Breast conservation therapy is now widely accepted as a treatment option for most women with early-stage invasive breast cancer and most patients with ductal carcinoma in situ. Despite its superior cosmetic outcome, breast conservation therapy is complex and requires a treatment regimen of six weeks of daily external-beam radiation therapy to the whole breast. This often proves prohibitive for the working woman, elderly patients, and those who live a significant distance from a radiation treatment center. In addition, with the more frequent use of adjuvant therapy, substantial delays can be incurred prior to the initiation of systemic chemotherapy if a conventional fractionated course of irradiation is given first, or in the delivery of locoregional radiotherapy if chemotherapy is delivered beforehand. Most of the logistical problems associated with breast conservation therapy relate to the protracted course of external-beam radiotherapy delivered to the whole breast.
Recently, accelerated partial breast irradiation for breast cancer patients with brachytherapy or external beam as the sole radiation modality following lumpectomy has shown promising results for select early-stage breast cancer patients. In this technique, the radiation dose is delivered within and surrounding the original tumor site over 4–5 days, instead of the traditional six weeks of external beam to the entire breast. Both high dose rate and low dose rate brachytherapy are discussed in this chapter, as well as external beam for accelerated partial breast irradiation.
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Das, R.K., Thomadsen, B. (2009). Physics of Accelerated Partial Breast Irradiation. In: Wazer, D.E., Arthur, D.W., Vicini, F.A. (eds) Accelerated Partial Breast Irradiation. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-88006-6_6
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