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149 results on '"Takenaka, Ryuta"'

1. Long-term outcomes of patients with primary intestinal follicular lymphoma managed with watch-and-wait strategy

Author

Iwamuro, Masaya, Tanaka, Takehiro, Ennishi, Daisuke, Matsueda, Kazuhiro, Yoshioka, Masao, Miyahara, Koji, Sakaguchi, Chihiro, Nishimura, Mamoru, Nagahara, Teruya, Mannami, Tomohiko, Takenaka, Ryuta, Oka, Shohei, Inoue, Masafumi, Takimoto, Hidetaka, Inaba, Tomoki, Kobayashi, Sayo, Toyokawa, Tatsuya, Tsugeno, Hirofumi, Suzuki, Seiyuu, Sawada, Sachiko, Tanaka, Shouichi, Tsuzuki, Takao, and Okada, Hiroyuki

Published
2023
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2. Potential for expanding indications and curability criteria of endoscopic resection for early gastric cancer in elderly patients: results from a Japanese multicenter prospective cohort study

Author

Sekiguchi, Masau, Suzuki, Haruhisa, Takizawa, Kohei, Hirasawa, Toshiaki, Takeuchi, Yoji, Ishido, Kenji, Hoteya, Shu, Yano, Tomonori, Tanaka, Shinji, Toya, Yosuke, Nakagawa, Masahiro, Toyonaga, Takashi, Takemura, Kenichi, Hirasawa, Kingo, Matsuda, Mitsuru, Yamamoto, Hironori, Tsuji, Yosuke, Hashimoto, Satoru, Maeda, Yuki, Oyama, Tsuneo, Takenaka, Ryuta, Yamamoto, Yoshinobu, Shimazu, Taichi, Ono, Hiroyuki, Tanabe, Satoshi, Kondo, Hitoshi, Iishi, Hiroyasu, Ninomiya, Motoki, and Oda, Ichiro

Published
2024
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3. Long-term Survival After Endoscopic Resection For Gastric Cancer: Real-world Evidence From a Multicenter Prospective Cohort

Author

Mashimo, Yumi, Ishigooka, Masahiro, Fukase, Kazutoshi, Mizuguchi, Yasuhiko, Suzuki, Haruhisa, Ono, Hiroyuki, Hirasawa, Toshiaki, Takeuchi, Yoji, Ishido, Kenji, Hoteya, Shu, Yano, Tomonori, Tanaka, Shinji, Toya, Yosuke, Nakagawa, Masahiro, Toyonaga, Takashi, Takemura, Kenichi, Hirasawa, Kingo, Matsuda, Mitsuru, Yamamoto, Hironori, Tsuji, Yosuke, Hashimoto, Satoru, Yuki, Maeda, Oyama, Tsuneo, Takenaka, Ryuta, Yamamoto, Yoshinobu, Naito, Yuji, Yamamoto, Katsumi, Kobayashi, Nozomu, Kawahara, Yoshiro, Hirano, Masaaki, Koizumi, Shigeto, Hori, Shinichiro, Tajika, Masahiro, Hikichi, Takuto, Yao, Kenshi, Yokoi, Chizu, Ohnita, Ken, Hisanaga, Yasuhiro, Sumiyoshi, Tetsuya, Kitamura, Shinji, Tanaka, Hisao, Shimoda, Ryo, Shimazu, Taichi, Takizawa, Kohei, Tanabe, Satoshi, Kondo, Hitoshi, Iishi, Hiroyasu, Ninomiya, Motoki, and Oda, Ichiro

Published
2023
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4. Nonrecurrence Rate of Underwater EMR for ≤20-mm Nonampullary Duodenal Adenomas: A Multicenter Prospective Study (D-UEMR Study)

Author

Kanzaki, Hiromitsu, Inoue, Shuntaro, Miyake, Muneaki, Ohmori, Masayasu, Takeuchi, Yoji, Tani, Yasuhiro, Harada, Nobuyuki, Agatsuma, Nobukazu, Okada, Keijirou, Ikenouchi, Maiko, Nakatani, Yasuki, Uenoyama, Yoshito, Yamashita, Yukitaka, Ishikawa, Shigenao, Inaba, Tomoki, Miyahara, Koji, Moritou, Yuki, Nakagawa, Masahiro, Kitae, Hiroaki, Ishida, Tsugitaka, Naito, Yuji, Nishio, Akiyoshi, Shimatani, Masaaki, Kato, Ryo, Taki, Shinya, Mandai, Koichiro, Sanada, Kasumi, Nakase, Kojiro, Nebiki, Hiroko, Saito, Shunsuke, Wakatsuki, Toshiyuki, Nishimura, Naoyuki, Yamasaki, Yasushi, Uedo, Noriya, Akamatsu, Takuji, Kagawa, Tomo, Higashi, Reiji, Dohi, Osamu, Furukawa, Masanori, Takahashi, Yu, Inoue, Takuya, Tanaka, Shouichi, Takenaka, Ryuta, Iguchi, Mikitaka, Kawamura, Takuji, Tsuzuki, Takao, Yamasaki, Tomoaki, Yamashina, Takeshi, Nasu, Junichiro, Mannami, Tomohiko, Yamauchi, Atsushi, Matsueda, Kazuhiro, Aizawa, Shigeyuki, Mitsuhashi, Toshiharu, and Okada, Hiroyuki

