Breast cancer ranks among the most prevalent cancers affecting women across the world and is the second leading cause of death in women in the United States. Although the rate of death from breast cancer has decreased over the years due to early detection and novel treatment options, about 240,000 new cases of breast cancer are still diagnosed in women yearly, and about 42,000 women die annually from breast cancer. Approximately one in eight women in the U.S. will develop breast cancer at some point in their lives, and about 30% of all new female cancers in a year are breast cancer.