Chemotherapy is indicated for which of the following cancer cases?

Chemotherapy is a systemic treatment that uses powerful medications to target and kill cancer cells throughout the body. It is typically indicated for advanced or aggressive cancers because these types of cancer have a higher likelihood of spreading beyond their original site, making localized treatments less effective. In cases of advanced or aggressive tumors, chemotherapy can help shrink the cancer, control its growth, and improve overall survival rates.

Localized basal cell carcinoma is usually treated with surgical options or topical therapies rather than chemotherapy because it often does not metastasize. Vocal cord cancer may be treated with radiation or surgery, and while chemotherapy could be considered in specific cases, it is not a standard first-line treatment. Ductal carcinoma in situ (DCIS) is a non-invasive condition, typically managed with surgery and possibly radiation, rather than chemotherapy, since it does not spread beyond the ducts of the breast. Thus, when considering the role of chemotherapy in cancer therapy, advanced or aggressive cancers are the clear and appropriate indication for its use.