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Study says standard treatments for early-stange breast cancer may not save lives

Researchers analyzed data on 100,000+ women over 20-year period

A new study in JAMA Oncology questions whether the treatment administered to tens of thousands of women who are diagnosed annually with ductal carcinoma in situ (DCIS), a very early-stage breast cancer, actually improves their outcomes.

DCIS—also called Stage Zero breast cancer—is a condition in which abnormal cells build up in the milk duct's lining. Diagnoses of DCIS have increased significantly over the past few decades, and now make up nearly 25% of all cancer diagnoses made via mammography. About 60,000 U.S. women are diagnosed with DCIS annually.

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