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The University of Wisconsin Comprehensive Cancer Center researchers in a recent study suggests that high levels of cadmium in urine of women's risk of breast cancer occurrence is low urinary cadmium levels were more than twice that of this study suggested that cadmium exposure may lead to the risk factors of breast cancer, one study, published in today's issue of J Natl Cancer Inst magazine.

Statistics show that Western women for breast cancer the most common cancer and the highest first ten leading causes of death. Worldwide annual new cases of breast cancer diagnosed over one million, nearly 40 million people died of the disease. In Britain, breast cancer is the most common cancer, the average daily new confirmed cases over 100. It is Britain's third fatal cancer, each claimed 13,000 lives. In recent years, with a change in lifestyle, the incidence of breast cancer was significantly upward trend, breast cancer has become a serious threat to the health of women one of the common diseases, the mortality rate to 3% annual rate of growth. According to the latest epidemiological survey estimated that China's 2005 breast cancer incidence reach 168,000 people. The study found that Chinese breast cancer-prone than Europe and the United States the average age low 8 to 10 years old, and the ratio increased every year. How effective early detection and treatment of breast cancer has become scientists overcome long-standing commitment to the medical dilemma.

A large number of medical studies found that breast cancer is not caused by one single factor, the known risk factors for breast cancer include : age, had suffered from breast cancer, family history of breast cancer, had suffered from benign breast disease, the onset of menstruation before age 12, after 55 years of menopause, 30-year-old after the first times have never been pregnant or pregnancy, long-term use of estrogen replacement therapy and obesity after menopause. Increasing age is an important risk factor. About 60% of breast cancer occurred in 60 women over the age of 75 years after the greatest risk.

Cadmium is a heavy metal, cadmium and its compounds as food, water and air to enter the human body will have toxic effects. Cadmium is a major source of industrial emissions of cadmium - containing wastewater. These wastewater into the river bed, irrigation rice fields, plants absorb and accumulate in the rice, if long-term consumption of cadmium in rice, or drinking sewage containing cadmium, making it easy for chronic poisoning. The United States Environmental Protection Agency will already heavy metals such as cadmium "likely carcinogen," but in this study, with no one on the relationship between breast cancer research. If it will be more large-scale studies to repeat out of the study results, and confirmed that the carcinogenic effect of cadmium, will be introduced to help cadmium to the more stringent emission disposal. Researchers said that the high level of cadmium whether the incidence of breast cancer in which the role it plays, we still need further study.

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