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B. Van Calster, I. VandenBempt, M. Drijkoningen, N. Pochet, J. Cheng, S. Van Huffel, W. Hendrickx, J. Decock, H. J. Huang, K. Leunen, F. Amant, P. Berteloot, R. Paridaens, H. Wildiers, E. Van Limbergen, C. Weltens, D. Timmerman, T. Van Gorp, A. Smeets, W. Van den Bogaert, I. Vergote, M. R. Christiaens and P. Neven, “Axillary Lymph Node Status of Operable Breast Cancers by Combined Steroid Receptor and HER-2 Status: Triple Positive Tumours Are More Likely Lymph Node Positive,” Breast Cancer Research and Treatment, Vol. 113, No. 1, 2009, pp. 181-187. doi:10.1007/s10549-008-9914-7

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• TITLE: The Association between Sentinel Lymph Node Metastasis and Ki-67 Labeling Index

  AUTHORS: Yu Koyama, Hiroshi Ichikawa, Jun Sakata, Eiko Sakata, Kumiko Tatsuda, Miki Hasegawa, Chie Toshikawa, Naoko Manba, Mayuko Ikarashi, Toshifumi Wakai

  KEYWORDS: Breast Cancer; Sentinel Lymph Node; Molecular Subtypes; Ki-67 Labeling Index

  JOURNAL NAME: Advances in Breast Cancer Research, Vol.2 No.3, June 24, 2013

  ABSTRACT: Background: The purpose of this study was to elucidate the association between sentinel lymph node (SLN) metastasis and Ki67 labeling index and to elucidate whether Ki-67 was useful or not for prediction of SLN metastasis in breast cancer. Methods: We identified 343 invasive breast cancer patients with sentinel lymph node biopsy (SLNB) from 2003 to 2012. The association between SLN status and clinicopathological features, molecular subtypes and Ki-67 labeling index were evaluated. Results: SLN metastasis was detected in 79 patients (23.0%). SLN metastasis was significantly associated with clinical T-stage (p = 0.0003), lymphovascular involvement (LVI) (p 0.0001). Ki-67 labeling index of primary tumor was significantly lower in SLN positive patients (p = 0.0331), and Ki-67 cut-off point of 7.5% was useful for dividing SLN positive from negative (p = 0.0197). Conclusion: Low value of Ki-67 labeling index, in addition to progression of clinical T-stage and presence of LVI, is significantly associated with SLN metastasis, and it seems to be useful to consider Ki-67 labeling index for SLN metastasis prediction.