^○Yuiko Nagasawa, Yuichi Endo, Kazuhiro Tada, Kunihiro Saga, Hiroomi Takayama, Teijiro Hirashita, Hiroki Uchida, Yukio Iwashita, Masayuki Ohta, Masafumi Inomata (Gastroenterological and Pediatric Surgery, Oita University Faculty of Medicine)

^○Satoshi Tabuchi¹, Shuuichi Tobinaga¹, Kiyoaki Hamada¹, Hideo Wada¹, Kouki Wakata¹, Takashi Nonaka¹, Masaki Kunizaki¹, Yorihisa Sumida¹, Shigekazu Hidaka¹, Takeshi Nagayasu¹, Hirotaka Karata² (1.Department of SURGICAL ONCOLOGY, Nagasaki University Graduate School of Biomedical Sciences ,Nagasaki,Japan, 2.Department of Pathology, Nagasaki University Graduate School of Biomedical Sciences ,Nagasaki,Japan)

^○Nobuyuki Nishizawa, Yoshiya Ito, Shigenori Ei, Hiroshi Tajima, Takashi Kaizu, Yusuke Kumamoto, Masahiko Watanabe (Department of Surgery, Kitasato University Hospital, Kanagawa, Japan)

^○Hisashi Kasugai¹, Mikiko Takahashi² (1.Department of Surgery, Kawasaki-rinnkou Hospital, Kawasaki, Japan, 2.Department of diagnostic pathology)