CHEMOTHERAPHY (Breast Cancer)

The purpose of chemotherapy and other systemic treatments is to get rid of any cancer cells that may have spread from where the cancer started to another part of the body. Chemotherapy uses these cytotoxic drugs to destroy cancer cells. The drugs work by disrupting the growth of cancer cells. As they circulate in the blood, they can reach them wherever they are in your body.The drugs ust kill cells that are actively growing and dividing into new cells. Cancer cells do this much more often than normal cells, so they are more likely to be killed by the treatment. Cancer cells are not as good at repairing themselves as normal cells. Normal cells can often repair any damage caused by chemotherapy.
It's also important to remember that organs in which the cells do not divide rapidly, such as the liver and kidneys, are rarely affected by chemotherapy. And doctors will keep close track of side effects and can treat most of them to improve the way you feel.

Source : www.cancerhelp.org , www.breastcancer.org