Magnifying Endoscopic Diagnosis of Middle and Hypopharyngeal Lesions: Particularly Focusing on Differential Diagnosis Haruhiro Inoue 1 , Toshihisa Hosoya 1 , Haruo Ikeda 1 , Manabu Onimaru 1 , Akira Yoshida 1 , Makoto Kaga 1 , Yoshitaka Sato 1 , Michitaka Suzuki 1 , Noriko Odaka 1 , Hitoshi Satodate 1 , Hiroaki Ito 1 , Shin-ei Kudo 1 1Digestive Disease Center, Showa University Northern Yokohama Hospital, Yokohama, Japan Keyword: NBI , IPCL , 乳頭腫 , 上皮内腫瘍 , 咽頭癌 pp.337-348
Published Date 2012/3/25
DOI https://doi.org/10.11477/mf.1403113124
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 Superficial cancer in the middle and hypopharynx can be detected by careful observation. It is impossible to spray iodine solution in the pharynx because it irritates the larynx, so NBI(narrow band imaging)becomes the key tool to identify flat lesions in the pharynx. After detecting a brownish area in the pharynx, NBI magnifying observation facilitates the evaluation of IPCL(intra-epithelial papillary capillary loop)pattern changes. An importanat differential diagnosis in the pharynx is squamous cell papilloma. Papillomatous lesions are easily diagnosed as squamous cell papilloma by typical endoscopic findings, but in flat lesions endoscopic diagnosis often becomes difficult.

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