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We present a 65-year-old man who presented with a concurrent intravascular large B-cell lymphoma and Waldenstr\u00f6m macroglobulinemia with prominent pulmonary symptoms masquerading as a hypersensitivity pneumonitis. A subsequent surgical lung biopsy illustrated peribronchial and interstitial nodular aggregates which consisted of numerous capillary structures filled with neoplastic B lymphocytes. This report hints toward potential induction of prominent neo-angiogenesis by intravascular large B-cell lymphoma, with development of intrapulmonary nodular aggregates mimicking interstitial lung disease.<\/jats:p>","DOI":"10.1177\/10668969261422270","type":"journal-article","created":{"date-parts":[[2026,3,23]],"date-time":"2026-03-23T09:43:41Z","timestamp":1774259021000},"page":"1347-1350","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Masquerading as an Interstitial Lung Disease: Intravascular Large B-Cell Lymphoma With Prominent Neo-Angiogenesis"],"prefix":"10.1177","volume":"34","author":[{"given":"Andreas","family":"Lancelot","sequence":"first","affiliation":[{"name":"University Hospitals Leuven"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anne-Marie","family":"Delsupehe","sequence":"additional","affiliation":[{"name":"Imelda Hospital"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1100-5600","authenticated-orcid":false,"given":"Vibeke K.J.","family":"Vergote","sequence":"additional","affiliation":[{"name":"University Hospitals Leuven"},{"name":"Laboratory of Experimental Hematology, KU Leuven, Leuven, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jolien","family":"De Bie","sequence":"additional","affiliation":[{"name":"University Hospitals Leuven"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lucienne","family":"Michaux","sequence":"additional","affiliation":[{"name":"University Hospitals Leuven"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas","family":"Tousseyn","sequence":"additional","affiliation":[{"name":"University Hospitals Leuven"},{"name":"Translational Cell &amp; Tissue Research Laboratory, KU Leuven, Leuven, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Birgit","family":"Weynand","sequence":"additional","affiliation":[{"name":"University Hospitals Leuven"},{"name":"Translational Cell &amp; Tissue Research Laboratory, KU Leuven, Leuven, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2412-8001","authenticated-orcid":false,"given":"Arno","family":"Vanstapel","sequence":"additional","affiliation":[{"name":"University Hospitals Leuven"},{"name":"Translational Cell &amp; Tissue Research Laboratory, KU Leuven, Leuven, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,3,23]]},"reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1182\/blood-2017-04-737445"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2141.2010.08354.x"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajhg.2020.10.015"},{"key":"e_1_3_2_5_2","doi-asserted-by":"publisher","DOI":"10.1038\/modpathol.3880450"},{"key":"e_1_3_2_6_2","doi-asserted-by":"publisher","DOI":"10.1182\/blood-2006-01-021253"}],"container-title":["International Journal of Surgical Pathology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/10668969261422270","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.1177\/10668969261422270","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/10668969261422270","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T10:14:15Z","timestamp":1787739255000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/10668969261422270"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,3,23]]},"references-count":5,"journal-issue":{"issue":"5","published-print":{"date-parts":[[2026,8]]}},"alternative-id":["10.1177\/10668969261422270"],"URL":"https:\/\/doi.org\/10.1177\/10668969261422270","relation":{"has-review":[{"id-type":"doi","id":"10.1177\/10668969261422270\/v2\/decision1","asserted-by":"object"},{"id-type":"doi","id":"10.1177\/10668969261422270\/v1\/review1","asserted-by":"object"},{"id-type":"doi","id":"10.1177\/10668969261422270\/v2\/response1","asserted-by":"object"},{"id-type":"doi","id":"10.1177\/10668969261422270\/v1\/decision1","asserted-by":"object"}]},"ISSN":["1066-8969","1940-2465"],"issn-type":[{"value":"1066-8969","type":"print"},{"value":"1940-2465","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,3,23]]}}}