The inability of current breast screening methods to detect cellular changes at an early stage of development, as the Pap test does for cervical cancer, is one reason for the lack of significant reduction in the death rate of breast cancer. The HALO Breast Pap Test is a new test that can help to detect breast cancer in it's early stages. The HALO Breast Pap Test can detect abnormal cells years earlier than a mammogram can detect a lump. This test can help to identify younger women who are at risk for breast cancer.