{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T09:02:56Z","timestamp":1773392576081,"version":"3.50.1"},"reference-count":5,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2026,2,24]],"date-time":"2026-02-24T00:00:00Z","timestamp":1771891200000},"content-version":"vor","delay-in-days":23,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,2,1]],"date-time":"2026-02-01T00:00:00Z","timestamp":1769904000000},"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":["Respirology Case Reports"],"published-print":{"date-parts":[[2026,2]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>Kikuchi\u2013Fujimoto disease (KFD), also known as histiocytic necrotising lymphadenitis, is a benign, self\u2010limiting disorder that primarily affects young women and is typically characterised by fever and cervical lymphadenopathy. However, isolated mediastinal lymphadenopathy without cervical involvement is rare. We report the case of a 37\u2010year\u2010old woman who presented with persistent fever and mediastinal lymphadenopathy. Endobronchial ultrasound\u2010guided transbronchial needle aspiration (EBUS\u2010TBNA) cytology of the lymph nodes revealed necrosis and atypical lymphoid cells, highly suggestive of malignant lymphoma. Owing to diagnostic difficulties, video\u2010assisted thoracoscopic excision was performed to obtain a definitive diagnosis. Histopathological examination confirmed KFD with massive necrosis and histiocytic infiltration. The patient underwent symptomatic treatment and remained under long\u2010term follow\u2010up. This case highlights the rarity of mediastinal\u2010limited KFD and the diagnostic pitfall of EBUS\u2010TBNA cytology, emphasising that surgical biopsy is critical for an accurate diagnosis when malignancy is suspected in this atypical presentation.<\/jats:p>","DOI":"10.1002\/rcr2.70521","type":"journal-article","created":{"date-parts":[[2026,3,8]],"date-time":"2026-03-08T08:49:11Z","timestamp":1772959751000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Localised Kikuchi\u2013Fujimoto Disease With Mediastinal Lymphadenopathy: A Case Initially Mimicking Malignant Lymphoma on Endobronchial Ultrasound\u2010Guided Transbronchial Needle Aspiration Cytology"],"prefix":"10.1002","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4987-9952","authenticated-orcid":false,"given":"Kenta","family":"Nishiyama","sequence":"first","affiliation":[{"name":"Department of Respiratory Medicine Nakagami Hospital  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