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noriya uedo

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https://www.readbyqxmd.com/read/29439278/delineation-of-the-extent-of-early-gastric-cancer-by-magnifying-narrow-band-imaging-and-chromoendoscopy-a-multicenter-randomized-controlled-trial
#1
Takashi Nagahama, Kenshi Yao, Noriya Uedo, Hisashi Doyama, Tetsuya Ueo, Kunihisa Uchita, Hideki Ishikawa, Takashi Kanesaka, Yasuhito Takeda, Kurato Wada, Kentaro Imamura, Hisatomi Arima, Toshio Shimokawa
BACKGROUND: Accurate delineation of tumor margins is necessary for curative resection of early gastric cancer (EGC). The objective of this multicenter, randomized, controlled study was to compare the accuracy with which magnifying narrow-band imaging (M-NBI) and indigo carmine chromoendoscopy delineate EGC margins. METHODS: Patients with EGC ≥ 10 mm undergoing endoscopic or surgical resection were enrolled. The oral-side margins of the lesions were first evaluated with conventional white-light endoscopy in both groups and then delineated by either chromoendoscopy or M-NBI...
February 13, 2018: Endoscopy
https://www.readbyqxmd.com/read/29424030/efficacy-of-traction-assisted-colorectal-endoscopic-submucosal-dissection-using-a-clip-and-thread-technique-a-prospective-randomized-study
#2
Yasushi Yamasaki, Yoji Takeuchi, Noriya Uedo, Takashi Kanesaka, Minoru Kato, Kenta Hamada, Yusuke Tonai, Noriko Matsuura, Tomofumi Akasaka, Noboru Hanaoka, Koji Higashino, Ryu Ishihara, Hiroyuki Okada, Hiroyasu Iishi
OBJECTIVES: Colorectal endoscopic submucosal dissection (ESD) remains challenging because of technical difficulties, long procedure time, and high risk of adverse events. To facilitate colorectal ESD, we developed traction-assisted colorectal ESD using a clip-and-thread (TAC-ESD) and conducted a randomized controlled trial to evaluate its efficacy. METHODS: Patients with superficial colorectal neoplasms (SCNs) ≥20 mm were enrolled and randomly assigned to the conventional-ESD or TAC-ESD group...
February 9, 2018: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/29399611/multiple-convex-demarcation-line-for-prediction-of-benign-depressed-gastric-lesions-in-magnifying-narrow-band-imaging
#3
Takashi Kanesaka, Noriya Uedo, Kenshi Yao, Yasumasa Ezoe, Hisashi Doyama, Ichiro Oda, Kazuhiro Kaneko, Yoshiro Kawahara, Chizu Yokoi, Yasushi Sugiura, Hideki Ishikawa, Yoji Takeuchi, Masamichi Arao, Taro Iwatsubo, Hiroyoshi Iwagami, Kenji Matsuno, Manabu Muto, Yutaka Saito, Yasuhiko Tomita
Background and study aims:  With magnifying narrow-band imaging (M-NBI) of the gastric mucosa, a characteristic demarcation line (DL) is occasionally found in non-cancerous depressed lesions. This DL forms multiple convex shapes along the edge of the epithelia of surrounding mucosa. We have termed this novel finding a multiple convex DL (MCDL). In this study, we clarified the prevalence of an MCDL in depressed gastric lesions detected in patients at high risk for gastric cancer and determined the diagnostic yield necessary to distinguish between cancer and non-cancer...
February 2018: Endoscopy International Open
https://www.readbyqxmd.com/read/29393159/current-status-of-endoscopic-resection-for-superficial-nonampullary-duodenal-epithelial-tumors
#4
Yasushi Yamasaki, Noriya Uedo, Yoji Takeuchi, Ryu Ishihara, Hiroyuki Okada, Hiroyasu Iishi
BACKGROUND: Endoscopic resection (ER) is becoming the first choice of treatment for treating superficial nonampullary duodenal epithelial tumors (SNADETs), but ER procedures for SNADETs remain challenging because of the difficulty experienced in maneuvering the endoscope toward the thin duodenal wall, which results in a high rate of adverse events. Although several ER methods were used to overcome these technical difficulties and complications, ER methods for SNADETs are not standardized...
