Clinical Endoscopy

Yoshikazu Hayashi

3 Articles

Underwater Endoscopic Mucosal Resection without Submucosal Injection Facilitates En bloc Resection of Colon Adenomas Extending into a Diverticulum: Yoshikazu Hayashi, Masahiro Okada, Takaaki Morikawa, Tatsuma Nomura, Hisashi Fukuda, Takahito Takezawa, Alan Kawarai Lefor, Hironori Yamamoto; Clin Endosc 2021;54(3):436-440. Published online November 6, 2020; DOI: https://doi.org/10.5946/ce.2020.168

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Superficial colonic neoplasms sometimes extend into a diverticulum. Conventional endoscopic mucosal resection of these lesions is considered challenging because colonic diverticula do not have a muscularis propria and are deeply inverted. Even if the solution is carefully injected below the mucosa at the bottom of the diverticulum, the mucosa is rarely elevated from the diverticular orifice, and it is usually just narrowed. Although endoscopic submucosal dissection or full-thickness resection with an over-the-scope clip device enables the complete resection of these lesions, it is still challenging, time consuming and expensive. Underwater endoscopic mucosal resection without submucosal injection (UEMR) is an innovative technique enabling en bloc resection of superficial colon lesions. We report three patients with colon adenomas extending into a diverticulum treated with successful UEMR. UEMR enabled rapid and safe en bloc resection of colon lesions extending into a diverticulum.

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Underwater endoscopic mucosal resection for colorectal lesions: Can it be an “Underwater” revolution?
Yoji Takeuchi, Satoki Shichijo, Noriya Uedo, Ryu Ishihara
DEN Open.2022;[Epub] CrossRef

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Advanced Treatment and Imaging in Colonoscopy: The Pocket-Creation Method for Complete Resection and Linked Color Imaging for Better Detection of Early Neoplastic Lesions by Colonoscopy: Hironori Yamamoto, Satoshi Shinozaki, Yoshikazu Hayashi, Yoshimasa Miura, Tsevelnorov Khurelbaatar, Hiroyuki Osawa, Alan Kawarai Lefor; Clin Endosc 2019;52(2):107-113. Published online January 10, 2019; DOI: https://doi.org/10.5946/ce.2018.189

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Early detection and resection of neoplastic lesions are key objectives to diminish colorectal cancer mortality. Resection of superficial colorectal neoplasms, cold snare polypectomy, endoscopic mucosal resection, and endoscopic submucosal dissection have all been developed and used worldwide. The pocket-creation method facilitates the resection of tumors in difficult and routine locations. Early detection is the most important first step to maximize the benefits of recent advancements in endoscopic techniques. However, the detection of small, flat-shaped, or faded color lesions remains difficult. Linked color imaging, a novel multi-light technology, facilitates the recognition of minor differences in tissue by enhancing the color contrast between early colorectal neoplasms and surrounding normal mucosa in a bright field of view. The most striking feature of linked color imaging is its ability to display the color of early neoplastic lesions as distinct from inflammatory changes, both of which have similar “redness” when viewed using white light imaging. To increase the detection rate of neoplasms, linked color imaging should be used from the outset for endoscopic observation. Early detection of superficial colorectal tumors can result in decreased mortality from colorectal cancer and maintain a good quality of life for patients.

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Comparison of blue laser imaging and light‐emitting diode‐blue light imaging for the characterization of colorectal polyps using the Japan narrow‐band imaging expert team classification: The LASEREO and ELUXEO COLonoscopic study
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DEN Open.2024;[Epub] CrossRef
Linked color imaging versus white light imaging in the diagnosis of colorectal lesions: a meta-analysis of randomized controlled trials
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The Pocket-Creation Method Facilitates Endoscopic Submucosal Dissection of Gastric Neoplasms Along the Lesser Curvature at the Gastric Angle
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Frontiers in Medicine.2022;[Epub] CrossRef
Development and validation of the linked color imaging classification for endoscopic prediction of colorectal polyp histology
Min Min, Shou Bin Ning, Duan Min Hu, Yoshikazu Hayashi, Yan Liu
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Colon polyp detection using linked color imaging compared to white light imaging: Systematic review and meta‐analysis
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Linked color imaging for the detection of early gastrointestinal neoplasms
Satoshi Shinozaki, Hiroyuki Osawa, Yoshikazu Hayashi, Alan Kawarai Lefor, Hironori Yamamoto
Therapeutic Advances in Gastroenterology.2019;[Epub] CrossRef

6,939 View
218 Download
11 Web of Science
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Laterally Spreading Tumor of the Rectum Delineated with Linked Color Imaging Technology: Masahiro Okada, Hirotsugu Sakamoto, Takahito Takezawa, Yoshikazu Hayashi, Keijiro Sunada, Alan K. Lefor, Hironori Yamamoto; Clin Endosc 2016;49(2):207-208. Published online February 12, 2016; DOI: https://doi.org/10.5946/ce.2015.077

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Practical utility of linked color imaging in colonoscopy: Updated literature review
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Linked color imaging and upper gastrointestinal neoplasia
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Improvement of detection sensitivity of upper gastrointestinal epithelial neoplasia in linked color imaging based on data of eye tracking
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Efficacy of image-enhanced endoscopy for colorectal adenoma detection: A multicenter, randomized trial
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Using the string‐clip method to retrieve the resected specimen allowed a clear observation of the colon and detection of a new lesion
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Digestive Endoscopy.2022;[Epub] CrossRef
Linked color imaging improves identification of early gastric cancer lesions by expert and non-expert endoscopists
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Diagnostic accuracy of linked colour imaging versus white light imaging for early gastric cancers: a prospective, multicentre, randomized controlled trial study
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A case of Cronkhite–Canada syndrome with repeated linked color imaging observation of the subepithelial capillary network in the colon
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Linked color imaging improves visibility of colorectal serrated lesion by high color contrast to surrounding mucosa
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Colon polyp detection using linked color imaging compared to white light imaging: Systematic review and meta‐analysis
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Advanced Treatment and Imaging in Colonoscopy: The Pocket-Creation Method for Complete Resection and Linked Color Imaging for Better Detection of Early Neoplastic Lesions by Colonoscopy
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Linked color imaging for the detection of early gastrointestinal neoplasms
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Evaluation of the impact of linked color imaging for improving the visibility of colonic polyp
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