Published
2022
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7. Long-term monitoring of gastric mucosa-associated lymphoid tissue lymphoma in patients with extra copies of the MALT1 gene

Author

Iwamuro, Masaya, primary, Takenaka, Ryuta, additional, Miyahara, Koji, additional, Okanoue, Shotaro, additional, Yoshioka, Masao, additional, Sakaguchi, Chihiro, additional, Yamamoto, Kumiko, additional, Kawai, Yoshinari, additional, Toyokawa, Tatsuya, additional, Tanaka, Takehiro, additional, and Otsuka, Motoyuki, additional

Published
2024
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8. Endoscopic and clinical features of gastric emphysema

Author

Iwamuro, Masaya, primary, Takenaka, Ryuta, additional, Toyokawa, Tatsuya, additional, Kita, Masahide, additional, Tsuzuki, Takao, additional, Yoshioka, Masao, additional, Gotoda, Tatsuhiro, additional, Okanoue, Shotaro, additional, Matsubara, Minoru, additional, Sakaguchi, Chihiro, additional, and Otsuka, Motoyuki, additional

Published
2023
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11. Results of the interim analysis of a prospective, multicenter, observational study of small subepithelial lesions in the stomach.

Author

Iwamuro, Masaya, Mitsuhashi, Toshiharu, Inaba, Tomoki, Matsueda, Kazuhiro, Nagahara, Teruya, Takeuchi, Yoji, Doyama, Hisashi, Mizuno, Masakatsu, Yada, Tomoyuki, Kawai, Yoshinari, Nakamura, Jun, Matsubara, Minoru, Nebiki, Hiroko, Niimi, Keiko, Toyokawa, Tatsuya, Takenaka, Ryuta, Takeda, Sho, Tanaka, Shouichi, Nishimura, Mamoru, and Tsuzuki, Takao

Subjects
SCIENTIFIC observation, STOMACH, NATURAL history, TUMOR surgery, GASTROINTESTINAL stromal tumors
Abstract

Objectives: Long‐term outcomes of gastric subepithelial lesions have not been elucidated. To reveal the natural history, we initiated a prospective, 10‐year follow‐up of patients with small (≤20 mm) gastric subepithelial lesions in September 2014. Here, we report the results of an interim analysis of a prospective observational study. Methods: In total, 567 patients with 610 lesions were prospectively registered between September 2014 and August 2016. The location, size, morphology, and number of subepithelial lesions were recorded on a web‐based case report form. This study has been conducted as an Academic Committee Working Group of the Japan Gastroenterological Endoscopy Society. Results: The endoscopic follow‐up period was 4.60 ± 1.73 years (mean ± standard deviation), and survival data were investigated for 5.28 ± 1.68 years. This interim analysis revealed that the estimated cumulative incidence of a size increase ≥5 mm, after accounting for patients' death and resection of the tumor as competing risk events, was 4.5% at 5 years. In addition, the estimated cumulative incidence of lesion size increase ≥5 mm or resection of lesions was 7.9% at 5 years, and that of size increase ≥10 mm or resection of lesions was 4.5% at 5 years. Conclusion: These results indicate that approximately one in 13 patients with small (≤20 mm) gastric subepithelial lesions may require resection or further investigation for increased tumor size (≥5 mm) within 5 years. [ABSTRACT FROM AUTHOR]

Published
2024
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13. Results of the interim analysis of a prospective, multicenter, observational study of small subepithelial lesions in the stomach