February 1, 2018: Digestion
https://www.readbyqxmd.com/read/29351704/safety-of-cold-snare-polypectomy-for-duodenal-adenomas-in-familial-adenomatous-polyposis-a-prospective-exploratory-study
#5
Kenta Hamada, Yoji Takeuchi, Hideki Ishikawa, Yasumasa Ezoe, Masamichi Arao, Sho Suzuki, Taro Iwatsubo, Minoru Kato, Yusuke Tonai, Satoki Shichijo, Yasushi Yamasaki, Noriko Matsuura, Hiroko Nakahira, Takashi Kanesaka, Sachiko Yamamoto, Tomofumi Akasaka, Noboru Hanaoka, Koji Higashino, Noriya Uedo, Ryu Ishihara, Hiroyuki Okada, Hiroyasu Iishi
BACKGROUND:  Cold snare polypectomy (CSP) to remove multiple duodenal adenomas (MDAs) in patients with familial adenomatous polyposis (FAP) could be an effective and less invasive method than more extensive surgery. The aim of the present study was to determine the safety of this procedure. METHODS:  This prospective exploratory study included 10 consecutive patients with FAP and MDAs who underwent CSP for as many as 50 duodenal adenomas. The primary outcome was the incidence of severe adverse events...
January 19, 2018: Endoscopy
https://www.readbyqxmd.com/read/29311724/erratum-dive-to-the-underwater-world-a-water-immersion-technique-for-endoscopic-submucosal-dissection-of-gastric-neoplasms
#6
Tomofumi Akasaka, Yusuke Tonai, Kenta Hamada, Yoji Takeuchi, Noriya Uedo, Ryu Ishihara, Hiroyasu Iishi
This corrects the article DOI: 10.1038/ajg.2016.595.
January 2018: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/29302739/comparison-of-endo-cut-mode-and-forced-coag-mode-for-the-formation-of-stricture-after-esophageal-endoscopic-submucosal-dissection-in-an-in-vivo-porcine-model
#7
Masamichi Arao, Ryu Ishihara, Yusuke Tonai, Taro Iwatsubo, Satoki Shichijyo, Noriko Matsuura, Hiroko Nakahira, Sachiko Yamamoto, Yoji Takeuchi, Koji Higashino, Noriya Uedo, Shinichi Nakatsuka
BACKGROUND AND STUDY AIM: Stricture is a major complication of esophageal endoscopic submucosal dissection (ESD) for superficial esophageal carcinoma. To date, various methods have been developed to prevent stricture. However, the mechanism by which different electrosurgical unit (ESU) modes affect the formation of post-ESD stricture has not been evaluated. This study aimed to compare the degree of stricture caused by two major ESU modes (ENDO CUT mode and FORCED COAG mode) in a porcine model...
January 4, 2018: Surgical Endoscopy
https://www.readbyqxmd.com/read/29225083/computer-aided-diagnosis-for-identifying-and-delineating-early-gastric-cancers-in-magnifying-narrow-band-images
#8
Takashi Kanesaka, Tsung-Chun Lee, Noriya Uedo, Kun-Pei Lin, Huai-Zhe Chen, Ji-Yuh Lee, Hsiu-Po Wang, Hsuan-Ting Chang
BACKGROUND AND AIMS: Magnifying narrow-band imaging (M-NBI) is important in the diagnosis of early gastric cancers (EGCs), but requires expertise to master. We developed a computer-aided diagnosis (CADx) system to assist endoscopists in identifying and delineating EGCs. METHODS: We retrospectively collected and randomly selected 66 EGC M-NBI images and 60 non-cancer M-NBI images into a training set, and 61 EGC M-NBI images and 20 non-cancer M-NBI images into a test set...
