Why Cancer is Gaining on Us
FOR ALL the pink ribbons, breast-cancer awareness events, fund-raisers, and celebrations of "survivorship," the facts remain grim. In this country, a woman's lifetime risk of breast cancer is one in eight. In 1975, the risk was about one in 11.
Outside of skin cancer, breast cancer is the most frequently diagnosed cancer in women. It is estimated that in 2008 there will be 250,230 new cases of breast cancer among women. An estimated 41,000 women will die of metastatic breast cancer in 2008. Because we still do not know what the causes of breast cancer are, primary prevention remains an elusive goal while mammography and early detection are the focus of attention.
Since World War II, the proliferation of synthetic chemicals has gone hand-in-hand with the increased incidence of breast cancer. About 80,000 synthetic chemicals are used today in the United States, and their number increases by about 1,000 each year. Only about 7 percent of them have been screened for their health effects. These chemicals can persist in the environment and accumulate in our bodies. According to a recent review by the Silent Spring Institute in Newton, 216 chemicals and radiation sources cause breast cancer in animals.
Nearly all of the chemicals cause mutations, and most cause tumors in multiple organs and animal species, findings that are generally believed to indicate they likely cause cancer in humans. Yet few have been closely studied by regulatory bodies. There is concern about benzene, which is in gasoline; polycyclic aromatic hydrocarbons, which are in air pollution from vehicle exhaust, tobacco smoke, and charred foods; ethylene oxide, which is widely used in medical settings; and methylene chloride, a common solvent in paint strippers and glues.
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