Understanding Breast Cancer » Diagnosis
Screening refers to tests used to find a disease, such as cancer, when there are no symptoms. The goal of screening tests, such as mammograms, is to find cancers before they start to cause symptoms. Breast cancers that are found because they can be felt are usually larger and are more likely to have already spread beyond the breast. In contrast, breast cancers found during screening mammograms are more likely to be small and still confined to the breast. They require less treatment and are more likely to be curable.