e13060 Background: The accuracy of the nomogram about non-sentinel lymph node metastasis (NSLNM ) in breast cancer patients is still controversial to avoid axillary dissection particularly sentinel lymph node biopsy was positive. The aim of this study was to evaluate the necessity of adding breast cancer subtypes to the NSLNM nomgram variables. Methods: Between 2009 and 2011, consecutive breast cancer patients without clinically axillary lymph node metastasis (n=140) who received sentinel lymph node biopsy at Higashiosaka General Hospital were studied retrospectively. Twenty-two patients were turned out that breast cancer already spread to the sentinel nodes and all of 22 patients received complete axillary lymph node dissection. Results: Twelve patients had only sentinel lymph node metastases(Group S), 10 patients had non-SLN metastases (Group A). Patient characteristics and average probability of spread to additional lymph node developed by Memorial Sloan-Kettering Cancer Center (MSKCC) Nomogram were almost the same results in both groups. However, subtypes of Group S consisted of 8 HER2 positive , 2 triple negative, and 2 luminal A cases, subtypes of Group A consisted of 4 luminal A and 6 luminal B cases. Conclusions: Our data suggested that luminal type breast cancer tends to spread to non-sentinel lymph node metastasis and adding HER2, Ki-67, and intrinsic biological subtypes may improve predictivity of MSKCC nomogram.
Early Results of Omitting Completion Axillary Lymph Node Dissection in Sentinel Lymph Node Metastasis-Positive Breast Cancer Patients
