Endoscopic Diagnosis of Non-neoplastic Duodenal Protuberant Lesions Shigetsugu Tsuji 1 , Kazuyoshi Katayanagi 2 , Hiroshi Minato 2 , Kenkei Hasatani 3 , Yasuharu Kaizaki 4 , Hisashi Doyama 1 1Department of Gastroenterology, Ishikawa Prefectural Central Hospital, Kanazawa, Japan 2Department of Diagnostic Pathology, Ishikawa Prefectural Central Hospital, Kanazawa, Japan 3Department of Gastroenterology, Fukui Prefectural Hospital, Fukui, Japan 4Department of Pathology, Fukui Prefectural Hospital, Fukui, Japan Keyword: 十二指腸 , 非腫瘍性ポリープ , 腫瘍様病変 , NBI併用拡大内視鏡 , 隆起性病変 pp.841-851
Published Date 2021/5/25
DOI https://doi.org/10.11477/mf.1403202471
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 Non-neoplastic protuberant lesions in the duodenum have a wide variety of morphologies ; therefore, accurate diagnosis is challenging only on the basis of conventional endoscopic features. In recent years, tumor-like lesions have gained attention as a precursor lesion of adenocarcinoma or as a lesion where a gastric-type tumor originates. Here, we review the endoscopic findings, including magnifying endoscopy with narrow-band imaging for non-neoplastic protuberant lesions, such as gastric metaplasia, foveolar epithelial type of hyperplastic polyps, mucosubmucosal elongated polyp, lymphangioma, Peutz-Jeghers type polyp, and heterotopic pancreas in addition to Brunner's gland hyperplasia and heterotopic gastric mucosa that are most commonly identified in the duodenum. Comprehensive information about the characteristics of non-neoplastic protuberant lesions is essential for differential diagnosis.

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