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Laterally Spreading Tumor: Diagnosis and Significance: A View from Image-Enhanced Endoscopy with Magnification Yasuhiko Maeyama 1,2 , Osamu Tsuruta 1,2 , Tetsuhiro Noda 1,2 , Shuichiro Nagata 1,2 , Hikaru Yoshida 1,2 , Michita Mukasa 1,2 , Hiroaki Sumie 1,2 , Hiroshi Kawano 3 , Keiichi Mitsuyama 1,2 , Takuji Torimura 1,2 1Division of Gastroenterology, Department of Medicine, Kurume University, Kurume, Japan 2Division of GI Endoscopy, Department of Medicine, Kurume University, Kurume, Japan 3Division of Gastroenterology, St.marry's Hospital, Kurume, Japan Keyword: 側方発育型腫瘍 , LST , 顆粒型 , 非顆粒型 , pit pattern pp.1685-1692
Published Date 2014/11/25
DOI https://doi.org/10.11477/mf.1403200048

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 We retrospectively analyzed the epidemiological data of LST(laterally spreading tumor), which was macroscopically divided into the following subtypes : LST-G-H, LST-G-M, LST-NG-FE, and LST-NG-PD. In addition, we investigated the relationship between macroscopic and histologic features and the pit pattern of these lesions to differentially diagnose adenoma and LST cancer and to determine the depth of tumor invasion in LST using pit patterns.

 Macroscopic assessment showed that Type III/IV pit patterns mainly constitute the granular and non-granular subtypes of LSTs. The lesion that showed VN type of pit pattern was observed in all cases of pT1b cancer. However, the lesion that showed the VI type pit pattern was differentially diagnosed as SM cancer instead of adenoma, based on the observation intramucosal carcinoma. A tendency to read an atypical degree highly was observed in the quality diagnosis ability using pit patterns. A tendency to read the depth of tumor invasion deeply was observed in the diagnosis ability of the depth of tumor invasion using pit patterns.


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

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