Ji Young You1, Eun Sook Lee2*, Siew Kuan Lim3, Youngmee Kwon2 and So-Youn Jung2 1Breast and Endocrine Division, Department of Surgery, Korea University Medical Center, Seoul, Republic of Korea 2Center for Breast Cancer, National Cancer Center, Research Institute and Hospital, Goyang, Gyeonggi, Republic of Korea 3Department of Surgery, Breast Service, Changi General Hospital, Singapore, Singapore Background: Recent data from the ACOSOG Z0011 trial suggest that axillary lymph node dissection...