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Endoscopic Diagnosis for Superficial Esophageal Cancer Using Transnasal Esophagogastroduodenoscopy Kenro Kawada 1 , Tatsuyuki Kawano 1 , Kagami Nagai 1 , Tetsuro Nishikage 1 , Yasuaki Nakajima 1 , Tomoyoshi Suzuki 1 , Jirawatt Swangsri 1 , Akihiro Hoshino 1 , Yutaka Miyawaki 1 , Takuya Okada 1 , Shunsuke Ohta 1 , Hiroshi Kawachi 2 , Taro Sugimoto 3 1Division of Esophageal and General Surgery, Tokyo Medical and Dental University, Tokyo 2Division of Pathology, Tokyo Medical and Dental University, Tokyo 3Division of Head and Neck Surgery, Tokyo Medical and Dental University, Tokyo Keyword: 食道表在癌 , 経鼻内視鏡 , FICE , Valsalva法 pp.601-610
Published Date 2011/5/24
DOI https://doi.org/10.11477/mf.1403102220
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 Transnasal EGD(esophagogastroduodenoscopy)can be performed comfortably because of its attenuation of the gag reflex. However, it has some disadvantages compared with conventional endoscopy such as brightness, image solution, and suction ability, so its diagnostic abilities have not been sufficiently evaluated. The procedure has been making tremendous progress, and a new endoscope(model EG-530NW, FUJI film, Tokyo, Japan)has been manufactured beginning in July, 2009. The endoscope is a transnasal endoscope that provides high quality endoscopic images with a wide field view of 140°with the FICE system. The postcricoid subsite of the hypopharynx and UOS(upper oesophageal sphincter)is difficult to visualize on conventional EGD, but the Valsalva maneuver with flexible otorhinolaryngoscopy has been shown to improve their visualization. The use of the Valsalva maneuver with transnasal EGD results in postcricoid and UOS visualization in 64%(50/78)of cases. The new transnasal EGD(EG-530NW)also improves the visualization of the hypopharynx and UOS, which is not possible using conventional EGD. We report here the results of our investigation of the diagnostic accuracy of synchronous or metachronous esophageal cancers in 170 patients with esophageal cancer or head and neck cancer. A total of 14 superficial esophageal cancers were found in 11 patients(6.5%)by transnasal EGD. All of these were detected without submucosal invasion. The technique used for observing the esophagus with a good field of vision is able to expand the esophagus, and if abnormal findings are observed, then it is better to approach and carefully reach the lesion, and then effectively use the FICE system. Transnasal EGD may therefore become the standard examination modality for screening the upper gastrointestinal tract in the future.


Copyright © 2011, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1219 印刷版ISSN 0536-2180 医学書院

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