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      Kikuchi-Fujimoto Disease Following COVID-19 Infection in a 7-Year-Old Girl: A Case Report and Literature Review

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          Abstract

          The coronavirus disease 2019 (COVID-19) symptoms in children are relatively mild and often do not require treatment. Nonetheless, complications caused by the immune response to COVID-19 in children are possible and diverse. We present the case of a 7-year-old girl with persistent fever and lymphadenopathy arising from SARS-CoV-2 infection, diagnosed with Kikuchi-Fujimoto Disease (KFD) on lymph node biopsy. KFD is a rare benign disease, clinically characterized by fever and tender cervical lymphadenopathy affecting posterior cervical lymph nodes. We also reviewed six previously reported cases of COVID-19-associated KFD that occurred in school-aged children and compared them with the present case. The clinical course of COVID-19-associated KFD was similar to that of previous reports of KFD with a favorable prognosis. This is the first report of a school-aged child developing KFD following SARS-CoV-2 infection. KFD should be considered when approaching patients with hyperinflammatory states who present with prolonged fever and cervical lymphadenopathy after COVID-19.

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          Characteristics and Outcomes of Children With Coronavirus Disease 2019 (COVID-19) Infection Admitted to US and Canadian Pediatric Intensive Care Units

          The recent and ongoing coronavirus disease 2019 (COVID-19) pandemic has taken an unprecedented toll on adults critically ill with COVID-19 infection. While there is evidence that the burden of COVID-19 infection in hospitalized children is lesser than in their adult counterparts, to date, there are only limited reports describing COVID-19 in pediatric intensive care units (PICUs).
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            Enigmatic Kikuchi-Fujimoto disease: a comprehensive review.

            To determine the clinicopathologic significance of Kikuchi-Fujimoto disease (KFD) and review the literature on this condition, we conducted a MEDLINE search of English-language articles published between 1972 and December 2003. KFD has a worldwide distribution, and Asiatic people have a higher prevalence. Its pathogenesis remains controversial. Patients are young and seek care because of acute tender, cervical lymphadenopathy and low-grade fever. Histologic findings include paracortical areas of coagulative necrosis with abundant karyorrhectic debris. Karyorrhectic foci consist of various types of histiocytes, plasmacytoid monocytes, immunoblasts, and small and large lymphocytes. There is an abundance of T cells with predominance of CD8+ over CD4+ T cells. Differential diagnosis includes lymphoma, lymphadenitis associated with systemic lupus erythematosus, and even adenocarcinoma. KFD is an uncommon, self-limited, and perhaps underdiagnosed process with an excellent prognosis. Accurate clinicopathologic recognition is crucial, particularly because KFD can be mistaken for malignant lymphoma.
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              SARS-CoV-2 Clinical Syndromes and Predictors of Disease Severity in Hospitalized Children and Youth

              Objective To characterize the demographic and clinical features of pediatric SARS-CoV-2 syndromes and identify admission variables predictive of disease severity. Study design We conducted a multicenter, retrospective and prospective study of pediatric patients hospitalized with acute SARS-CoV-2 infections and multisystem inflammatory syndrome in children (MIS-C) at eight sites in New York, New Jersey, and Connecticut. Results We identified 281 hospitalized patients with SARS-CoV-2 infections and divided them into three groups based on clinical features. Overall, 143 (51%) had respiratory disease, 69 (25%) had MIS-C, and 69 (25%) had other manifestations including gastrointestinal illness or fever. Patients with MIS-C were more likely to identify as non-Hispanic black compared with patients with respiratory disease (35% versus 18%, P=.02). Seven patients (2%) died and 114 (41%) were admitted to the ICU. In multivariable analyses, obesity (OR=3.39, 95% CI:1.26-9.10, P=.02) and hypoxia on admission (OR=4.01; 95% CI:1.14-14.15; P=.03) were predictive of severe respiratory disease. Lower absolute lymphocyte count (OR=8.33 per unit decrease in 109 cells/L, 95% CI:2.32-33.33, P=.001) and higher C-reactive protein (OR=1.06 per unit increase in mg/dL, 95% CI:1.01-1.12, P=.017) were predictive of severe MIS-C. Race/ethnicity or socioeconomic status were not predictive of disease severity. Conclusions We identified variables at the time of hospitalization that may help predict the development of severe SARS-CoV-2 disease manifestations in children and youth. These variables may have implications for future prognostic tools that inform hospital admission and clinical management.
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                Author and article information

                Journal
                Cureus
                Cureus
                2168-8184
                Cureus
                Cureus (Palo Alto (CA) )
                2168-8184
                3 July 2022
                July 2022
                : 14
                : 7
                : e26540
                Affiliations
                [1 ] Pediatrics, Otaru General Hospital, Otaru, JPN
                [2 ] Otolaryngology, Otaru General Hospital, Otaru, JPN
                [3 ] Clinical Pathology, Otaru General Hospital, Otaru, JPN
                Author notes
                Article
                10.7759/cureus.26540
                9351715
                35936128
                e1f6eb1a-92b0-4158-a3cc-0ebade975848
                Copyright © 2022, Saito et al.

                This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                History
                : 3 July 2022
                Categories
                Pediatrics
                Infectious Disease
                Hematology

                kikuchi-fujimoto disease,histiocytic necrotizing lymphadenitis,cervical lymphadenopathy,sars-cov-2,covid-19

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