A new study suggests that women who are diagnosed with abnormal cells in the lining of a breast duct—a noninvasive condition called ductal carcinoma in situ, or DCIS—generally have a low risk of dying from breast cancer. In addition, treating these lesions may help prevent a recurrence in the breast but does not appear to decrease the already-low risk of dying from the disease, even after 20 years of follow-up.
The findings, Exit Disclaimer, from an observational study involving more than 100,000 women, were published August 20 in JAMA Oncology. Steven A. Narod, M.D., of the Women’s College Hospital, Toronto, and his colleagues used data from NCI’s Surveillance, Epidemiology and End Results (SEER) program to estimate the death rate from breast cancer among women diagnosed with DCIS.
National Cancer Institute