At the same time, the government added 14 substances to its carcinogen list, including tobacco smoke. Bi-Annual Report by the National Institute for Environmental Health Sciences. A recent study by scientists at Fred Hutchinson Cancer Research Center found a 2.6-fold higher incidence of lobular breast cancer in women who took the estrogen and progestin hormone therapy combination. The study focused on 537 women aged 50 or older who had breast cancer and 492 who did not. Currently, approximately 8.6 million U.S. women take the combination treatment, and 12 million take estrogen alone.
Lobular cancer occurs in the milk-producing lobules.
It accounts for 10 percent of breast cancer cases and is on the rise, having increased 35 percent between 1988 and 1995. Hormone replacement therapy in relation to risk of lobular and ductal breast carcinoma in middle-aged women. Dioxin comes from both natural and industrial sources, such as medical and municipal waste incinerators and paper plants. Dioxin enters the food chain when animals eat contaminated plants. When humans consume meat, dairy products, or fish, they ingest a highly concentrated load of dioxin, which has been linked to several cancers including lymphomas and lung cancer.