Manifestations of extramammary disease seen on imaging the breast

Involvement of the breast in disease processes not inherent to the breast can prove a diagnostic challenge. A variety of cases is presented of both common and uncommon conditions, some of which show unique mammographic features, while others have a wide and non-specific imaging differential diagnosis. The cases are grouped into four categories: calcifications in the breast; changes confined to the skin; masses in the breast; and generalized changes in the breast. Some conditions overlap into several of these categories.