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The Significance of Type B2 Vessels by the Japan Esophageal Society Classification of NBI Magnifying Endoscopy for the Diagnosis of Invasion Depth of Superficial Esophageal Squamous Cell Carcinoma Manabu Takeuchi 1,2 , Yukari Mori 2 , Satoru Hashimoto 2 , Yoichi Ajioka 3 , Syuji Terai 2 1Department of Gastroenterology, Nagaoka Red Cross Hospital, Niigata, Japan 2Department of Gastroenterology, Niigata University, Graduate School of Medical and Dental Sciences, Niigata, Japan 3Division of Molecular and Diagnostic Pathology, Niigata University, Graduate School of Medical and Dental Sciences, Niigata, Japan Keyword: 日本食道学会拡大内視鏡分類 , B2血管 , 食道癌 , 深達度 pp.1343-1352
Published Date 2018/9/25
DOI https://doi.org/10.11477/mf.1403201477
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 The simplicity of the new magnifying endoscopic classification of the Japan Esophageal Society makes it the most useful diagnostic classification. However, despite the high diagnostic accuracy by Type B1 vessels,the distinction of Type B2 vessels using this diagnostic classification is slightly difficult. Typically, the tumor depth of lesions with Type B2 vessels exists widely from T1a-LPM to T1b-SM2, with particularly high ratio of lesions indicating T1b-SM2 cancer ; besides, there are many cases which are under diagnosis. Thus, this study focused on domain characteristics of Type B2 vessels and examined a correlation between the long axis and invasion depth. Compared with T1a-LPM cancer(5mm)and T1a-MM/T1b-SM1 cancer(4mm), the invasion depth of Type B2 vessels was 10mm, with a significant domain longer axis median in T1b-SM2. We classified Type B2 vessels domains in the mixed type in which Type B1 vessels were mixed with the pure type comprising only Type B2 vessels. Furthermore, Type B2 vessels' domain longer axis of T1b-SM2 cancer was considerably more than that of T1a-LPM and T1a-MM/T1b-SM1 cancer. Perhaps, the incorporation of the domain characteristics of Type B2 vessels in the diagnostic classification to enhance the diagnostic precision could be useful in future as evident from the remarkable results of the pure type in several facilities.


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

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