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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
#1
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...
June 21, 2017: Endoscopy
https://www.readbyqxmd.com/read/28561163/multiple-white-flat-lesions-in-the-gastric-corpus-are-not-intestinal-metaplasia
#2
Noriya Uedo, Rino Yamaoka, Kenshi Yao
No abstract text is available yet for this article.
June 2017: Endoscopy
https://www.readbyqxmd.com/read/28469360/investigation-of-mucosal-pattern-of-gastric-antrum-using-magnifying-narrow-band-imaging-in-patients-with-chronic-atrophic-fundic-gastritis
#3
Yasushi Yamasaki, Noriya Uedo, Hiromitsu Kanzaki, Minoru Kato, Kenta Hamada, Kenji Aoi, Yusuke Tonai, Noriko Matsuura, Takashi Kanesaka, Takeshi Yamashina, Tomofumi Akasaka, Noboru Hanaoka, Yoji Takeuchi, Koji Higashino, Ryu Ishihara, Yasuhiko Tomita, Hiroyasu Iishi
BACKGROUND: Magnifying narrow-band imaging (M-NBI) can reportedly help predict the presence and distribution of atrophy and intestinal metaplasia in the gastric corpus. However, the micro-mucosal pattern of the antrum shown by M-NBI differs from that of the corpus. We studied the distribution and histology of the micro-mucosal pattern in the antrum based on magnifying endoscopy. METHODS: Endoscopic images of the greater curvature of the antrum were evaluated in 50 patients with chronic atrophic fundic gastritis (CAFG)...
2017: Annals of Gastroenterology: Quarterly Publication of the Hellenic Society of Gastroenterology
https://www.readbyqxmd.com/read/28425657/different-time-trend-and-management-of-esophagogastric-junction-adenocarcinoma-in-three-asian-countries
#4
Waku Hatta, Daniel Tong, Yeong Yeh Lee, Shin Ichihara, Noriya Uedo, Takuji Gotoda
Esophagogastric junction (EGJ) adenocarcinoma has been on the increase in Western countries. However, in Asian countries, data on the incidence of EGJ adenocarcinoma are evidently lacking. In the present review, we focus on the current clinical situation of EGJ adenocarcinoma in three Asian countries: Japan, Hong Kong, and Malaysia. The incidence of EGJ adenocarcinoma has been reported to be gradually increasing in Malaysia and Japan, whereas it has stabilized in Hong Kong. However, the number of cases in these countries is comparatively low compared with Western countries...
April 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28425656/considering-the-esophagogastric-junction-as-a-zone
#5
Shin Ichihara, Noriya Uedo, Takuji Gotoda
Siewert's classification of adenocarcinoma of the esophagogastric junction (EGJ) classifies tumors anatomically for determining the appropriate surgical technique. According to this classification, a type II tumor, true carcinoma of the cardia, is defined as a cancer within 1 cm proximal to 2 cm distal of the EGJ. Histological analysis indicates that the cardiac gland is present with a high degree of frequency between 1-2 cm to the gastric side and 1-2 cm to the esophageal side of the EGJ, which means that this zone can be considered as neither the stomach nor the esophagus but rather as a third zone known as the 'EGJ zone'...
April 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28425653/endoscopic-gastric-mucosal-atrophy-distinguishes-the-characteristics-of-superficial-esophagogastric-junction-adenocarcinoma
#6
Noriya Uedo, Toshiyuki Yoshio, Shigetaka Yoshinaga, Manabu Takeuchi, Waku Hatta, Tomonori Yano, Tokuma Tanuma, Osamu Goto, Akiko Takahashi, Daniel Tong, Yeong Yeh Lee, Yoshiko Nakayama, Shin Ichihara, Takuji Gotoda
BACKGROUND AND AIM: Western studies have suggested two distinct etiologies of esophagogastric junction (EGJ) cancer: Helicobacter pylori-associated atrophic gastritis and non-atrophic gastric mucosa resembling esophageal adenocarcinoma. The present study investigated whether endoscopic gastric mucosal atrophy can distinguish between these two types of EGJ adenocarcinoma. METHODS: Data were collected from patients with Siewert type II, T1 EGJ adenocarcinoma who underwent endoscopic or surgical resection at eight Japanese institutions in 2010-2015...
