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MammoSite: How It Works

MammoSite 5-Day Targeted Radiation Therapy simplifies radiation…

MammoSite Targeted Radiation Therapy:  Lumpectomy Diagram

1. Lumpectomy

The cancer and some adjacent normal breast tissue are removed and a cavity is created for a MammoSite Balloon Catheter. The Cavity Evaluation Device (CED) can be used to assess the lumpectomy cavity prior to MammoSite Balloon Catheter Implantation.

MammoSite Targeted Radiation: Breast Cancer Treatment

2. Placement

Uninflated MammoSite Balloon Catheter is inserted in the lumpectomy cavity. Placement is done either at time of lumpectomy or in a post-lumpectomy procedure in the office or in the hospital.

Reimbursement is available for post-lumpectomy placement.

MammoSite Targeted Radiation: Single Lumen Treatment

3A. Treatment with MammoSite single lumen

After the MammoSite Balloon Catheter is inflated with saline/contrast to position the tissue, the radiation source is advanced into the catheter and radiation therapy is delivered as directed by the treatment plan over 5 days, 2 treatments per day. After each treatment, the seed is removed. No radiation remains in the breast in between treatments.

View MammoSite Animation

3B. Treatment with MammoSite Multi-Lumen

After the MammoSite Balloon Catheter is inflated with saline/contrast to position the tissue, the radiation source is advanced into the catheter and radiation therapy is delivered as directed by the treatment plan over 5 days, 2 treatments per day.

After each treatment, the seed is removed. No radiation remains in the breast in between treatments.

MammoSite Multi-Lumen has Multiple offset lumens allow for dosimetric optimization. This provides coverage to target tissue while minimizing radiation dose to skin surface and chest wall.

This will allow the radiation oncologist to easily satisfy the current clinical recommendation that the dose to the skin and ribs be maintained to less than 125% of the prescription dose.23


View MammoSite Animation

After the final treatment, the MammoSite Balloon Catheter is easily removed.

Cavity Evaluation Device (CED)

The MammoSite CED is a simple 4–5 cm spherical single-lumen, silicone device. The CED may be used to assess the lumpectomy cavity and aid in the selection of the appropriate MammoSite RTS applicator. It may be used during surgery to assess skin spacing and conformance. The MammoSite CED may also be left in the lumpectomy cavity as a placeholder until it is exchanged for the MammoSite RTS applicator.

MammoSite Targeted Radiation: Cavity Evalutation Device

The above information provides an overview of MammoSite 5-Day Targeted Radiation Therapy. Refer to the Instructions For Use in the MammoSite Radiation Therapy System Instruction Manual for complete information regarding use of the device and all warnings, contraindications, and safety information.

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