Author

Iwamuro, Masaya, primary, Mitsuhashi, Toshiharu, additional, Inaba, Tomoki, additional, Matsueda, Kazuhiro, additional, Nagahara, Teruya, additional, Takeuchi, Yoji, additional, Doyama, Hisashi, additional, Mizuno, Masakatsu, additional, Yada, Tomoyuki, additional, Kawai, Yoshinari, additional, Nakamura, Jun, additional, Matsubara, Minoru, additional, Nebiki, Hiroko, additional, Niimi, Keiko, additional, Toyokawa, Tatsuya, additional, Takenaka, Ryuta, additional, Takeda, Sho, additional, Tanaka, Shouichi, additional, Nishimura, Mamoru, additional, Tsuzuki, Takao, additional, Akahoshi, Kazuya, additional, Furuta, Takahisa, additional, Haruma, Ken, additional, and Okada, Hiroyuki, additional

Published
2023
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14. Clinicopathological Characteristics of Superficial Barrett's Adenocarcinoma in a Japanese Population: A Retrospective, Multicenter Study

Author

Hamada, Kenta, Kanzaki, Hiromitsu, Miyahara, Koji, Nakagawa, Masahiro, Mouri, Hirokazu, Mizuno, Motowo, Takahashi, Sakuma, Hori, Shinichiro, Nasu, Junichiro, Tsuzuki, Takao, Miyaike, Jiro, Takenaka, Ryuta, Yamauchi, Kenji, Kobayashi, Sayo, Toyokawa, Tatsuya, Inoue, Masafumi, Nishimura, Mamoru, Matsubara, Minoru, Tomoda, Jun, Yamasaki, Yasushi, Tanaka, Takehiro, Shirakawa, Yasuhiro, Kawahara, Yoshiro, Fujiwara, Toshiyoshi, Okada, Hiroyuki, and Okayama Gut Study Group

Subjects
Barrett's adenocarcinoma, lesion, surgery, Barrett Esophagus, endoscopic resection, Esophageal Neoplasms, Japan, short -segment Barrett's esophagus, metachronous, Humans, Adenocarcinoma, Retrospective Studies, long -segment Barrett's esophagus
Abstract

Objective Although Barrett's adenocarcinoma (BA) remains a minor disease in Japan, its incidence has been gradually increasing. We analyzed the characteristics of BA in Japanese populations. Methods We retrospectively reviewed medical records and analyzed the clinicopathological differences between short-segment Barrett's esophagus (SSBE) and long-segment Barrett's esophagus (LSBE), as well as metastasis. Local recurrence and metachronous lesions were analyzed only in patients who underwent endoscopic resection (ER). Patients Consecutive patients who had pathological T1 BAs resected by ER or surgery from January 2003 Results A total of 168 patients were analyzed, including 139 with SSBE and 29 with LSBE. In total, 67% of the SSBE lesions and 32% of the LSBE lesions were located between 0 and 3 o'clock (p=0.0014). No patients who achieved pathological margin-free resection (pR0) and 17% of patients who did not achieve pR0 experienced local recurrence (p=0.0131). None of the patients without lymphovascular involvement, a poorly differentiated component, lesion size of >30 mm, and submucosal invasion of >500 mu m experienced metastasis. The 5-year cumulative incidence rate of metachronous BA after ER was 0% in patients with SSBE and 40% in patients with LSBE (p=0.0005). Conclusion Superficial BA was likely to be detected at the right anterior wall of SSBE in the Japanese population. The risk for metachronous BA after ER was high in Japanese patients with LSBE, as in Western patients.

Published
2022

15. Long-term Survival After Endoscopic Resection For Gastric Cancer: Real-world Evidence From a Multicenter Prospective Cohort

Author

Suzuki, Haruhisa, primary, Ono, Hiroyuki, additional, Hirasawa, Toshiaki, additional, Takeuchi, Yoji, additional, Ishido, Kenji, additional, Hoteya, Shu, additional, Yano, Tomonori, additional, Tanaka, Shinji, additional, Toya, Yosuke, additional, Nakagawa, Masahiro, additional, Toyonaga, Takashi, additional, Takemura, Kenichi, additional, Hirasawa, Kingo, additional, Matsuda, Mitsuru, additional, Yamamoto, Hironori, additional, Tsuji, Yosuke, additional, Hashimoto, Satoru, additional, Yuki, Maeda, additional, Oyama, Tsuneo, additional, Takenaka, Ryuta, additional, Yamamoto, Yoshinobu, additional, Naito, Yuji, additional, Yamamoto, Katsumi, additional, Kobayashi, Nozomu, additional, Kawahara, Yoshiro, additional, Hirano, Masaaki, additional, Koizumi, Shigeto, additional, Hori, Shinichiro, additional, Tajika, Masahiro, additional, Hikichi, Takuto, additional, Yao, Kenshi, additional, Yokoi, Chizu, additional, Ohnita, Ken, additional, Hisanaga, Yasuhiro, additional, Sumiyoshi, Tetsuya, additional, Kitamura, Shinji, additional, Tanaka, Hisao, additional, Shimoda, Ryo, additional, Shimazu, Taichi, additional, Takizawa, Kohei, additional, Tanabe, Satoshi, additional, Kondo, Hitoshi, additional, Iishi, Hiroyasu, additional, Ninomiya, Motoki, additional, Oda, Ichiro, additional, Mashimo, Yumi, additional, Ishigooka, Masahiro, additional, Fukase, Kazutoshi, additional, and Mizuguchi, Yasuhiko, additional

