MammoSite 5-Day Targeted Radiation Therapy

MammoSite® 5-Day Targeted Radiation Therapy is an advanced treatment option for some patients with early-stage breast cancer tumors that are three centimeters (about the size of a walnut) or smaller, with limited or no spread of cancer to the lymph nodes. This form of radiation therapy is administered following a lumpectomy. The radiation oncologist uses the MammoSite® Radiation Therapy System to place a radiation source into the cavity or space left when the tumor is removed. This delivers a higher dose of radiation directly to the area where cancer is most likely to recur.


The precision and higher dose of the radiation delivery means radiation can be administered for a shorter period of time than external beam radiation therapy. In fact, treatment with MammoSite Targeted Radiation Therapy is usually complete in just five days, compared with five to seven weeks with radiation therapy delivered for an external source. It is delivered on an outpatient basis, requiring no hospital stay, and with fewer treatment appointments, patients treated with MammoSite are able to return to their daily lives more quickly.

For more information about MammoSite 5-Day Targeted Radiation Therapy, talk to your doctor or visit