into the causes, prevention, and treatment of breast cancer
is under way in many medical centers throughout the world. Breast Cancer
(in women) contains more information on advances in treatment because almost
all breast cancer clinical trials and research are done in women. Researchers
have found that in many breast cancers, cells may break away from the tumor and
enter the blood. These circulating tumor cells can be detected with sensitive
lab tests. Although these tests are available for general use, it isn’t yet
clear how helpful they are.