April 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28337479/technical-feasibility-of-line-assisted-complete-closure-technique-for-large-mucosal-defects-after-colorectal-endoscopic-submucosal-dissection
#7
Minoru Kato, Yoji Takeuchi, Yasushi Yamasaki, Masamichi Arao, Sho Suzuki, Taro Iwatsubo, Kenta Hamada, Yusuke Tonai, Satoki Shichijo, Noriko Matsuura, Hiroko Nakahira, Takashi Kanesaka, Tomofumi Akasaka, Noboru Hanaoka, Koji Higashino, Noriya Uedo, Ryu Ishihara, Hiroyasu Iishi
Background and study aims Complete closure of large mucosal defects after colorectal endoscopic submucosal dissection (C-ESD) is considered impossible in most cases because of the limited width of the open clip. We therefore invented a simple closure technique using clip-and-line, named "line-assisted complete closure (LACC)", and assessed its technical feasibility. Patients and methods Between January and February 2016, we performed LACC in 11 patients after C-ESD and included them in this retrospective feasibility study...
January 2017: Endoscopy International Open
https://www.readbyqxmd.com/read/28277895/serrated-polyps-a-concealed-but-prevalent-precursor-of-colorectal-cancer
#8
Henrik Thorlacius, Yoji Takeuchi, Takashi Kanesaka, Otto Ljungberg, Noriya Uedo, Ervin Toth
Serrated polyps have long been considered to lack malignant potential but accumulating data suggest that these lesions may cause up to one-third of all sporadic colorectal cancer. Serrated polyps are classified into three subtypes, including sessile serrated adenomas/polyps (SSA/Ps), traditional serrated adenomas (TSAs), and hyperplastic polyps (HPs). SSA/P and TSA harbour malignant potential but TSA represents only 1-2%, wheras SSA/P constitute up to 20% of all serrated lesions. HPs are most common (80%) of all serrated polyps but are considered to have a low potential of developing colorectal cancer...
June 2017: Scandinavian Journal of Gastroenterology
https://www.readbyqxmd.com/read/28258560/new-subtype-of-gastric-adenocarcinoma-mixed-fundic-and-pyloric-mucosa-type-adenocarcinoma
#9
Takashi Kanesaka, Noriya Uedo, Kenshi Yao, Hiroshi Tanabe, Yasushi Yamasaki, Yoji Takeuchi, Akinori Iwashita, Yasuhiko Tomita
A 73-year-old woman underwent upper endoscopic screening that revealed a 30-mm superficial elevated lesion in the anterior wall of the upper gastric body. The lesion had a whitish color and coarse granular surface in conventional white light endoscopy. Magnifying narrow-band imaging indicated irregular microvascular and microsurface patterns within a demarcation line. The microvessels had a distorted polygonal shape within the area surrounded by the marginal crypt epithelium. The patient underwent endoscopic resection...
June 2017: Clinical Journal of Gastroenterology
https://www.readbyqxmd.com/read/28192823/incomplete-resection-rate-of-cold-snare-polypectomy-a-prospective-single-arm-observational-study
#10
Noriko Matsuura, Yoji Takeuchi, Takeshi Yamashina, Takashi Ito, Kenji Aoi, Kengo Nagai, Takashi Kanesaka, Fumi Matsui, Mototsugu Fujii, Tomofumi Akasaka, Noboru Hanaoka, Koji Higashino, Yasuhiko Tomita, Yuri Ito, Ryu Ishihara, Hiroyasu Iishi, Noriya Uedo
Background and study aims Cold snare polypectomy (CSP) is considered to be safe for the removal of subcentimeter colorectal polyps. This study aimed to determine the rate of incomplete CSP resection for subcentimeter neoplastic polyps at our center. Patients and methods Patients with small or diminutive adenomas (diameter 1 - 9 mm) were recruited to undergo CSP until no polyp was visible. After CSP, a 1 - 3 mm margin around the resection site was removed using endoscopic mucosal resection. The polyps and resection site marginal specimens were microscopically evaluated...