Published
2023
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17. Multicenter Prospective Study on the Safety of Upper Gastrointestinal Endoscopic Procedures in Antithrombotic Drug Users

Author

Kono, Yoshiyasu, Matsubara, Minoru, Toyokawa, Tatsuya, Takenaka, Ryuta, Suzuki, Seiyu, Nasu, Junichirou, Yoshioka, Masao, Nakagawa, Masahiro, Mizuno, Motowo, Sakae, Hiroyuki, Abe, Makoto, Gotoda, Tatsuhiro, Miura, Ko, Kanzaki, Hiromitsu, Iwamuro, Masaya, Hori, Keisuke, Tsuzuki, Takao, Kita, Masahide, Kawano, Seiji, Kawahara, Yoshiro, and Okada, Hiroyuki

Published
2017
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18. Prospective multicenter study of the efficacy and safety of cold forceps polypectomy for ≤ 6-mm non-ampullary duodenal low-grade adenomas

Author

Kanzaki, Hiromitsu, additional, Horii, Joichiro, additional, Takenaka, Ryuta, additional, Nakagawa, Hiroyuki, additional, Matsueda, Kazuhiro, additional, Tsuzuki, Takao, additional, Kita, Masahide, additional, Yamasaki, Yasushi, additional, Tanaka, Takehiro, additional, Iwamuro, Masaya, additional, Kawano, Seiji, additional, Kawahara, Yoshiro, additional, Tomoda, Jun, additional, and Okada, Hiroyuki, additional

Published
2022
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19. Nonrecurrence Rate of Underwater EMR for ≤20-mm Nonampullary Duodenal Adenomas: A Multicenter Prospective Study (D-UEMR Study)

Author

Yamasaki, Yasushi, primary, Uedo, Noriya, additional, Akamatsu, Takuji, additional, Kagawa, Tomo, additional, Higashi, Reiji, additional, Dohi, Osamu, additional, Furukawa, Masanori, additional, Takahashi, Yu, additional, Inoue, Takuya, additional, Tanaka, Shouichi, additional, Takenaka, Ryuta, additional, Iguchi, Mikitaka, additional, Kawamura, Takuji, additional, Tsuzuki, Takao, additional, Yamasaki, Tomoaki, additional, Yamashina, Takeshi, additional, Nasu, Junichiro, additional, Mannami, Tomohiko, additional, Yamauchi, Atsushi, additional, Matsueda, Kazuhiro, additional, Aizawa, Shigeyuki, additional, Mitsuhashi, Toshiharu, additional, Okada, Hiroyuki, additional, Kanzaki, Hiromitsu, additional, Inoue, Shuntaro, additional, Miyake, Muneaki, additional, Ohmori, Masayasu, additional, Takeuchi, Yoji, additional, Tani, Yasuhiro, additional, Harada, Nobuyuki, additional, Agatsuma, Nobukazu, additional, Okada, Keijirou, additional, Ikenouchi, Maiko, additional, Nakatani, Yasuki, additional, Uenoyama, Yoshito, additional, Yamashita, Yukitaka, additional, Ishikawa, Shigenao, additional, Inaba, Tomoki, additional, Miyahara, Koji, additional, Moritou, Yuki, additional, Nakagawa, Masahiro, additional, Kitae, Hiroaki, additional, Ishida, Tsugitaka, additional, Naito, Yuji, additional, Nishio, Akiyoshi, additional, Shimatani, Masaaki, additional, Kato, Ryo, additional, Taki, Shinya, additional, Mandai, Koichiro, additional, Sanada, Kasumi, additional, Nakase, Kojiro, additional, Nebiki, Hiroko, additional, Saito, Shunsuke, additional, Wakatsuki, Toshiyuki, additional, and Nishimura, Naoyuki, additional

Published
2022
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22. SIGNIFICANCE OF EUS IN THE FOLLOW-UP OF SMALL SUBEPITHELIAL LESIONS IN THE STOMACH: A PROSPECTIVE, MULTICENTER, OBSERVATIONAL STUDY.

