evidence: There's a troubling rise in breast cancer in women under the age of 50, but there are things you can do to help lower your risk. A recent American Cancer Society report found breast cancer rates in this age group have increased 1.4% every year from 2012 to 2021. Since 2000, Asian American and Pacific Islander women of any age have seen the largest uptick, with a 2.5% to 2.7% increase per year. CBS News chief medical correspondent Dr. Jon LaPook says a lot of this rise is in the kinds of breast cancer fueled by estrogen.