Clinical Implications According to Diagnostic Methods of Human Epidermal Growth Factor Receptor 2 Positivity in Breast Cancer: A Retrospective Study

Clinical Implications According to Diagnostic Methods of Human Epidermal Growth Factor Receptor 2 Positivity in Breast Cancer: A Retrospective Study Bong Kyun Kim, Joon Jeong, Wonshik Han, Tae-In Yoon, Min-Ki Seong, Jin Hyang Jung, Sung Hoo Jung, Jina Lee, Woo Young Sun, Korean Breast Cancer Society Department of Surgery, Daejeon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Daejeon; Department of Surgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul; Department of Surgery and Cancer Research Institute, Seoul National University College of Medicine, Seoul; Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul; Department of Surgery, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul; Department of Surgery, Kyungpook National University School of Medicine, Daegu; Department of Surgery, Chonbuk National University Medical School, Jeonju, Korea