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Research needed to learn which DCIS patients may be candidates for less invasive therapy
Date:9/25/2009

Ductal carcinoma in situ (DCIS), the most common non-invasive lesion of the breast, presents unique challenges for patients and providers largely because the natural course of the untreated disease is not well understood. Because most women diagnosed with DCIS are treated, it is difficult to determine the comparative benefits of different treatment strategies versus active surveillance, meaning systematic followup. An independent panel convened by the NIH urged the scientific community to identify appropriate biomarkers and other prognostic factors to better predict the risk of developing breast cancer.

"Instead of treating all women diagnosed with DCIS, we need to determine which individuals are likely to develop invasive breast cancer and which will not," said Dr. Carmen Allegra, panel chair and Chief of Hematology and Oncology at the University of Florida. "If we could accurately predict this, we might save some women from undergoing unnecessary invasive treatments while achieving the same positive outcomes."

DCIS is a condition in which a spectrum of abnormal cells are found in the breast duct and have not spread outside the duct to other tissues in the breast. Since the advent of widespread screening mammography in the early to mid 1980's, rates of DCIS have increased sharply. It is estimated that more than one million U.S. women will be living with a prior diagnosis of DCIS by 2020.

Despite the connotations associated with the term carcinoma, DCIS is associated with ten-year survival rates close to 100% when treated with currently available therapies. These include breast-conserving surgery (local excision, with or without radiation), removal of the breast (mastectomy), and/or tamoxifen. It is important to stress that each of these treatment options has physical and emotional impacts to patients and should be weighed accordingly. The panel recognized that there are relatively few reliable data on the comparative effectiveness
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Contact: Lisa Ahramjian
AhramjianL@od.nih.gov
301-496-4999
NIH/National Institutes of Health, Office of Disease Prevention
Source:Eurekalert

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