December 7, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/29210900/development-of-image-enhanced-endoscopy-of-the-gastrointestinal-tract-a-review-of-history-and-current-evidences
#9
Shiaw-Hooi Ho, Noriya Uedo, Akira Aso, Shuji Shimizu, Yutaka Saito, Kenshi Yao, Khean-Lee Goh
Endoscopy imaging of the gastrointestinal (GI) tract has evolved tremendously over the last few decades. Key milestones in the development of endoscopy imaging include the use of various dyes for chromoendoscopy, the application of optical magnification in endoscopy, the introduction of high-definition image capturing and display technology and the application of altered illuminating light to achieve vascular and surface enhancement. Aims of this review paper are to summarize the development and evolution of modern endoscopy imaging and in particular, imaged-enhanced endoscopy (IEE), to promote appropriate usage, and to guide future development of good endoscopy practice...
November 28, 2017: Journal of Clinical Gastroenterology
https://www.readbyqxmd.com/read/29126335/line-assisted-endoscopic-complete-closure-of-a-large-perforation-during-colonic-endoscopic-submucosal-dissection
#10
Hiroko Nakahira, Yoji Takeuchi, Jose Santiago Garcia, Yoshinori Morita, Noriya Uedo, Ryu Ishihara, Alberto Herreros de Tejada
No abstract text is available yet for this article.
January 2018: Endoscopy
https://www.readbyqxmd.com/read/29122604/clinical-predictors-of-histological-type-of-gastric-cancer
#11
Takashi Kanesaka, Takashi Nagahama, Noriya Uedo, Hisashi Doyama, Tetsuya Ueo, Kunihisa Uchita, Naohiro Yoshida, Yasuhito Takeda, Kentaro Imamura, Kurato Wada, Hideki Ishikawa, Kenshi Yao
BACKGROUND AND AIMS: Gastric cancer is classified into differentiated and undifferentiated types according to the degree of glandular differentiation. Undifferentiated-type early gastric cancer (EGC) carries a higher risk of lymph node metastasis than differentiated type, and the indication criteria for endoscopic resection thus differ. This study aimed to clarify the diagnostic abilities of clinical predictors to distinguish between differentiated-type and undifferentiated-type EGCs...
November 6, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28976027/underwater-endoscopic-mucosal-resection-of-an-intramucosal-carcinoma-located-from-the-lower-rectum-to-the-anal-canal
#12
LETTER
Kenta Hamada, Noriya Uedo, Hitoshi Tanishita
No abstract text is available yet for this article.
October 4, 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28970290/a-comparison-of-the-resection-rate-for-cold-and-hot-snare-polypectomy-for-4-9-mm-colorectal-polyps-a-multicentre-randomised-controlled-trial-crescent-study
#13
Takuji Kawamura, Yoji Takeuchi, Satoshi Asai, Isao Yokota, Eisuke Akamine, Minoru Kato, Takuji Akamatsu, Kazuhiro Tada, Yoriaki Komeda, Mineo Iwatate, Ken Kawakami, Michiko Nishikawa, Daisuke Watanabe, Atsushi Yamauchi, Norimasa Fukata, Masaaki Shimatani, Makoto Ooi, Koichi Fujita, Yasushi Sano, Hiroshi Kashida, Satoru Hirose, Hiroyoshi Iwagami, Noriya Uedo, Satoshi Teramukai, Kiyohito Tanaka
OBJECTIVE: To investigate the success rate of cold snare polypectomy (CSP) for complete resection of 4-9 mm colorectal adenomatous polyps compared with that of hot snare polypectomy (HSP). DESIGN: A prospective, multicentre, randomised controlled, parallel, non-inferiority trial conducted in 12 Japanese endoscopy units. Endoscopically diagnosed sessile adenomatous polyps, 4-9 mm in size, were randomly assigned to the CSP or HSP group. After complete removal of the polyp using the allocated technique, biopsy specimens from the resection margin after polypectomy were obtained...
