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Clinical Characteristics of H. pylori Eradication Resistant Gastric MALT Lymphoma with Special Reference to Rentogenographic, Endoscopic and EUS Findings Tsuneya Nakamura 1 , Masahiro Tajika 1 , Hiroki Kawai 1 , Masao Seto 2 , Takio Yokoi 3 , Yasushi Yatabe 3 , Shigeo Nakamura 4 1Department of Endoscopy, Aichi Cancer Center Hospital, Nagoya, Japan 2Division of Molecular Medicine, Aichi Cancer Center Research Institute, Nagoya, Japan 3Department of Pathology and Molecular Diagnosis, Aichi Cancer Center Hospital, Nagoya, Japan 4Department of Pathology and Clinical Laboratories, Nagoya University Hospital, Nagoya, Japan Keyword: 胃MALTリンパ腫 , API2-MALT1 , H. pylori , 除菌療法不応例 pp.1198-1206
Published Date 2007/7/25
DOI https://doi.org/10.11477/mf.1403101151

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 Clinicopathologic characteristics of H. pylori eradication resistant gastric MALT lymphoma are not well clarified. We analyzed a consecutive series of gastric MALT lymphoma at our institution with special reference to rentogenographic, endoscopic and EUS findings. Subjects were 92 consecutive patients with gastric MALT lymphoma. Gastric MALT lymphoma was classified into three groups: responders without API2-MALT1 (group A), non-responders without API2-MALT1 (group B) and non-responders with API2-MALT1 (group C). Clinicopathologic features of each group can be summarized as follows. Group A: H. pylori-positive, no invasion beyond the submucosa, clinical stage I, and macroscopic ulceration and early gastric cancer-like appearance. Group B: H. pylori-negative, invasion to the proper muscle layer or deeper, lymph node metastases, clinical stage II1 or higher, and protruding lesion. Group C: Male preponderance, H. pylori-negative, absence of DLBCL component, and cobblestone-like mucosa. According to multivariate analysis, predictive factors of a non-responder were II1 or more in clinical stage, positive API2-MALT1, positive H. pylori, proper muscle or more in depth of invasion, protruded lesion and cobblestone mucosa. For non-responsive cases, second-line treatments resulted in complete response (CR). However, careful observation for development of gastric carcinoma and disease progression is essential during follow-up of API2-MALT1 positive gastric MALT lymphoma when patients refuse second-line treatment.


Copyright © 2007, 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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