{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,2]],"date-time":"2026-05-02T12:57:32Z","timestamp":1777726652915,"version":"3.51.4"},"reference-count":12,"publisher":"SAGE Publications","issue":"4","license":[{"start":{"date-parts":[[2025,4,1]],"date-time":"2025-04-01T00:00:00Z","timestamp":1743465600000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"},{"start":{"date-parts":[[2025,4,1]],"date-time":"2025-04-01T00:00:00Z","timestamp":1743465600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"name":"Research fund of Zhenjiang First People's Hospital","award":["YQ2023007"],"award-info":[{"award-number":["YQ2023007"]}]},{"name":"Jiangsu Province Social Development Program","award":["BE2023755"],"award-info":[{"award-number":["BE2023755"]}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["J Int Med Res"],"published-print":{"date-parts":[[2025,4]]},"abstract":"<jats:p>Kikuchi-Fujimoto disease, also known as histiocytic necrotizing lymphadenitis, is a rare self-limiting condition primarily characterized by cervical lymphadenopathy and fever. This report presents the case of a Han Chinese woman in her early 40s who had no significant medical history and presented with a painless mass behind her ear. She denied systemic symptoms such as fever, night sweats, or weight loss. Physical examination revealed a non-tender, mobile mass in the postauricular region. Initial ultrasound suggested a small cystic structure, and the mass was subsequently excised. Initial pathology reported reactive lymphoid hyperplasia; however, due to atypical presentation, immunohistochemical staining was performed, which was positive for multiple markers consistent with Kikuchi-Fujimoto disease. The patient did not receive specific treatment and remained asymptomatic with no recurrence at 1-month follow-up. The patient lacked typical lymph node pain and fever. The absence of typical lymph node pain and fever in the patient in this case highlights the importance of considering Kikuchi-Fujimoto disease in the differential diagnosis of painless lymphadenopathy and underscores the significance of histopathological examination and immunohistochemical analysis in reaching a definitive diagnosis.<\/jats:p>","DOI":"10.1177\/03000605251332902","type":"journal-article","created":{"date-parts":[[2025,4,29]],"date-time":"2025-04-29T18:04:52Z","timestamp":1745949892000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Painless postauricular mass: An atypical presentation of Kikuchi-Fujimoto disease"],"prefix":"10.1177","volume":"53","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6444-3324","authenticated-orcid":false,"given":"Ren-He","family":"Chen","sequence":"first","affiliation":[{"name":"Department of Dermatology, Affiliated People\u2019s Hospital of Jiangsu University, Zhenjiang, Jiangsu, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ke-Yun","family":"Ding","sequence":"additional","affiliation":[{"name":"Department of Dermatology, Affiliated People\u2019s Hospital of Jiangsu University, Zhenjiang, Jiangsu, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhi-Guo","family":"Zhao","sequence":"additional","affiliation":[{"name":"Department of Dermatology, Affiliated People\u2019s Hospital of Jiangsu University, Zhenjiang, Jiangsu, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fang-Zhou","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Pathology, Affiliated People\u2019s Hospital of Jiangsu University, Zhenjiang, Jiangsu, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guo-Rui","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Pathology, Affiliated People\u2019s Hospital of Jiangsu University, Zhenjiang, Jiangsu, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2025,4,29]]},"reference":[{"key":"e_1_3_7_2_2","first-page":"379","article-title":"Lymphadenitis showing focal reticulum cell hyperplasia with nuclear debris and phagocytosis: a clinicopathological study","volume":"35","author":"Kikuchi M","year":"1972","unstructured":"Kikuchi M, Fujimoto Y. Lymphadenitis showing focal reticulum cell hyperplasia with nuclear debris and phagocytosis: a clinicopathological study. Acta Haematol Jpn 1972; 35: 379\u2013380.","journal-title":"Acta Haematol Jpn"},{"key":"e_1_3_7_3_2","doi-asserted-by":"publisher","DOI":"10.12998\/wjcc.v11.i16.3664"},{"key":"e_1_3_7_4_2","doi-asserted-by":"publisher","DOI":"10.1007\/s12105-019-01026-0"},{"key":"e_1_3_7_5_2","first-page":"e21049","article-title":"Kikuchi-Fujimoto disease following COVID-19","volume":"14","author":"Al Ghadeer HA","year":"2022","unstructured":"Al Ghadeer HA, AlKadhem SM, AlMajed MS, et\u00a0al. Kikuchi-Fujimoto disease following COVID-19. 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