S
Shiro Oka
Researcher at Hiroshima University
Publications - 347
Citations - 9887
Shiro Oka is an academic researcher from Hiroshima University. The author has contributed to research in topics: Medicine & Internal medicine. The author has an hindex of 47, co-authored 285 publications receiving 8234 citations.
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Journal ArticleDOI
Advantage of endoscopic submucosal dissection compared with EMR for early gastric cancer
Shiro Oka,Shinji Tanaka,Iwao Kaneko,Ritsuo Mouri,Mayuko Hirata,Toru Kawamura,Masaharu Yoshihara,Kazuaki Chayama +7 more
TL;DR: ESD increased en bloc and histologically complete resection rates and may reduce the local recurrence rate and increased operation time and complication risks with ESD in comparison with EMR remain problematic.
Journal ArticleDOI
Endoscopic submucosal dissection for colorectal neoplasia: possibility of standardization.
Shinji Tanaka,Shiro Oka,Iwao Kaneko,Mayuko Hirata,Ritsuo Mouri,Hiroyuki Kanao,Shigeto Yoshida,Kazuaki Chayama +7 more
TL;DR: With regard to ESD of the colon, complication, eg, perforation, could be decreased by sufficient practice and selection of an appropriate knife.
Journal ArticleDOI
Narrow-band imaging (NBI) magnifying endoscopic classification of colorectal tumors proposed by the Japan NBI Expert Team.
Yasushi Sano,Shinji Tanaka,Shin-ei Kudo,Shoichi Saito,Takahisa Matsuda,Yoshiki Wada,Takahiro Fujii,Hiroaki Ikematsu,Toshio Uraoka,Nozomu Kobayashi,Hisashi Nakamura,Kinichi Hotta,Takahiro Horimatsu,Naoto Sakamoto,Kuang-I Fu,Osamu Tsuruta,Hiroshi Kawano,Hiroshi Kashida,Yoji Takeuchi,Hirohisa Machida,Toshihiro Kusaka,Naohisa Yoshida,Ichiro Hirata,Takeshi Terai,Hiro-o Yamano,Kazuhiro Kaneko,Takeshi Nakajima,Taku Sakamoto,Yuichiro Yamaguchi,Naoto Tamai,Naoko Nakano,Nana Hayashi,Shiro Oka,Mineo Iwatate,Hideki Ishikawa,Yoshitaka Murakami,Shigeaki Yoshida,Yutaka Saito +37 more
TL;DR: The Japan NBI Expert Team was constituted with the aim of establishing a universal NBI magnifying endoscopic classification for colorectal tumors (JNET classification) in 2011, and consensus was reached on this classification using the modified Delphi method in June 2014.
Journal ArticleDOI
Clinicopathologic features and endoscopic treatment of superficially spreading colorectal neoplasms larger than 20 mm
Shinji Tanaka,Ken Haruma,Shiro Oka,Ryoji Takahashi,Masaki Kunihiro,Yasuhiko Kitadai,Masaharu Yoshihara,Fumio Shimamoto,Kazuaki Chayama +8 more
TL;DR: Laterally spreading tumors larger than 20 mm, especially those of the G-type, have a low rate of invasion despite their relatively large size and EMR is an effective and safe treatment for the large laterally spreading tumor.
Journal ArticleDOI
Colorectal endoscopic submucosal dissection: present status and future perspective, including its differentiation from endoscopic mucosal resection.
TL;DR: It is hoped that colorectal tumors will be efficiently treated by a treatment method appropriately selected from among EMR, ESD, and surgical resection after precise preoperative diagnosis based on techniques such as magnifying colonoscopy.