@elizm - I also had no family history of breast cancer- or any cancer. I was also physically fit, had a good diet. Only risk factors I can think of was living close to a golf course in the 70s- while they still used dangerous toxins on the grass. Many women living in same area developed breast cancer and men other cancers. It was still not thought to be a hot spot. I also worked many years in a building where same happened. I worked there when I was diagnosed. Department of Health investigated- nothing.