Cristine S Velazco1, Nabil Wasif2, Barbara A Pockaj3, Richard J Gray4. 1. Division of Surgical Oncology, Department of Surgery, Mayo Clinic, Phoenix, AZ, USA. Electronic address: Velazco.cristine@mayo.edu. 2. Division of Surgical Oncology, Department of Surgery, Mayo Clinic, Phoenix, AZ, USA. Electronic address: wasif.nabil@mayo.edu. 3. Division of Surgical Oncology, Department of Surgery, Mayo Clinic, Phoenix, AZ, USA. Electronic address: Pockaj.barbara@mayo.edu. 4. Division of Surgical Oncology, Department of Surgery, Mayo Clinic, Phoenix, AZ, USA. Electronic address: gray.richard@mayo.edu.
Abstract
BACKGROUND: Radioactive seed localization (RSL) is an alternative to wire localization. We compared the rate of positive margins for evidence of a learning curve in implementing RSL. METHODS: A retrospective review of RSL by three surgeons at a single institution from 2002 to 2016. Positive margins were defined as ink on tumor. RESULTS: Surgeon experience with RSL for ranged from 142 to >500 cases. The positive margin rate among the first 100 of each surgeons' experience (n = 300) was 2.3% and the rate during the most recent up to 100 cases after experience with at least 100 RSL procedures (n = 242) was 4.1% (p = 0.32). Individual surgeon's positive margin rates ranged from 2 to 5% in the early experience and 2-7% in the later experience (p = NS). CONCLUSIONS: RSL for breast conservation surgery has a low rate of positive margins even early in a surgeon's experience. Implementation of RSL can be done with no evidence of a learning curve.
BACKGROUND: Radioactive seed localization (RSL) is an alternative to wire localization. We compared the rate of positive margins for evidence of a learning curve in implementing RSL. METHODS: A retrospective review of RSL by three surgeons at a single institution from 2002 to 2016. Positive margins were defined as ink on tumor. RESULTS: Surgeon experience with RSL for ranged from 142 to >500 cases. The positive margin rate among the first 100 of each surgeons' experience (n = 300) was 2.3% and the rate during the most recent up to 100 cases after experience with at least 100 RSL procedures (n = 242) was 4.1% (p = 0.32). Individual surgeon's positive margin rates ranged from 2 to 5% in the early experience and 2-7% in the later experience (p = NS). CONCLUSIONS:RSL for breast conservation surgery has a low rate of positive margins even early in a surgeon's experience. Implementation of RSL can be done with no evidence of a learning curve.
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