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Surgery, radiotherapy for early-stage breast cancer 'may not reduce mortality'

Stage 0 breast cancer, also known as ductal carcinoma in situ (DCIS), is the most common form of noninvasive breast cancer, accounting for around 20% of all breast cancer cases.

DCIS is diagnosed when cancer cells are identified in the milk ducts of the breast but have yet to spread to any surrounding tissue, meaning they are unable to metastasize outside the breast.

Some women diagnosed with DCIS will go on to develop invasive breast cancer and some will die from the disease, but at present, there is no way to determine which women will do so. As such, the majority of women with DCIS undergo breast-conserving surgery or mastectomy, usually followed by radiotherapy.

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Medical News Today

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