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Localisation in the small intestine often appears as surgical urgency, due to the development of an intestinal obstruction or enterorrhagia. We present two cases of extranodal diffuse large B-cell lymphoma localisation, presented as a secondary lesion localised in the first one in the stomach, and in the second one in the first duodenal portion.<\/jats:p>","DOI":"10.1136\/bcr-2021-247607","type":"journal-article","created":{"date-parts":[[2022,5,18]],"date-time":"2022-05-18T11:40:20Z","timestamp":1652874020000},"page":"e247607","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":2,"title":["Two secondary localisation of non-Hodgkin\u2019s lymphomas in the upper gastrointestinal tract"],"prefix":"10.1136","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5426-5985","authenticated-orcid":false,"given":"Natale","family":"Calomino","sequence":"first","affiliation":[{"name":"Department of Medicine, Surgery and Neuroscience, University of SIena, Siena, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Daniele","family":"Fusario","sequence":"additional","affiliation":[{"name":"Department of Medicine, Surgery and Neuroscience, University of SIena, Siena, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Emanuele","family":"Cencini","sequence":"additional","affiliation":[{"name":"Unit of Hematology, Azienda Ospedaliera Universitaria Senese, Siena, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stefano","family":"Lazzi","sequence":"additional","affiliation":[{"name":"Department of Medical Biotechnologies, University of Siena, Siena, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2022,5,18]]},"reference":[{"key":"2025082700013605000_15.5.e247607.1","first-page":"329","article-title":"Non-Hodgkin's lymphoma in the gluteal region: a case report","volume":"89","author":"De Giorgi","year":"2004","journal-title":"Chir Organi Mov"},{"key":"2025082700013605000_15.5.e247607.2","unstructured":"Belaabidia B , Sellami S , Hamdaoui R . 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