What is chemotherapy used for in breast cancer treatment?

Chemotherapy is a critical component in the treatment of breast cancer, specifically designed to target and destroy cancer cells. This involves the use of cytotoxic drugs that specifically aim to inhibit the growth and division of rapidly proliferating cells, which is characteristic of cancerous tissues. This approach is essential, especially in cases where the cancer may have spread beyond the primary site or when there is a risk of recurrence after surgery.

The goal of chemotherapy in breast cancer is not only to eliminate existing cancer cells but also to reduce the size of tumors before surgery (neoadjuvant therapy) or to kill any remaining cells after surgery (adjuvant therapy). The mechanism behind these cytotoxic drugs often involves the disruption of DNA synthesis or the interference with cell division, ultimately leading to cell death.

Other options are not aligned with the fundamental purpose of chemotherapy in cancer treatment. Promoting tumor growth contradicts its intention, healing post-surgical wounds refers more to recovery processes unrelated to cancer treatment, and improving immunity does not specifically address the direct effects of chemotherapy on cancer cells.