Here are the statistics on breast cancer and biopsy in 2012, as found in BasicMedicalKey.com by Darryl Carter, 5th ed.:
In 2012 in the United States, there were 230,000 new cases of breast cancer, 99% of them in women, with nearly 40,000 disease-specific deaths (1). A much larger number of lesions were detected on clinical and radiographic breast examinations, and many of these were sufficiently suspicious of cancer to result in a biopsy. Ultimately, it is the responsibility of the pathologist to distinguish those of the biopsied lesions, which require additional attention or treatment from those which do not. In addition, the pathologist must integrate and disseminate an increasingly complex set of pathology-derived data to radiologists, surgeons, and medical and radiation oncologists to achieve optimal clinical results.
Apparently, calcifications are often seen in mammograms and are often an indicator of cancer cells. This paragraph describes core needle biopsy and fine needle biopsy.