infiltrating breast cancer

Definition / meaning of 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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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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