients, outcome assessors, and statisticians*}, placebo controlled trial with median 74 month follow up.

Setting

57 centres in the United States and Canada.

Patients

1804 women who had lumpectomy for DCIS, including those with or without lobular carcinoma in situ, and who were expected to live ≥10 years. 16% had positive resection margins. Women with previously diagnosed cancer other than in situ carcinoma of the cervix or basal cell or squamous cell carcinoma of the skin were excluded. Follow up was 99.7%.

Intervention

Lumpectomy and RT (50 Gy) began …

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Footnotes

  • Sources of funding: National Institutes of Health; Department of Health and Human Services.

  • For correspondence: Prof B Fisher, National Surgical Adjuvant Breast and Bowel Project (NSABP), 4 Allegheny Center, Suite 602, Pittsburgh, PA 15212-5234, USA. Fax +1 412 330 4411.

  • * See glossary.

  • Information provided by author.