US Breast Cancer Research Articles

US breast cancer study suggests risks from chemicals

A study by the New York State department of health suggests that post- menopausal women who lived near a chemical plant on Long Island between 1965 and 1985 were at increased risk of breast cancer. The study found that the risk for women living within one square kilometer of a chemical plant during that time was 60% greater than for women who lived elsewhere. This calculation took into account other known risk factors for the disease. Breast cancer support groups on Long Island have campaigned for years for research into environmental causes of the disease. The rate of breast cancer among women is 112 …

'Hormonal' risk factors, 'breast tissue age' and the age-incidence of breast cancer.

For most cancer sites there is a linear log-log relationship between incidence and age. This relationship does not hold for breast cancer, and certain 'key' breast cancer risk factors suggest that breast tissue does not 'age' in step with calendar time. A quantitative description of 'breast tissue age' is suggested which brings the age-incidence curve of breast cancer into line with the common log-log cancers and explains quantitatively the known key risk factors. The model also explains the 'anomalous' finding that although early first birth is protective, late first birth carries a higher risk than nulliparity. US breast cancer rates are some four to six times the rates in Japan--the model suggests that the key risk factors, when considered jointly with weight, can explain about 85% of the difference.