One out of every eight women will be diagnosed with breast cancer in her lifetime. Five-year survival rates are good (85 to 99 percent) unless tumors have metastasized (25 percent). Death rates have dropped since 1989, but nowhere near enough.
You have a higher risk if you:
Are a woman 65 or older–have a relative, especially a mother, sister, or daughter, who had breast cancer–have mutations in genes (like BRCA1 and BRCA2) found in families with high rates of breast cancer–had menstrual periods that began before age 12 or menopause that began after 55–were older than 30 when you had your first child–never gave birth–took hormones after menopause–have dense breast tissue (seen on a mammogram)–have abnormal breast cells (atypical hyperplasia or carcinoma in situ)
Source: Nutrition Action Health Letter May 2015