MammoSite is associated with radiation therapy for which cancer type?

• A. Lung cancer
• B. Breast cancer
• C. Prostate cancer
• D. Thyroid cancer

Answer: (B)

MammoSite is a brachytherapy system used for accelerated partial breast irradiation in breast cancer patients after lumpectomy. A catheter with a controllable radiation source is placed into the lumpectomy cavity, delivering a high dose of radiation directly to the surgical bed while sparing most of the surrounding breast tissue. This targeted approach shortens treatment time compared with traditional whole-breast irradiation and minimizes radiation exposure to nearby organs. Since this technique is specifically designed for breast tissue and breast cancer, it is not used for cancers of the lung, prostate, or thyroid.