March 2017: Endoscopy
https://www.readbyqxmd.com/read/28181701/primary-gastric-choriocarcinoma-developed-in-a-helicobacter-pylori-negative-patient
#11
LETTER
Taro Iwatsubo, Noriya Uedo, Kazunobu Ishibashi
No abstract text is available yet for this article.
May 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28152974/endoscopic-imaging-modalities-for-diagnosing-invasion-depth-of-superficial-esophageal-squamous-cell-carcinoma-a-systematic-review-and-meta-analysis
#12
REVIEW
Ryu Ishihara, Noriko Matsuura, Noboru Hanaoka, Sachiko Yamamoto, Tomofumi Akasaka, Yoji Takeuchi, Koji Higashino, Noriya Uedo, Hiroyasu Iishi
BACKGROUND: Diagnosis of cancer invasion depth is crucial for selecting the optimal treatment strategy in patients with gastrointestinal cancers. We conducted a meta-analysis to determine the utilities of different endoscopic modalities for diagnosing invasion depth of esophageal squamous cell carcinoma (SCC). METHODS: We conducted a comprehensive search of MEDLINE, Cochrane Central, and Ichushi databases to identify studies evaluating the use of endoscopic modalities for diagnosing invasion depth of superficial esophageal SCC...
February 2, 2017: BMC Gastroenterology
https://www.readbyqxmd.com/read/28068699/line-assisted-complete-closure-of-duodenal-mucosal-defects-after-underwater-endoscopic-mucosal-resection
#13
Yasushi Yamasaki, Yoji Takeuchi, Noriya Uedo, Noboru Hanaoka, Koji Higashino, Ryu Ishihara, Hiroyasu Iishi
No abstract text is available yet for this article.
February 2017: Endoscopy
https://www.readbyqxmd.com/read/28042250/underwater-endoscopic-mucosal-resection-of-a-condyloma-acuminatum-of-the-anal-canal
#14
Kenta Hamada, Noriya Uedo, Yasuhiko Tomita, Ryu Ishihara
No abstract text is available yet for this article.
2017: Annals of Gastroenterology: Quarterly Publication of the Hellenic Society of Gastroenterology
https://www.readbyqxmd.com/read/28032233/development-of-an-e-learning-system-for-teaching-endoscopists-how-to-diagnose-early-gastric-cancer-basic-principles-for-improving-early-detection
#15
REVIEW
Kenshi Yao, Noriya Uedo, Manabu Muto, Hideki Ishikawa
We developed an internet e-learning system in order to improve the ability of endoscopists to diagnose gastric cancer at an early stage. The efficacy of this system at expanding knowledge and providing invaluable experience regarding the endoscopic detection of early gastric cancer was demonstrated through an international multicenter randomized controlled trial. However, the contents of the system have not yet been fully described in the literature. Accordingly, we herein introduce the contents and their principles, which comprise three main subjects: technique, knowledge, and experience...
March 2017: Gastric Cancer
https://www.readbyqxmd.com/read/27977890/scissor-type-knife-significantly-improves-self-completion-rate-of-colorectal-endoscopic-submucosal-dissection-single-center-prospective-randomized-trial
#16
Takeshi Yamashina, Yoji Takeuchi, Kengo Nagai, Noriko Matsuura, Takashi Ito, Mototsugu Fujii, Noboru Hanaoka, Koji Higashino, Noriya Uedo, Ryu Ishihara, Hiroyasu Iishi
BACKGROUND AND AIM: Colorectal endoscopic submucosal dissection (C-ESD) is recognized as a difficult procedure. Recently, scissors-type knives were launched to reduce the difficulty of C-ESD. The aim of this study was to evaluate the efficacy and safety of the combined use of a scissors-type knife and a needle-type knife with a water-jet function (WJ needle-knife) for C-ESD compared with using the WJ needle-knife alone. METHODS: This was a prospective randomized controlled trial in a referral center...
