National Cancer Institute National Cancer Institute
U.S. National Institutes of Health National Cancer Institute
Dictionary of Cancer Terms
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infiltrating breast cancer

 Cancer that has spread from where it started in the breast into surrounding, healthy tissue. Most infiltrating breast cancers start in the ducts (tubes that carry milk from the lobules to the nipple). Infiltrating breast cancer can spread to other parts of the body through the blood and lymph systems. Also called invasive breast cancer.

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