• Akiko Matsumoto, Hiromitsu Jinno, Tetsuya Nakamura, Junichi Saito, Maiko Takahashi, Tetsu Hayashida, Kaori Kameyama, and Yuko Kitagawa.
• Department of Surgery, Inagi Municipal Hospital, 1171 Ohmaru, Inagi, Tokyo, 206-0801, Japan.
• Int J Surg. 2015 Oct 1; 22: 28-31.

IntroductionThe role of sentinel lymph node biopsy (SLNB) in patients with ipsilateral breast tumor recurrence (IBTR) remains to be elucidated. The aim of this study was to evaluate feasibility and validity of SLNB in patients with IBTR.MethodsA prospective database of 1172 patients with clinically node-negative breast cancer who underwent SLNB from January 2005 to December 2013 at Keio University Hospital was analyzed and 35 patients with IBTR underwent SLNB. Sentinel lymph nodes (SLNs) were detected using a combined method of blue dye and radioisotope or indocyanine green fluorescence in cases with failure of identification by blue dye and radioisotope.ResultsTwenty-two patients had previous SLNB, eight had previous axillary lymph node dissection (ALND), and five had no previous axillary surgery. Overall, SLNs were successfully identified in 28 (80.0%) of 35 patients. The identification rate in patients with previous SLNB, ALND and no axillary surgery was 81.8% (18/22), 75% (6/8) and 80% (4/5), respectively (P = 0.52). Aberrant drainage outside the ipsilateral axilla was found more frequently in patients with previous ALND compared with SLNB and no axillary treatment (37.5% vs. 4.5% vs. 0%, P = 0.048). No axillary recurrence was observed after median follow-up of 40.3 months from the second surgery for IBTR.ConclusionsSLNB is a technically feasible and valid procedure for staging and treatment of regional lymph nodes in patients with IBTR.Copyright © 2015 IJS Publishing Group Limited. Published by Elsevier Ltd. All rights reserved.

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