Rationale of the method of complex treatment for localized breast cancer with the use of methodology of intraoperative radiation therapy after neoadjuvant systemic drug therapy and sentinel lymph node biopsy

: Surgery remains the primary step in the localized forms of breast cancer. To date a growing number of women in the world could be provided with organ-preserving operations (OPO). At large tumor size in relation to the volume of the breast mastectomy is needed. Neoadjuvant therapy can allow a surgeon to perform OPO. However considering the original size of tumor and the knowledge that the greatest number of local recurrences of breast cancer occur within the bed of primary tumor it is logical to settle additional radiation dose to the bed in addition to the standard external beam radiotherapy. In patients with cN- prior neoadjuvant therapy it is possible to perform sentinel lymph node biopsy in order to improve functional results.