Author

Nebiki, Hiroko, Iwamuro, Masaya, Inaba, Tomoki, Matsueda, Kazuhiro, Takeuchi, Yoji, Nagahara, Teruya, Doyama, Hisashi, Mizuno, Masakatsu, Yada, Tomoyuki, Kawai, Yoshinari, Nakamura, Jun, Matubara, Minoru, Toyokawa, Tatsuya, Takenaka, Ryuta, Takeda, Sho, Tanaka, Shouichi, Nishimura, Mamoru, Tsuzuki, Takao, Akahoshi, Kazuya, and Fujishiro, Mitsuhiro

Published
2024
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23. Clinical and phenotypical characteristics of submucosal invasive carcinoma in non-ampullary duodenal cancer

Author

Matsueda, Katsunori, primary, Kanzaki, Hiromitsu, additional, Takenaka, Ryuta, additional, Nakagawa, Masahiro, additional, Matsueda, Kazuhiro, additional, Iwamuro, Masaya, additional, Kawano, Seiji, additional, Kawahara, Yoshiro, additional, Toji, Tomohiro, additional, Tanaka, Takehiro, additional, Yagi, Takahito, additional, Fujiwara, Toshiyoshi, additional, and Okada, Hiroyuki, additional

Published
2021
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24. Balloon Enteroscopy-Assisted Endoscopic Retrograde Cholangiopancreatography for the Treatment of Common Bile Duct Stones in Patients with Roux-en-Y Gastrectomy: Outcomes and Factors Affecting Complete Stone Extraction

Author

Obata, Taisuke, primary, Tsutsumi, Koichiro, additional, Kato, Hironari, additional, Ueki, Toru, additional, Miyamoto, Kazuya, additional, Yamazaki, Tatsuhiro, additional, Matsumi, Akihiro, additional, Fujii, Yuki, additional, Matsumoto, Kazuyuki, additional, Horiguchi, Shigeru, additional, Yasugi, Kengo, additional, Ogawa, Tsuneyoshi, additional, Takenaka, Ryuta, additional, and Okada, Hiroyuki, additional

Published
2021
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25. Erratum to: Multicenter Prospective Study on the Safety of Upper Gastrointestinal Endoscopic Procedures in Antithrombotic Drug Users

Author

Kono, Yoshiyasu, Matsubara, Minoru, Toyokawa, Tatsuya, Takenaka, Ryuta, Suzuki, Seiyu, Nasu, Junichirou, Yoshioka, Masao, Nakagawa, Masahiro, Mizuno, Motowo, Sakae, Hiroyuki, Abe, Makoto, Gotoda, Tatsuhiro, Miura, Ko, Kanzaki, Hiromitsu, Iwamuro, Masaya, Hori, Keisuke, Tsuzuki, Takao, Kita, Masahide, Kawano, Seiji, Kawahara, Yoshiro, and Okada, Hiroyuki

Published
2017
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26. A multicenter survey of enteroscopy for the diagnosis of intestinal follicular lymphoma

Author

IWAMURO, MASAYA, OKADA, HIROYUKI, KAWANO, SEIJI, SHIODE, JUNJI, TAKENAKA, RYUTA, IMAGAWA, ATSUSHI, INABA, TOMOKI, SUZUKI, SEIYU, NISHIMURA, MAMORU, MIZUNO, MOTOWO, ARAKI, MASASHI, MANNAMI, TOMOHIKO, UEKI, TORU, KOBASHI, HARUHIKO, FUKATSU, HARUKA, TANAKA, SHOUICHI, OMOTO, AKIYOSHI, KAWAI, YOSHINARI, KITAGAWA, TAKASHI, TOYOKAWA, TATSUYA, TAKATA, KATSUYOSHI, YOSHINO, TADASHI, TAKAKI, AKINOBU, and YAMAMOTO, KAZUHIDE

Published
2015
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33. Continued Aspirin Treatment May Be a Risk Factor of Delayed Bleeding after Gastric Endoscopic Submucosal Dissection under Heparin Replacement: A Retrospective Multicenter Study

Author

Hamada, Kenta, primary, Kanzaki, Hiromitsu, additional, Inoue, Masafumi, additional, Ishiyama, Shuhei, additional, Yamauchi, Kenji, additional, Miyahara, Koji, additional, Toyokawa, Tatsuya, additional, Tsuzuki, Takao, additional, Miyaike, Jiro, additional, Matsubara, Minoru, additional, Takahashi, Sakuma, additional, Nishimura, Mamoru, additional, Takenaka, Ryuta, additional, Yunoki, Naoko, additional, Hori, Shinichiro, additional, Kobayashi, Sayo, additional, Yamasaki, Yasushi, additional, Kawahara, Yoshiro, additional, Ishikawa, Hideki, additional, and Okada, Hiroyuki, additional

