Breast cancer is the most common cancer among women of all ages.
All women are at risk for breast cancer. The two most significant risk factors are being female and getting older. A woman's chance of getting breast cancer increases with age. An average woman's chance of getting breast cancer is about one in 235 by age 40, one in 25 by age 50 and 1 in 15 by age 80. In fact, half of all breast cancers in the United States occur in women 65 years and older.