Hyo Jung An1, Woohyung Lee2, Chi-Young Jeong2. 1. Deparment of Pathology, Gyeongsang National University Changwon Hospital, Seongsan-gu, Changwon-si, Korea. 2. Department of Surgery, Gyeongsang National University Hospital, Gyeongsang National University Postgraduate School of Medicine, Jinju, Korea.