Breast cancer screening by mammography has proved to be the only means of reducing mortality from this disease by as much as 30-50% worldwide. However, despite the widespread utilization of screening mammography and the constantly growing number of examinations performed every day, the interpretation of mammograms remains largely subjective and is not even always clear. The current terminology is still far from standardized and is often even inappropriate. This is partly because of a lack of complete knowledge of mammographic signs and how to report them in clear, correct language. The core of this book consists of high-quality images that clearly demonstrate normal breast features and pathologic abnormalities, thus providing essential visual support for radiologists interpreting mammograms.