Clinical Endoscopy

Review

Detecting colorectal lesions with image-enhanced endoscopy: an updated review from clinical trials: Mizuki Nagai, Sho Suzuki, Yohei Minato, Fumiaki Ishibashi, Kentaro Mochida, Ken Ohata, Tetsuo Morishita; Clin Endosc 2023;56(5):553-562. Published online July 26, 2023; DOI: https://doi.org/10.5946/ce.2023.055

Colonoscopy plays an important role in reducing the incidence and mortality of colorectal cancer by detecting adenomas and other precancerous lesions. Image-enhanced endoscopy (IEE) increases lesion visibility by enhancing the microstructure, blood vessels, and mucosal surface color, resulting in the detection of colorectal lesions. In recent years, various IEE techniques have been used in clinical practice, each with its unique characteristics. Numerous studies have reported the effectiveness of IEE in the detection of colorectal lesions. IEEs can be divided into two broad categories according to the nature of the image: images constructed using narrowband wavelength light, such as narrowband imaging and blue laser imaging/blue light imaging, or color images based on white light, such as linked color imaging, texture and color enhancement imaging, and i-scan. Conversely, artificial intelligence (AI) systems, such as computer-aided diagnosis systems, have recently been developed to assist endoscopists in detecting colorectal lesions during colonoscopy. To better understand the features of each IEE, this review presents the effectiveness of each type of IEE and their combination with AI for colorectal lesion detection by referencing the latest research data.

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Original Articles

Exploring quality indicators for the detection of Helicobacter pylori-naïve gastric cancer: a cross-sectional nationwide survey: Fumiaki Ishibashi, Toshiaki Hirasawa, Hiroya Ueyama, Yohei Minato, Sho Suzuki; Clin Endosc 2023;56(4):460-469. Published online April 4, 2023; DOI: https://doi.org/10.5946/ce.2022.167

Graphical Abstract Abstract PDF Supplementary Material PubReader ePub

Background
/Aims: Diagnosis of Helicobacter pylori-naïve gastric cancer (HPNGC) is becoming increasingly important. This study aimed to explore the quality indicators for HPNGC detection.
Methods
We conducted a cross-sectional, nationwide, web-based survey of gastrointestinal endoscopists in Japan. In addition to questions about the number of HPNGC cases detected in a year and basic information, the questionnaire also consisted of 28 questions: (1) 18 about HPNGC awareness, (2) six about diagnostic proactiveness, and (3) four about interest in HPNGC.
Results
Valid responses were obtained from 712 endoscopists. The Japan Gastroenterological Endoscopy Society-certified endoscopists had a significantly higher HPNGC detection rate than the nonspecialists (0.42% vs. 0.32%, respectively; p=0.008). The results of the multiple regression analysis showed that Japan Gastroenterological Endoscopy Society certification and high awareness and interest scores were independent predictors of the HPNGC detection rate (p=0.012, p<0.001, p=0.024, respectively). Principal component analysis showed that the endoscopists who attended conferences for collecting information on HPNGC had a higher level of awareness.
Conclusions
To improve the detection of HPNGC, it is necessary to increase the awareness of the disease. It is hoped that relevant societies will play an important role in endoscopists’ education.

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A mathematical simulation model to determine the optimal endoscopic screening strategy for detection of H. pylori-naïve gastric neoplasms
Fumiaki Ishibashi, Kosuke Okusa, Yoshitaka Tokai, Toshiaki Hirasawa, Tomohiro Kawakami, Kentaro Mochida, Yuka Yanai, Chizu Yokoi, Yuko Hayashi, Shun-ichiro Ozawa, Koji Uraushihara, Yohei Minato, Hiroyuki Nakanishi, Hiroya Ueyama, Mikinori Kataoka, Yuzo To
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Improving the quality of the esophagogastroduodenoscopy in Helicobacter pylori-naïve gastric cancer
Jae Myung Park
Clinical Endoscopy.2023; 56(4): 453. CrossRef

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Quality Indicators for the Detection of Helicobacter pylori-Negative Early Gastric Cancer: A Retrospective Observational Study: Fumiaki Ishibashi, Konomi Kobayashi, Keita Fukushima, Ryu Tanaka, Tomohiro Kawakami, Junko Kato, Kazuaki Sugihara; Clin Endosc 2020;53(6):698-704. Published online March 13, 2020; DOI: https://doi.org/10.5946/ce.2019.203

Abstract PDF PubReader ePub

Background
/Aims: While Helicobacter pylori (HP)-negative gastric cancer is frequently reported, little is known about the predictors for detecting HP-negative early gastric cancer (EGC). We aimed to evaluate the predictors for the detection of HP-negative EGC.
Methods
We retrospectively reviewed 13,477 consecutive asymptomatic cases where upper endoscopy was performed by nine physicians from April 2017 to March 2019 and analyzed the detection rate of high-risk lesions (HRLs), including EGC, tubular adenoma, and lymphoma, according to the status of HP infection. The observation time was corrected for multiple regression analyses.
Results
For all physicians, the average observation time for screening HP-eradicated and -naïve patients was shorter than that for screening HP-positive patients (p<0.05). Multiple regression analyses revealed that the observation time in the three groups was an independent predictor for detecting HRLs in HP-eradicated patients (p=0.03106, 0.01263, and 0.02485, respectively), while experience of endoscopy was an independent predictor for detecting HRLs in HP-naïve patients (p=0.02638).
Conclusions
While observation time during screening endoscopy was a quality indicator for detecting HRLs in HP-eradicated patients, experience of endoscopy was a quality indicator for detecting HRLs in HP-naïve patients.

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Gastric Cancer.2024; 27(5): 1078. CrossRef
Exploring quality indicators for the detection of Helicobacter pylori-naïve gastric cancer: a cross-sectional nationwide survey
Fumiaki Ishibashi, Toshiaki Hirasawa, Hiroya Ueyama, Yohei Minato, Sho Suzuki
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A Close Follow-Up Strategy in the Short Period of Time after Helicobacter pylori Eradication Contributes to Earlier Detection of Gastric Cancer
Fumiaki Ishibashi, Sho Suzuki, Mizuki Nagai, Kentaro Mochida, Konomi Kobayashi, Tetsuo Morishita
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Quality management system for screening esophagogastroduodenoscopy improves detection of Helicobacter pylori-negative interval gastric cancer
Fumiaki Ishibashi, Konomi Kobayashi, Tomohiro Kawakami, Ryu Tanaka, Kazuaki Sugihara, Satoshi Baba
Endoscopy International Open.2021; 09(12): E1900. CrossRef
Quality Indicator for Gastric Cancer Detection Based on Helicobacter pylori Status
Jae Myung Park
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6,148 View
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