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. We retrospectively analyzed pre-, peri-, and postoperative data of these 55 women. Main reasons for omission of an IORT were insufficient tumor-skin distance (n = 20, 35.1%), an oversized wound cavity (n = 14, 24.6%), and a combination of both (n = 8, 14%). Further reasons (n = 12, 21.1%) were temporal shortage, unplanned maintenance work of the Intrabeam(®) device, unsuitable anatomicosurgical conditions, and ineligible histologic findings. Apart from suitable anatomic conditions, a precise preoperative ultrasonography as well as a strict interdisciplinary preoperative management is important for successful application of IORT.
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