{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,10]],"date-time":"2026-04-10T03:21:43Z","timestamp":1775791303497,"version":"3.50.1"},"reference-count":5,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2023,2,22]],"date-time":"2023-02-22T00:00:00Z","timestamp":1677024000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Respirology Case Reports"],"published-print":{"date-parts":[[2023,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Primary pulmonary diffuse large B\u2010cell lymphoma is a rare entity. We describe a case of pulmonary lymphoma with multiple nodules mimicking metastases in a\u00a0treated patient with rheumatoid arthritis. A 73\u2010year\u2010old man was diagnosed with rheumatoid arthritis at the age of 30. He was treated with leflunomide. He was followed up for a nontuberculous mycobacterial infection. He underwent percutaneous coronary intervention for acute myocardial infarction at the age of 70. In April 2022, routine follow\u2010up revealed new\u2010onset multiple nodules on chest computed tomography (CT). A position emission tomography\/CT scan with 18F\u2010fluorodeoxyglucose showed a low\u2010high maximum standardized uptake value by multiple nodules. Pathologic examination of a video\u2010assisted thoracic surgical biopsy revealed pulmonary diffuse large B\u2010cell lymphoma. Systemic chemotherapy with rituximab, cyclophosphamide, vincristine, and prednisolone reduced and eliminated multiple nodules. Pulmonary lymphoma should be considered as a differential diagnosis in the case of multiple nodules on a chest CT.<\/jats:p>","DOI":"10.1002\/rcr2.1111","type":"journal-article","created":{"date-parts":[[2023,2,22]],"date-time":"2023-02-22T09:02:02Z","timestamp":1677056522000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Primary pulmonary diffuse large B\u2010cell lymphoma presenting multiple nodules mimicking metastasis: A case report"],"prefix":"10.1002","volume":"11","author":[{"given":"Nobuhiro","family":"Fujioka","sequence":"first","affiliation":[{"name":"Department of Respiratory Medicine Nara Medical University  Nara Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6197-5176","authenticated-orcid":false,"given":"Yoshiro","family":"Kai","sequence":"additional","affiliation":[{"name":"Department of Respiratory Medicine Minami\u2010Nara General Medical 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