ive or are considered malign, the tumor grows at tremendous speeds, and may end up in metastasis. Metastasis is a complex process in which cells break away from their primary tumors, and via the blood supply or through the lymph system relocate into other organs, thus spreading cancer throughout the body. Generally, if a lump is smaller than one centimeter, it is considered benign, although every woman should consult her doctor about any unusual bumps or feeling in the chest. One sign of breast cancer results from ductal cancer in the breast. A once hollow open tube could be completely clogged up with cancerous cells leaving an awkward feeling in the chest area. Other complications that result from this cancer and others are the clogging and cramming of the system (American Cancer Society, 1999: 10). Recently genes have been named as a great cause of cancer. It now is thought in the medical community that while there are definite environmental contributors to cancer, even those people who are exposed to few carcinogens may suffer from disease that runs in their families. Among the genes that are being heavily researched is the gene BRCA1 (Case Studies). In one of the preliminary studies of this particular gene, over 250 Jewish women were discovered to have mutations in this germ-line allele, which is a version of the trait that is passed to the offspring through the germ line cell (or gamete). This accounts for approximately 13% of all breast cancer patients observed. Jewish women in specific were used, as early on there was a definite pattern of breast cancer through the Jewish community especially that which lived in the United States. The specific mutation, 185delAG, was, "strongly associated with the onset of breast cancer in Jewish women before the age of 30." Scientists advanced upon this new information of genealogical interplay, so the "New England Journal of Medicine" (NEJM) set out determined to study the overall effects of these genes. In an article printed on January 18, 1996, germ-line alterations in BRCA1 were discovered in six of the 80 women surveyed who had breast cancer but had no apparent familial history of it. Thus the scientists concluded that mutation was not limited to women with a history of cancer. Genes are thought to cause five to twenty percent of all breast cancers. A gene known as p53 supposedly stalls reproduction of cells, and can even cause a cell to "commit suicide". Other genes that seem to accelerate growth to overtake and stick to proteins include HER2, neu, and erB2 (Fitzgerald et al, 1996). The relation between serum estrogen levels at a single time is linked to breast cancer, but no evidence links estrogen levels over an extended time to the risk of breast cancer. This what was thought until researchers at the "New England Journal of Medicine" proposed a study. Bone mass is a cumulative effect of estrogen on bones scientists say, and so the study focused on the more easily observed density and mass of bone tissue in women. Four levels were studied, and the research was tallied. The risk for getting cancer in the lowest stage of bone mass was about 2%, and then 2.6, 2.7, and 7.0 in the second, third, and fourth levels of higher mass respectively. This research lent itself to the assumption that cumulative exposure to estrogen might play a part in breast cancer (Fitzgerald et al, 1996). Other hormonal factors have been viewed as potential breast-cancer-causing agents. Birth control pills are thought by some to lead to breast cancer. Early birth control pills used much more estrogen and progesterone than do today's pills. Lots of contradictory results were found in research on "the pill" because women who had been taking it for ten or twenty years had actually been taking several different types with possibly different levels of cancer causing hormones. But, in general, the report concluded that "the pill" doubled to up to quadrupled a woman's chance of having breast cancer (Fitzgerald et

Some topics in this essay:
Breast Cancer, Treatment Doctors, Journal Medicine, Statistics Breast, Cancer Institute, Cancer Prevention, Medicine NEJM, Cancer Society, , breast cancer, BRCA1 Studies, cancer cells, et al, fitzgerald et, fitzgerald et al, risk factors, september 20 1999, 20 1999, september 20, al 1996, et al 1996, cancer risk, factors breast cancer, risk factors breast, factors breast,