September 28, 2017: Gut
https://www.readbyqxmd.com/read/28966062/the-incidence-of-lymph-node-metastasis-in-early-gastric-cancer-according-to-the-expanded-criteria-in-comparison-with-the-absolute-criteria-of-the-japanese-gastric-cancer-association-a%C3%A2-systematic-review-of-the-literature-and-meta-analysis
#14
REVIEW
Mohamed M Abdelfatah, Mohamed Barakat, Hyuk Lee, Jae J Kim, Noriya Uedo, Ian Grimm, Mohamed O Othman
BACKGROUND AND AIMS: Japanese criteria for curative endoscopic resection of early gastric cancer initially included nonulcerated, well-differentiated mucosal lesions ≤2 cm in diameter, known as the absolute criteria. Subsequently, these indications were expanded to include larger, ulcerated, and undifferentiated mucosal lesions as well as differentiated lesions with slight submucosal invasion. Whether patients meeting the expanded criteria can be managed safely without gastrectomy and lymph node dissection has been controversial...
September 28, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28962044/underwater-endoscopic-mucosal-resection-for-superficial-nonampullary-duodenal-adenomas
#15
Yasushi Yamasaki, Noriya Uedo, Yoji Takeuchi, Koji Higashino, Noboru Hanaoka, Tomofumi Akasaka, Minoru Kato, Kenta Hamada, Yusuke Tonai, Noriko Matsuura, Takashi Kanesaka, Masamichi Arao, Sho Suzuki, Taro Iwatsubo, Satoki Shichijo, Hiroko Nakahira, Ryu Ishihara, Hiroyasu Iishi
Background and study aim Underwater endoscopic mucosal resection (UEMR) was recently developed in a Western country. A prospective cohort study to investigate the effectiveness of UEMR was conducted in patients with small superficial nonampullary duodenal adenomas. Patients and methods Patients with duodenal adenomas ≤ 20 mm were enrolled. After the duodenal lumen had been filled with physiological saline, UEMR was performed without submucosal injection. Endoclip closure was attempted for all mucosal defects after UEMR...
September 29, 2017: Endoscopy
https://www.readbyqxmd.com/read/28771241/efficacy-and-safety-of-endoscopic-resection-followed-by-chemoradiotherapy-for-superficial-esophageal-squamous-cell-carcinoma-a-retrospective-study
#16
Kenta Hamada, Ryu Ishihara, Yasushi Yamasaki, Noboru Hanaoka, Sachiko Yamamoto, Masamichi Arao, Sho Suzuki, Taro Iwatsubo, Minoru Kato, Yusuke Tonai, Satoki Shichijo, Noriko Matsuura, Hiroko Nakahira, Takashi Kanesaka, Tomofumi Akasaka, Yoji Takeuchi, Koji Higashino, Noriya Uedo, Hiroyasu Iishi, Naoyuki Kanayama, Takero Hirata, Yoshifumi Kawaguchi, Koji Konishi, Teruki Teshima
OBJECTIVES: The reported 1- and 3-year overall survival rates after esophagectomy for stage I superficial esophageal squamous cell carcinoma (SESCC) are 95-97% and 86%, and those after definitive chemoradiotherapy (CRT) are 98% and 89%, respectively. This study was performed to elucidate the efficacy and safety of another treatment option for SESCC: endoscopic resection (ER) followed by CRT. METHODS: We retrospectively reviewed the overall survival, recurrence, and grade ≥3 adverse events of consecutive patients who refused esophagectomy and underwent ER followed by CRT for SESCC from 1 January 2006 to 31 December 2012...
August 3, 2017: Clinical and Translational Gastroenterology
https://www.readbyqxmd.com/read/28744940/report-of-the-international-symposiums-at-the-93rd-congress-of-japan-gastroenterological-endoscopy-society-in-osaka-2017
#17
EDITORIAL
Satoki Shichijo, Noriya Uedo, Yutaka Saito
In this session, each speaker presented papers about training situations from various countries including USA, Sweden, Philippine, Latin America, Vietnam, Cambodia, Hong Kong, and Japan, each followed by a short discussion on the topic. This session allowed Japanese and foreign experts to exchange opinions and improve mutual understanding (Table 1). This article is protected by copyright. All rights reserved.