May 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/27938786/surveillance-of-patients-with-gastric-precancerous-conditions
#17
REVIEW
Jorge Lage, Noriya Uedo, Mário Dinis-Ribeiro, Kenshi Yao
Intestinal-type gastric adenocarcinoma arises from a multistep process starting with Helicobacter pylori infection followed by gastric atrophy, gastric intestinal metaplasia and dysplasia. Indeed, patients with gastric precancerous conditions or lesions (GPC) are at increased risk to develop gastric cancer even in regions with low incidence. Thus, the identification and surveillance of a high risk subgroup could lead to the diagnosis of cancer at early stage and improve survival. However, both endoscopic and histological accuracy and interobserver agreement in the diagnosis of GPC are still far from optimal...
December 2016: Best Practice & Research. Clinical Gastroenterology
https://www.readbyqxmd.com/read/27807641/long-term-outcomes-of-endoscopic-submucosal-dissection-for-early-gastric-cancer-a-multicenter-collaborative-study
#18
MULTICENTER STUDY
Satoshi Tanabe, Kenji Ishido, Takayuki Matsumoto, Takashi Kosaka, Ichiro Oda, Haruhisa Suzuki, Junko Fujisaki, Hiroyuki Ono, Noboru Kawata, Tsuneo Oyama, Akiko Takahashi, Hisashi Doyama, Masaaki Kobayashi, Noriya Uedo, Kenta Hamada, Takashi Toyonaga, Fumiaki Kawara, Shinji Tanaka, Yoshikazu Yoshifuku
OBJECTIVE: The indications for endoscopic submucosal dissection (ESD) in patients with early gastric cancer (EGC) have been expanded. However, the long-term outcomes of ESD remain unclear. We retrospectively investigated the long-term outcomes of ESD in patients with EGC. METHODS: We retrospectively studied patients with EGC who underwent ESD at 11 institutions between January 2003 and December 2010. A total of 6456 patients (7979 lesions) who met the absolute indications for ESD and 4202 patients (5781 lesions) who met the expanded indications for ESD were studied...
March 2017: Gastric Cancer
https://www.readbyqxmd.com/read/27747281/first-reports-of-esophageal-adenocarcinoma-with-white-globe-appearance-in-japanese-and-caucasian-patients
#19
Yusuke Tonai, Ryu Ishihara, Yasushi Yamasaki, Takashi Kanesaka, Sachiko Yamamoto, Tomofumi Akasaka, Noboru Hanaoka, Yoji Takeuchi, Koji Higashino, Noriya Uedo, Yasuhiko Tomita, Hiroyasu Iishi
Background and study aims: Better endoscopic diagnosis in case of Barrett's esophagus is still needed. White globe appearance (WGA) is a novel endoscopic marker for gastric adenocarcinoma, with high sensitivity for differentiating between gastric cancer/high-grade dysplasia and other lesions. We report 2 cases of esophageal adenocarcinoma with WGA. In Case 1, esophagogastroduodenoscopy (EGD) revealed a 10-mm esophageal adenocarcinoma in a 48-year-old Japanese woman with short-segment Barrett's esophagus. A small (< 1 mm) white globular lesion, typical of WGA, was observed under the epithelium by magnifying narrow-band imaging...
October 2016: Endoscopy International Open
https://www.readbyqxmd.com/read/27708526/endoscopic-submucosal-dissection-for-anal-intraepithelial-neoplasia
#20
Junichi Miyazaki, Noriya Uedo, Zhao Liang Li, Shohei Matsuo
No abstract text is available yet for this article.
October 2016: Annals of Gastroenterology: Quarterly Publication of the Hellenic Society of Gastroenterology
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