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Gastric Methotrexate-associated Lymphoproliferative Disease:A Case Report Given the Differential Diagnosis of Gastric Cancer Daisuke Yoshimura 1 , Chikako Yoshitake 1 , Naohiko Harada 1 , Hirotaka Tsuru 1 , Hitoshi Honma 1 , Akito Okubo 1 , Hiroki Fukuya 1 , Shuichi Itonaga 1 , Taisuke Sasaki 1 , Shohei Hamada 1 , Minako Fujiwara 2 , Seiya Momosaki 2 1Division of Gastroenterology, National Hospital Organization Kyushu Medical Center, Fukuoka, Japan 2Division of Pathology, National Hospital Organization Kyushu Medical Center, Fukuoka, Japan Keyword: メトトレキサート関連リンパ増殖性疾患 , MTX-LPD , びまん性大細胞型B細胞リンパ腫 , 胃癌 pp.910-914
Published Date 2023/7/25
DOI https://doi.org/10.11477/mf.1403203275
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 A 70s female patient was referred to our hospital for epigastralgia. She had been taking MTX(methotrexate)for rheumatoid arthritis for 14 years. Upper gastrointestinal endoscopy revealed an extensive ulcerative lesion on the lesser curvature to the posterior wall of the gastric angle and antrum.

 The lesion was thick and covered with uneven whitish inflammatory exudates, with no irregular margins suggestive of an epithelial lesion. An ulcer margin biopsy revealed a dense proliferation of atypical medium- to large-sized lymphocytes in the mucosal lamina propria, and immunohistochemical staining revealed diffuse CD20- and Ki-67-positive cells. MTX discontinuation resulted in rapid endoscopic regression of the lesion and subsequent scarring, leading to MTX-associated lymphoproliferative disease diagnosis.


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

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