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Chemotherapy before breast cancer surgery might fuel metastasis

hen breast cancer patients get chemotherapy before surgery to remove their tumor, it can make remaining malignant cells spread to distant sites, resulting in incurable metastatic cancer, scientists reported last week.

The main goal of pre-operative (neoadjuvant) chemotherapy for breast cancer is to shrink tumors so women can have a lumpectomy rather than a more invasive mastectomy. It was therefore initially used only on large tumors after being introduced about 25 years ago. But as fewer and fewer women were diagnosed with large breast tumors, pre-op chemo began to be used in patients with smaller cancers, too, in the hope that it would extend survival.

But pre-op chemo can, instead, promote metastasis, scientists concluded from experiments in lab mice and human tissue, published in Science Translational Medicine.

To read the full article, click HERE

Written by SHARON BEGLEY for statnews.com

(NATIONAL CANCER INSTITUTE/UNIV. OF CHICAGO COMPREHENSIVE CANCER CENTER)

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