Intraoperative radiotherapy of early breast cancer using low-kilovoltage x-rays-reasons for omission of planned intraoperative irradiation.

The purpose of this study is to investigate reasons for omission of a planned intraoperative radiotherapy (IORT) during breast-conserving surgery (BCS). Between 2002 and 2009, in 297 women an IORT during BCS was planned. In 55 women this irradiation was finally not performed.