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16.1 Collagen and Breast Cancer
16.1.1 Breast Cancer and Tissue Density
About one in eight women in the United States will develop invasive breast cancer in her lifetime, according to
data compiled by the American Cancer Society (http://www.cancer.org/cancer/breastcancer/overviewguide/
breast-cancer-overview-key-statistics). Although death rates from breast cancer have been decreasing since
1990, breast cancer is still the second leading cause of cancer deaths in American women aer lung cancer. In
2011, there were more than 2.6 million breast cancer survivors in the United States. Signicant risk factors for
breast cancer include family