Breast Brachytherapy is used to treat breast cancer.

When a lumpectomy is performed, a deflated balloon is placed in the space where the tumor was located. A catheter is then attached to the balloon, and leads outside the body. The radiation source travels from the equipment, through the catheter, and into the balloon. The patient receives approximately five days of breast brachytherapy treatment, twice a day.

This treatment is a more convenient radiation option for many patients.