{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,6]],"date-time":"2026-07-06T16:21:16Z","timestamp":1783354876430,"version":"3.54.6"},"reference-count":24,"publisher":"Springer Science and Business Media LLC","issue":"7","license":[{"start":{"date-parts":[[2026,5,11]],"date-time":"2026-05-11T00:00:00Z","timestamp":1778457600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2026,7,6]],"date-time":"2026-07-06T00:00:00Z","timestamp":1783296000000},"content-version":"vor","delay-in-days":56,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["J Cancer Res Clin Oncol"],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Rosai\u2013Dorfman disease (RDD) is a rare type of histiocytosis usually presenting with painless bilateral cervical lymphadenopathy and leukocytosis. Cytopenias, particularly isolated lymphopenia, are particularly uncommon and poorly characterized. Hereby, we report a case of a 3-year-old boy presenting with progressive bilateral cervical lymphadenopathy and profound T- and B-cell lymphopenia. Immunophenotyping demonstrated markedly reduced CD3\n                    <jats:sup>+<\/jats:sup>\n                    , CD4\n                    <jats:sup>+<\/jats:sup>\n                    , CD8\n                    <jats:sup>+<\/jats:sup>\n                    , and CD19\n                    <jats:sup>+<\/jats:sup>\n                    cells, low borderline level of NK-cells, and expansion of TCR\u03b3\u03b4\n                    <jats:sup>+<\/jats:sup>\n                    double-negative (CD3\n                    <jats:sup>+<\/jats:sup>\n                    \/CD4\n                    <jats:sup>\u2212<\/jats:sup>\n                    \/CD8\n                    <jats:sup>\u2212<\/jats:sup>\n                    ) T cells. B-cell subset analysis revealed reduced switched memory and marginal zone compartments with increased transitional B cells, suggesting immune dysregulation. Imaging confirmed extensive cervical and mediastinal lymphadenopathy. Lymph node excision biopsy showed characteristic sinus histiocytosis with emperipolesis, confirming the diagnosis of nodal RDD. No autoantibodies were detected, and bone marrow examination and genetic testing were unremarkable. Given the clinical stability and absence of organ dysfunction, the patient was conservatively managed with prophylactic antimicrobials and close surveillance, remaining stable at follow-up. A review of the literature was also conducted, identifying eight well-characterized RDD cases associated with cytopenia, involving only two cases reporting isolated lymphopenia, emphasizing the rarity of this presentation. Most cases required systemic immunosuppression due to autoimmune features or progressive disease. Detailed lymphocyte subset characterization was rarely reported. In conclusion, this case expands the immunologic spectrum of RDD and highlights isolated severe lymphopenia as a uniquely rare presentation. Comprehensive immunophenotyping is essential to distinguish RDD from primary immunodeficiency and lymphoproliferative disorders, as immune-dysregulated RDD may represent a biologically distinct subgroup with implications for precision management.\n                  <\/jats:p>","DOI":"10.1007\/s00432-026-06496-8","type":"journal-article","created":{"date-parts":[[2026,5,11]],"date-time":"2026-05-11T05:23:21Z","timestamp":1778477001000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Rare presentation of Rosai\u2013Dorfman disease with severe lymphopenia: a pediatric case report and review of the literature"],"prefix":"10.1007","volume":"152","author":[{"given":"Doa\u2019a","family":"Abdalla","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ruth","family":"Radcliffe","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hasan","family":"Asfour","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,5,11]]},"reference":[{"key":"6496_CR1","doi-asserted-by":"crossref","unstructured":"Abla O, Jacobsen E, Picarsic J, Krenova Z, Jaffe R, Emile J-F et al Consensus recommendations for the diagnosis and clinical management of Rosai-Dorfman-Destombes disease. 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Ethical approval was not required for this single case report in accordance with the institutional policies of the University Hospitals of Leicester NHS Trust. Written informed consent for publication of this case report and any accompanying images was obtained from the patient\u2019s legal guardians. A copy of the consent is available for review upon request.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval"}}],"article-number":"129"}}