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- W1578924265 abstract "Colorectal cancer (CRC) can be prevented by the removal of precancerous lesions. A previous study has suggested that colonoscopic polypectomy is responsible for a 53% reduction in CRC mortality.1 However, a considerable number of adenomatous polyps that may develop into invasive cancer are missed during colonoscopy.2 The use of a narrow band imaging (NBI) system, developed by Olympus Medical Systems (Olympus Co., Tokyo, Japan), has been discussed as a modality that could potentially improve the detection of colorectal adenomas. However, first-generation NBI systems did not increase adenoma or polyp detection rates.3 New-generation NBI systems with a brighter light source were launched in 2012 and were expected to increase the adenoma or polyp detection rates.4 Herein, we report a patient with a laterally spreading tumor (LST) that was visualized using this new-generation NBI system. A 63-year-old woman with a family history of CRC and a prior polypectomy underwent surveillance colonoscopy. Initially, the colonoscope (Olympus PCF-H290I with EVIS LUCERA ELITE system) was advanced up to the cecum without detailed observation. As we withdrew the colonoscope using white light, we detected an irregular fold in the transverse colon (Fig. 1). Upon switching from white light to NBI, we clearly observed an approximately 20-mm brownish area (Fig. 2). Using the electronic magnification function, we observed a regular surface pattern indicative of an adenoma with low-grade dysplasia. En-bloc endoscopic mucosal resection was done and a diagnosis of adenoma with low-grade dysplasia was confirmed histopathologically. An irregular fold was detected in the transverse colon. We clearly observed an approximately 20-mm brownish area using the new-generation narrow band imaging system. Non-polypoid lesions, including LST, are difficult to detect with white light optical colonoscopy because of their flat surfaces. However, studies have shown that these types of tumor account for a considerable number of advanced colonic tumors.5 This new-generation NBI system offers promise for the detection of non-polypoid colorectal lesions including LST. Authors declare no conflict of interests for this article." @default.
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- W1578924265 date "2015-04-01" @default.
- W1578924265 modified "2023-10-14" @default.
- W1578924265 title "New-generation narrow band imaging system for detection of a laterally spreading tumor in the colon" @default.
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- W1578924265 doi "https://doi.org/10.1111/den.12416" @default.
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