It could be genetic or environmental, or in most cases, a combination of the two. But most patients will never know exactly what caused their cancer. However, there are certain established risk factors that are associated with breast cancer.
Breast cancer is likely to be caused by many factors, and we don't know how the complex interactions between a person's genes, lifestyle and surrounding .
It is the second leading cause of cancer death in women, second only to lung. of the environmental and social factors, genetics and personal behavior results .
NIEHS-funded research has clearly shown that breast cancer is caused by a combination of genetic, hormonal, and environmental risk factors. But approximately 85% of breast cancers occur in women who have no family history of breast cancer, suggesting the importance of environmental factors.
Factors such as age, hormones produced in our bodies (such as estrogen) and. are considered to be personal or genetic factors rather than environmental factors.. To learn more about the role of the environment in breast cancer, Susan G.
About 5% to 10% of breast cancers are thought to be hereditary, caused by. or exposure to chemicals in the environment, are called somatic alterations.