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Essential knowledge of inspection techniques in colonoscopy Toshio Kuwai 1 , Takuro Hamada 2 , Masachika Saino 2 , Shin Morimoto 2 , Fumiaki Tanino 2 , Hidenori Tanaka 2 , Ken Yamashita 2 , Yoshihiro Kishida 2 , Shiro Oka 2 1Gastrointestinal Endoscopy and Medicine, Hiroshima University Hospital, Hiroshima, Japan 2Department of Gastroenterology, Hiroshima University Hospital, Hiroshima, Japan Keyword: chromoendoscopy , magnifying endoscopy , image-enhanced endoscopy pp.285-294
Published Date 2025/3/25
DOI https://doi.org/10.24479/endo.0000001896
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 The quality of colonoscopy depends not only on the insertion technique of the endoscopist but also on the observation technique. This article outlines the essential knowledge needed to understand conventional, image-enhanced, and magnified colonoscopy.During conventional endoscopic observation for lesion detection, careful and thorough examination of the intestinal tract is crucial to avoid missing lesions. Key factors include adequate bowel cleansing, sufficient observation time, proper scope manipulation, and appropriate adjustment of insufflation volume. Certain anatomical areas may be more challenging to observe and should receive particular attention.Once a lesion is identified, initial observation is performed using conventional white light, followed by NBI magnification. Diagnosis is based on the JNET classification, where types 1, 2A, and 3 demonstrate high specificity. Treatment plans are determined accordingly: follow-up for type 1, endoscopic resection for type 2A, and surgical resection for type 3. Conversely, type 2B includes adenoma to SM deep invasive carcinoma, requiring a more comprehensive decision-making process, potentially involving further evaluation, such as pit pattern diagnosis with magnifying colonoscopy using crystal violet staining.


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電子版ISSN 印刷版ISSN 0915-3217 東京医学社

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