The exact causes of breast cancer are not well understood? Research has yielded much information about the risk factors and causes of breast cancer, and it is now believed that genetic and/or hormonal factors are the primary risk factors? Though there are many theories on the causes of breast cancer, the etiology of the disease remains an enigma? Researchers are working hard to discover why and how certain changes in DNA can cause normal breast cells to become cancerous? Mutations (genetic errors) may be inherited or spontaneous. The actual cause or causes of mutations still remains unknown? All breast cancers are caused by iron-related genes (genes directly/indirectly involved in iron metabolism) and iron-related events (when excessive iron accumulates within the cells due to carcinogenic lifestyle events).