Published
2020
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34. The clinicopathological features of submucosal invasive non-ampullary duodenal carcinoma

Author

Matsueda, Katsunori, primary, Kanzaki, Hiromitsu, additional, Takenaka, Ryuta, additional, Nakagawa, Masahiro, additional, Matsueda, Kazuhiro, additional, Iwamuro, Masaya, additional, Kawano, Seiji, additional, Kawahara, Yoshiro, additional, Toji, Tomohiro, additional, Tanaka, Takehiro, additional, Yagi, Takahito, additional, Fujiwara, Toshiyoshi, additional, and Okada, Hiroyuki, additional

Published
2020
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35. Diagnostic Role of 18F-Fluorodeoxyglucose Positron Emission Tomography in Gastric Mesenchymal Tumors

Author

Iwamuro, Masaya, primary, Miyahara, Koji, additional, Sakaguchi, Chihiro, additional, Takenaka, Ryuta, additional, Kobayashi, Sayo, additional, Mouri, Hirokazu, additional, Tanaka, Shigetomi, additional, Toyokawa, Tatsuya, additional, Tanaka, Shouichi, additional, Nishimura, Mamoru, additional, Yamauchi, Kenji, additional, Tanaka, Takehiro, additional, and Okada, Hiroyuki, additional

Published
2020
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37. Mo1174 CLINICOPATHOLOGICAL CHARACTERISTICS AND RISK FACTORS FOR METASTASIS OF SUPERFICIAL BARRETT'S ADENOCARCINOMA:A MULTICENTER RETROSPECTIVE OBSERVATIONAL STUDY

Author

Mouri, Hirokazu, primary, Mizuno, Motowo, additional, Hamada, Kenta, additional, Kanzaki, Hiromitsu, additional, Okada, Hiroyuki, additional, Takahashi, Sakuma, additional, Nasu, Junichiro, additional, Miyaike, Jiro, additional, Yamauchi, Kenji, additional, Takenaka, Ryuta, additional, Kobayashi, Sayo, additional, Toyokawa, Tatsuya, additional, Inoue, Masafumi, additional, Nishimura, Mamoru, additional, Matubara, Minoru, additional, and Tomoda, Jun, additional

Published
2019
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38. Su1251 – Clinicopathological Features of Sporadic Non-Ampullary Duodenal Adenoma and Carcinoma: A Multicenter Retrospective Observational Study

Author

Matsueda, Katsunori, primary, Kanzaki, Hiromitsu, additional, Matsueda, Kazuhiro, additional, Nasu, Junichiro, additional, Yoshioka, Masao, additional, Nakagawa, Masahiro, additional, Inoue, Masafumi, additional, Inaba, Tomoki, additional, Imagawa, Atsushi, additional, Takatani, Masahiro, additional, Takenaka, Ryuta, additional, Suzuki, Seiyu, additional, Tomoda, Jun, additional, Tanaka, Takehiro, additional, and Okada, Hiroyuki, additional

Published
2019
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39. The clinicopathological differences of sporadic non‐ampullary duodenal epithelial neoplasm depending on tumor location

Author

Matsueda, Katsunori, primary, Kanzaki, Hiromitsu, additional, Matsueda, Kazuhiro, additional, Nasu, Junichiro, additional, Yoshioka, Masao, additional, Nakagawa, Masahiro, additional, Inoue, Masafumi, additional, Inaba, Tomoki, additional, Imagawa, Atsushi, additional, Takatani, Masahiro, additional, Takenaka, Ryuta, additional, Suzuki, Seiyu, additional, Tomoda, Jun, additional, Yagi, Takahito, additional, Fujiwara, Toshiyoshi, additional, Tanaka, Takehiro, additional, and Okada, Hiroyuki, additional

Published
2019
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41. A multicenter observational study on the clinicopathological features of gastric cancer in young patients

Author

Kono, Yoshiyasu, primary, Kanzaki, Hiromitsu, additional, Tsuzuki, Takao, additional, Takatani, Masahiro, additional, Nasu, Junichirou, additional, Kawai, Daisuke, additional, Takenaka, Ryuta, additional, Tanaka, Takehiro, additional, Iwamuro, Masaya, additional, Kawano, Seiji, additional, Kawahara, Yoshiro, additional, Fujiwara, Toshiyoshi, additional, and Okada, Hiroyuki, additional

Published
2018
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42. Long-term outcomes of endoscopic versus surgical resection for MM-SM1 esophageal squamous cell carcinoma using propensity score analysis.

