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Cancer Treatment Centers of America

MammoSite® Radiation Therapy System (RTS)

MammoSite® Radiation Therapy System (RTS) is a simpler, less invasive method of delivering breast brachytherapy, a site-specific radiation treatment completed in four to five days, as compared to seven weeks for traditional external beam radiation therapy.

The device delivers radiation directly to the area where a breast tumor has been surgically removed via lumpectomy, which is the site where tumors are most likely to recur. With its site-specific approach, MammoSite avoids external beam therapy side effects, such as the irradiation of healthy tissue.

Brachytherapy is the first breast cancer treatment to deliver radiation directly to the original tumor site and decrease radiation time. While standard breast brachytherapy involves surgically implanting up to 24 catheters into the breast, MammoSite calls for just a single catheter to perform the therapy.

MammoSite RTS consists of a balloon catheter that is inserted into the area of the breast where the tumor was removed. Once inserted, the balloon is expanded and radiation is delivered through a tiny bead attached to a wire, irradiating the area surrounding the cavity.

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