Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the treatments for Breast Cancer ?
    ### Response:
    Radiation therapy uses high-energy x-rays or other types of radiation to kill cancer cells and shrink tumors. This therapy often follows a lumpectomy, and is sometimes used after mastectomy. During radiation therapy, a machine outside the body sends high-energy beams to kill the cancer cells that may still be present in the affected breast or in nearby lymph nodes.
    