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Use of Sentinel Lymph Node Dissection After Neoadjuvant Chemotherapy in Patients with Node-Positive Breast Cancer at Diagnosis: Practice Patterns of American Society of Breast Surgeons Members.

BACKGROUND: The accuracy of sentinel lymph node dissection (SLND) in clinically node-positive patients who receive neoadjuvant chemotherapy has been investigated in clinical trials. This survey was designed to assess familiarity and impact of these trial findings into practice.

METHODS: American Society of Breast Surgeons members were invited by e-mail to complete an anonymous online survey. A total of 642 members responded (21% of 3090 eligible members). Results were summarized as proportions based on the number of responses to each question.

RESULTS: Respondents indicated knowledge of the Z1071 (86%), SENTINA (57%), and SN-FNAC (39%) trials. The published false negative rates (FNR) of the trials were correctly reported by 53% (336/638) of respondents. Before the trials, 45% (285/636) offered SLND compared with 85% (543/638) after the trials. In the 556 respondents who reported knowledge of at least one trial, 310 (56%) currently offer SLND to >50% of patients, 175 (31%) offer to <50%, and 70 (13%) routinely perform axillary lymph node dissection. Respondents who reported knowledge of the trials but did not change their practice to incorporate SLND (n = 67) cited concerns over lack of outcome data (64%), worries about FNR (42%), lack of resources (34%), or objections from radiation oncologists (25%), medical oncologists (18%), or other surgeons (8%).

CONCLUSIONS: The publication of trials evaluating SLND in clinically node-positive patients has resulted in changes in practice. Concerns over the FNR and lack of outcome data limit incorporation of SLND into practice by some surgeons.

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