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Esophagogastroduodenoscopy showed multiple granular elevations in the gastric body. After biopsies from the elevations, she was diagnosed with mucosa-associated lymphoid tissue (MALT) lymphoma. Polymerase chain reaction also detected <jats:italic>Helicobacter pylori<\/jats:italic> and <jats:italic>H. suis<\/jats:italic>. Treatment to eradicate <jats:italic>H. pylori and H. suis<\/jats:italic> was successful. Endoscopic examination after the bacterial eradication treatment showed that multiple granular elevations remained in the gastric body; however, no lymphoma cells were found during histopathological examination. Thus, we reported a case of <jats:italic>H. pylori<\/jats:italic>-positive gastric MALT lymphoma with a unique morphology associated with <jats:italic>H. suis<\/jats:italic> superinfection<jats:italic>.<\/jats:italic><\/jats:p>","DOI":"10.1007\/s12328-020-01310-5","type":"journal-article","created":{"date-parts":[[2021,1,4]],"date-time":"2021-01-04T01:02:22Z","timestamp":1609722142000},"page":"478-483","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Gastric mucosa-associated lymphoid tissue lymphoma in conjunction with multiple lymphomatous polyposis in the context of Helicobacter pylori and Helicobacter suis superinfection"],"prefix":"10.1007","volume":"14","author":[{"given":"Toshikatsu","family":"Naito","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ryo","family":"Yuge","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shinji","family":"Tanaka","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rina","family":"Otani","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroki","family":"Kadota","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hidehiko","family":"Takigawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tadamasa","family":"Tamura","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kazuhiro","family":"Sentani","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wataru","family":"Yasui","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yasuhiko","family":"Kitadai","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kazuaki","family":"Chayama","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2021,1,4]]},"reference":[{"key":"1310_CR1","doi-asserted-by":"publisher","first-page":"1267","DOI":"10.1056\/NEJM199405053301803","volume":"330","author":"J Parsonnet","year":"1994","unstructured":"Parsonnet J, Hansen S, Rodriguez L, et al. 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