Retrospective Evaluation of Ultrasound-assisted Tumor Surgery in Breast-conserving Therapy

Retrospective Evaluation of the R1/ Post-resection Rate With Intraoperative Measurement of the Target Volume Using Ultrasound by a Surgeon (Ultrasound-assisted Tumor Surgery) as Part of Breast-conserving Therapy in Breast Cancer

The aim of this study is to evaluate whether standardizing intraoperative ultrasound (IOUS) with the "Tübingen Ultrasound Ruler" reduces R1 resection rates in breast-conserving surgery.

Inclusion Criteria:

• Age at least 18 years and no more than 80 years (inclusive)
• Preoperatively histologically confirmed breast cancer, detectable by ultrasound
• Unifocal to multifocal findings
• Palpable and/or non-palpable findings
• Indication for breast-conserving therapy (BCT)

Exclusion Criteria:

• Sonographically ambiguous findings
• Multicentricity
• Exclusion criteria for BCT
• Status after neoadjuvant chemotherapy