Author

Yamauchi, Kenji, Iwamuro, Masaya, Nakagawa, Masahiro, Takenaka, Ryuta, Matsueda, Kazuhiro, Inaba, Tomoki, Yoshioka, Masao, Toyokawa, Tatsuya, Tanaka, Shouichi, Kanzaki, Hiromitsu, Kawano, Seiji, Kawahara, Yoshiro, Shirakawa, Yasuhiro, and Okada, Hiroyuki

Abstract

Background: Esophageal squamous cell carcinoma (ESCC) confined to the muscularis mucosae (MM) or up to 200 µm of the submucosa (SM1) confers the risk for lymph node metastasis, and is defined as relative indication for endoscopic submucosal dissection (ESD) by the Japan Esophageal Society guidelines. Although additional surgical treatment after ESD is recommended, long-term outcomes of ESD compared with those of surgery have not been clarified. This study aimed to evaluate the long-term outcomes of ESD and surgery for cN0M0 relative indication lesions of ESCC. Methods: Between 2006 and 2016, patients with relative indication lesions of ESCC who underwent ESD or surgery at nine participating hospitals were examined retrospectively. Using propensity score matching, we evaluated survival curves for and hazard ratios associated with endoscopic submucosal dissection and surgery. Results: In total, 155 lesions in the ESD group and 106 lesions in the surgery group met the pathological criteria of relative indication for endoscopic resection. After matching, 50 matched pairs of patients who underwent ESD or surgery were selected. The 5-year overall survival rates were 84.5% [95% confidence interval (CI) 68–93] in the ESD group and 79% [95% CI 60–90] in the surgery group. The hazard ratio of mortality for ESD compared with that for surgery estimated by Cox regression analysis was 0.79 (95% CI 0.3–2.06, p = 0.63). Conclusions: Compared with surgery, ESD does not compromise long-term outcomes. ESD alone or ESD with chemotherapy and/or radiotherapy may be an option for the treatment of MM and SM1 ESCC. [ABSTRACT FROM AUTHOR]

Published
2021
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43. Importance of Second-look Endoscopy on an Empty Stomach for Finding Gastric Bezoars in Patients with Gastric Ulcers

Author

Iwamuro, Masaya, Tanaka, Shouichi, Moritou, Yuki, Inaba, Tomoki, Higashi, Reiji, Kusumoto, Chiaki, Yunoki, Naoko, Ishikawa, Shin, Okamoto, Yuko, Kawai, Yoshinari, Kitada, Ken-ichi, Takenaka, Ryuta, Toyokawa, Tatsuya, and Okada, Hiroyuki

Subjects
Adult, Aged, 80 and over, Male, Delayed Diagnosis, Adolescent, gastric ulcer, Tomography, X-Ray, digestive, oral, and skin physiology, Stomach, bezoar, Middle Aged, digestive system diseases, phytobezoar, Bezoars, Young Adult, Gastric Emptying, Gastroscopy, foreign bodies, Humans, Female, Stomach Ulcer, Child, Intestinal Obstruction, Aged, Retrospective Studies
Abstract

Most gastric bezoars can be treated with endoscopic fragmentation combined with or without cola dissolution, whereas laparotomy or laparoscopic surgery is generally inevitable for small intestinal bezoars because they cause small bowel obstruction. Therefore, early diagnosis and management of gastric bezoars are necessary to prevent bezoar-induced ileus. To investigate the incidence of overlooked gastric bezoars during the initial esophagogastroduodenoscopy, we retrospectively reviewed the cases of 27 patients diagnosed with gastrointestinal bezoars. The bezoars were diagnosed using esophagogastroduodenoscopy (n=25), abdominal ultrasonography (n=1), and barium follow-through examination (n=1). Bezoars were overlooked in 9/25 patients (36.0%) during the initial endoscopy examination because the bezoars were covered with debris in the stomach. Of the 9 patients, 8 had concomitant gastric ulcers, and the other patient had gastric lymphoma. Although a computed tomography (CT) scan was performed before the second-look endoscopy in 8 of the 9 patients, the bezoars were mistaken as food debris on CT findings and were overlooked in these patients. In conclusion, gastric bezoars may not be discovered during the initial esophagogastroduodenoscopy and CT scan. In cases with debris in the stomach, second-look endoscopy is essential to detect bezoars.

