The first was when the Nazis took Jews from their homes and dumped them in filthy ghettos. The second was, if they were still alive, putting them in concentration or extermination camps. The third was killing them, either gassing, shooting, or burning the Jews.
Breast cancer can rapidly spread to other parts of the body through the lymphatic system, and sometimes because of its proximity to the major body organs of the lung and heart. If left untreated, it will cause death, as it also may if not detected in the early stages before entering the lymphatic system.