^○Yuji Iwashita¹, Kei Ito¹, Shinsuke Koshita¹, Yoshihide Kanno¹, Takahisa Ogawa¹, Kaori Masu¹, Yosuke Michikawa¹, Reina Yamada¹, Go Kobayashi¹, Yutaka Noda¹, Masaya Oikawa², Hiroshi Honda², Takashi Tsuchiya², Takashi Sawai³ (1.Dept. of Gastroenterology, Sendai City Medical Center, Sendai, Japan, 2.Department of Surgery, Sendai City Medical Center, Sendai, Japan, 3.Department of Pathology, Sendai City Medical Center, Sendai, Japan)

^○Yoshitaka Nakai, Yoshio Itokawa, Toshihiro Kusaka, Takeharu Nakamura, Mari Teramura, Daizen Hirata, Youko Oiwa, Satoshi Araki, Yumi Tomita, Hideyuki Tanaka, Atsuyuki Ikeda, Shigehiko Fujii, Hidemasa Azeti, Hiroyuki Kokuryu (Digestive Disease Center. Kyoto-Katsura Hospital,Kyoto,Japan)

^○Issei Kojima¹, TESSHIN BAN¹, Fumihiro Okumura², Hitoshi Sano², Itaru Naitou³, Kazuki Hayashi³, Takahiro Nakazawa³, ETSURO ORITO¹ (1.Nagoya Daini Red-Cross Hospital,Nagoya,Japan, 2.Gifu Prefectural Tajimi Hospital,Tajimi,Japan, 3.Nagoya City University Hospital,Nagoya,Japan)

^○Emiri Kita¹, Taketo Yamaguchi¹, Rintaro Mikata⁴, Rino Nankinzan¹, Osamu Sugita¹, Akiko Tsujimoto¹, Hiroyuki Arai¹, Yoshiyasu Kitagawa¹, Nami Nakamura¹, Nei Soma¹, Takuto Suzuki¹, Kentaro Sudo¹, Kazuyoshi Nakamura¹, Taro Hara¹, Tadamichi Denda¹, Hiroshi Yamamoto², Makiko Itami³ (1.Dept. of Gastroenterology, Chiba Cancer Center, Chiba, Japan, 2.Dept. Gastroenterological surgery, Chiba Cancer Center, Chiba, Japan, 3.Dept. of Surgical pathology, Chiba Cancer Center, Chiba Japan, 4.Dept. Gastroenterology and nephrology, Gaduate school of Medicine, Chiba University)

^○Kiyofumi Ishii^1,2, Taro Hara³, Rintaro Mikata², Dai Ikebe⁴, Taketo Yamaguchi³, takeshi ishihara², Katsunobu Tawada², shin yasui², Osamu Yokosuka² (1.Kimitsu Chuo Hospital, Japan, 2.Department of Gastroenterology, Chiba University Graduate School of Medicine, Chiba, Japan, 3.Division of Gastroenterology, Chiba Cancer Center, Chiba, Japan, 4.Division of Surgical Pathology, Chiba Cancer Center, Chiba, Japan)