Published
2017

44. Clinical Outcomes of Endoscopic Hemostasis in Marginal Ulcer Bleeding

Author

Yamasaki, Yasushi, Takenaka, Ryuta, Hori, Keisuke, Takemoto, Koji, Kawano, Seiji, Kawahara, Yoshiro, Fujiki, Shigeatsu, and Okada , Hiroyuki

Subjects
Male, upper gastrointestinal bleeding, marginal ulcer, Hemostasis, Endoscopic, Humans, Female, proton-pump inhibitor, Gastrointestinal Hemorrhage, endoscopic hemostasis, Ulcer
Abstract

The usefulness of endoscopy in marginal ulcer bleeding has rarely been studied, and the optimal method for preventing rebleeding is unclear. Here we assessed the efficacy of endoscopy in marginal ulcer bleeding and examined the efficacy of proton pump inhibitors (PPIs) in the prevention of rebleeding. A total of 28 patients with marginal ulcer bleeding (21 men, 7 women; median age 58.5 years) were treated by endoscopy. We analyzed the clinical characteristics, results of endoscopic therapy, characteristics of rebleeding patients, and relation between the use of PPIs and the duration of rebleeding. Sixteen patients had active bleeding. Initial hemostasis was achieved in all patients. There were no procedure-related adverse events. Rebleeding occurred in one patient within the first month and in 7 patients thereafter. There was a significant difference in the rebleeding rate between the patients who received a PPI and those who did not. In a multivariate analysis, the non-use of PPIs was a risk factor for rebleeding (hazard ratio, 6.22). Therapeutic endoscopy is effective in achieving hemostasis from marginal ulcer bleeding. PPIs may prevent rebleeding from marginal ulcers.

Published
2016

46. The characteristics and outcomes of small bowel adenocarcinoma: a multicentre retrospective observational study

Author

Sakae, Hiroyuki, primary, Kanzaki, Hiromitsu, additional, Nasu, Junichiro, additional, Akimoto, Yutaka, additional, Matsueda, Kazuhiro, additional, Yoshioka, Masao, additional, Nakagawa, Masahiro, additional, Hori, Shinichiro, additional, Inoue, Masafumi, additional, Inaba, Tomoki, additional, Imagawa, Atsushi, additional, Takatani, Masahiro, additional, Takenaka, Ryuta, additional, Suzuki, Seiyu, additional, Fujiwara, Toshiyoshi, additional, and Okada, Hiroyuki, additional

Published
2017
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47. Linked color imaging (LCI), a novel image-enhanced endoscopy technology, emphasizes the color of early gastric cancer

Author

Kanzaki, Hiromitsu, additional, Takenaka, Ryuta, additional, Kawahara, Yoshiro, additional, Kawai, Daisuke, additional, Obayashi, Yuka, additional, Baba, Yuki, additional, Sakae, Hiroyuki, additional, Gotoda, Tatsuhiro, additional, Kono, Yoshiyasu, additional, Miura, Ko, additional, Iwamuro, Masaya, additional, Kawano, Seiji, additional, Tanaka, Takehiro, additional, and Okada, Hiroyuki, additional

Published
2017
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49. Management of gastric mucosa-associated lymphoid tissue lymphoma in patients with extra copies of theMALT1gene

Author

Iwamuro, Masaya, primary, Takenaka, Ryuta, additional, Nakagawa, Masahiro, additional, Moritou, Yuki, additional, Saito, Shunsuke, additional, Hori, Shinichiro, additional, Inaba, Tomoki, additional, Kawai, Yoshinari, additional, Toyokawa, Tatsuya, additional, Tanaka, Takehiro, additional, Yoshino, Tadashi, additional, and Okada, Hiroyuki, additional

Published
2017
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50. Comparing reduced-dose sodium phosphate tablets to 2 L of polyethylene glycol: A randomized study

Author

Ako, Soichiro, primary, Takemoto, Koji, additional, Yasutomi, Eriko, additional, Sakaguchi, Chihiro, additional, Murakami, Mayu, additional, Sunami, Tomoko, additional, Oka, Shohei, additional, Kenta, Hamada, additional, Okazaki, Noriko, additional, Baba, Yuki, additional, Yamasaki, Yasushi, additional, Asato, Toshiyuki, additional, Kawai, Daisuke, additional, Takenaka, Ryuta, additional, Tsugeno, Hirohumi, additional, Hiraoka, Sakiko, additional, Kato, Jun, additional, and Fujiki, Shigeatsu, additional

Published
2017
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