Doctors at the Wilson Medical Center identified the stage 1 tumor during her mammogram.
"If you can put a mask on and go to Walmart, you can put a mask on and go get your mammogram done," Charlene Upshaw said.
Beyonce's father, Mathew Knowles, reveals he is a breast cancer survivor during a Good Morning America interview Wednesday.
A major doctors' group is changing its guidelines on when and how often women should get mammograms for breast cancer screening.
Mammograms do the most good later in life, a government task force has declared in recommending that women get one every other year starting at age 50.
Women should get a mammogram every two years starting at age 50 - and while routine screening brings little benefit in the 40s, beginning it that early should be a personal choice, a government task force said Monday.