{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,9]],"date-time":"2026-05-09T05:13:06Z","timestamp":1778303586941,"version":"3.51.4"},"reference-count":10,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2026,5,8]],"date-time":"2026-05-08T00:00:00Z","timestamp":1778198400000},"content-version":"vor","delay-in-days":127,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Case Reports in Medicine"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:p>Fever of unknown origin (FUO) is a common diagnostic dilemma faced by internists on a fairly regular basis. A wide variety of infectious, autoimmune, and neoplastic conditions can present with FUO. Splenic B\u2010cell lymphoma\/leukemia with prominent nucleolus (SBLPN), formerly known as hairy cell leukemia\u2010variant, is a hematologic malignancy that often presents with massive splenomegaly and pancytopenia. Initial presentation of SBLPN as FUO is exceedingly rare. Here, we present the case of an elderly gentleman in his 80s who presented with fever, night sweats, weight loss, and recurrent falls. He was subsequently diagnosed with SBLPN after 6\u2009weeks of extensive diagnostic evaluation. The practicing internist needs to be aware of this initial presentation of SBLPN as FUO and have a low suspicion to proceed with a bone marrow aspiration and biopsy to clench the diagnosis in the right clinical context.<\/jats:p>","DOI":"10.1155\/carm\/4919763","type":"journal-article","created":{"date-parts":[[2026,5,9]],"date-time":"2026-05-09T04:51:41Z","timestamp":1778302301000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Splenic, Nonhairy, B\u2010Cell Lymphoma Presenting as Fever of Unknown Origin"],"prefix":"10.1155","volume":"2026","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8398-7810","authenticated-orcid":false,"given":"Abdul","family":"Rehman","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"John E.","family":"McKnight","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hafiz","family":"Javed","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Arfa","family":"Ahmad","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Patrick","family":"O\u2019Reilly","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2026,5,8]]},"reference":[{"key":"e_1_2_10_1_2","doi-asserted-by":"publisher","DOI":"10.3855\/jidc.18192"},{"key":"e_1_2_10_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.cmi.2023.08.010"},{"key":"e_1_2_10_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.amjmed.2024.07.015"},{"key":"e_1_2_10_4_2","doi-asserted-by":"publisher","DOI":"10.1111\/bjh.19754"},{"key":"e_1_2_10_5_2","doi-asserted-by":"publisher","DOI":"10.1111\/jcmm.18060"},{"key":"e_1_2_10_6_2","doi-asserted-by":"publisher","DOI":"10.1093\/ofid\/ofae298"},{"key":"e_1_2_10_7_2","doi-asserted-by":"publisher","DOI":"10.2169\/internalmedicine.2021-23"},{"key":"e_1_2_10_8_2","doi-asserted-by":"publisher","DOI":"10.3904\/kjm.2021.96.2.101"},{"key":"e_1_2_10_9_2","doi-asserted-by":"publisher","DOI":"10.1097\/md.0000000000034951"},{"key":"e_1_2_10_10_2","doi-asserted-by":"publisher","DOI":"10.4103\/jcrt.jcrt_1931_22"}],"container-title":["Case Reports in Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1155\/carm\/4919763","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1155\/carm\/4919763","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1155\/carm\/4919763","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,5,9]],"date-time":"2026-05-09T04:51:43Z","timestamp":1778302303000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1155\/carm\/4919763"}},"subtitle":[],"editor":[{"given":"Semonti","family":"Nandi","sequence":"additional","affiliation":[],"role":[{"role":"editor","vocabulary":"crossref"}]}],"short-title":[],"issued":{"date-parts":[[2026,1]]},"references-count":10,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2026,1]]}},"alternative-id":["10.1155\/carm\/4919763"],"URL":"https:\/\/doi.org\/10.1155\/carm\/4919763","archive":["Portico"],"relation":{},"ISSN":["1687-9627","1687-9635"],"issn-type":[{"value":"1687-9627","type":"print"},{"value":"1687-9635","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,1]]},"assertion":[{"value":"2025-02-10","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-04-16","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-05-08","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"4919763"}}