July 26, 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28725062/dive-to-the-underwater-world-a-water-immersion-technique-for-endoscopic-submucosal-dissection-of-gastric-neoplasms
#18
Tomofumi Akasaka, Yusuke Tonai, Kenta Hamada, Yoji Takeuchi, Noriya Uedo, Ryu Ishihara, Hiroyasu Iishi
No abstract text is available yet for this article.
July 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28637065/evaluation-of-an-e-learning-system-for-diagnosis-of-gastric-lesions-using-magnifying-narrow-band-imaging-a-multicenter-randomized-controlled-study
#19
Hiroyoshi Nakanishi, Hisashi Doyama, Hideki Ishikawa, Noriya Uedo, Takuji Gotoda, Mototsugu Kato, Shigeaki Nagao, Yasuaki Nagami, Hiroyuki Aoyagi, Atsushi Imagawa, Junichi Kodaira, Shinya Mitsui, Nozomu Kobayashi, Manabu Muto, Hajime Takatori, Takashi Abe, Masahiko Tsujii, Jiro Watari, Shuhei Ishiyama, Ichiro Oda, Hiroyuki Ono, Kazuhiro Kaneko, Chizu Yokoi, Tetsuya Ueo, Kunihisa Uchita, Kenshi Matsumoto, Takashi Kanesaka, Yoshinori Morita, Shinichi Katsuki, Jun Nishikawa, Katsuhisa Inamura, Tetsu Kinjo, Katsumi Yamamoto, Daisuke Yoshimura, Hiroshi Araki, Hiroshi Kashida, Ayumu Hosokawa, Hirohito Mori, Haruhiro Yamashita, Osamu Motohashi, Kazuhiko Kobayashi, Michiaki Hirayama, Hiroyuki Kobayashi, Masaki Endo, Hiroo Yamano, Kazunari Murakami, Tomoyuki Koike, Kingo Hirasawa, Youichi Miyaoka, Hidetaka Hamamoto, Takuto Hikichi, Norihiro Hanabata, Ryo Shimoda, Shinichiro Hori, Tadashi Sato, Shinya Kodashima, Hiroyuki Okada, Tomohiko Mannami, Shojiro Yamamoto, Yasumasa Niwa, Kazuo Yashima, Satoshi Tanabe, Hiro Satoh, Fumisato Sasaki, Tetsuro Yamazato, Yoshiou Ikeda, Hogara Nishisaki, Masahiro Nakagawa, Akio Matsuda, Fumio Tamura, Hitoshi Nishiyama, Keiko Arita, Keisuke Kawasaki, Kazushige Hoppo, Masashi Oka, Shinichi Ishihara, Michita Mukasa, Hiroaki Minamino, Kenshi Yao
Background and study aim Magnifying narrow-band imaging (M-NBI) is useful for the accurate diagnosis of early gastric cancer (EGC). However, acquiring skill at M-NBI diagnosis takes substantial effort. An Internet-based e-learning system to teach endoscopic diagnosis of EGC using M-NBI has been developed. This study evaluated its effectiveness. Participants and methods This study was designed as a multicenter randomized controlled trial. We recruited endoscopists as participants from all over Japan. After completing Test 1, which consisted of M-NBI images of 40 gastric lesions, participants were randomly assigned to the e-learning or non-e-learning groups...
October 2017: Endoscopy
https://www.readbyqxmd.com/read/28561163/multiple-white-flat-lesions-in-the-gastric-corpus-are-not-intestinal-metaplasia
#20
Noriya Uedo, Rino Yamaoka, Kenshi Yao
No abstract text is available yet for this article.
June 2017: Endoscopy
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