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International Journal of Rheumatic Diseases ; 26(Supplement 1):153.0, 2023.
Article in English | EMBASE | ID: covidwho-2230291


Background/Purpose: The coronavirus disease 2019 (COVID-19) pandemic has led to the emergence of a severe associated condition, multisystem inflammatory syndrome in adults (MIS-A). Initially identified in children as MIS-C, literature regarding the clinical manifestations, illness progression, and treatment of MIS-A are limited. Method(s): This study describes a case of MIS-A presenting as fever and seizures. She was initially given steroids and IVIG, and due to recurrence of fever, she was later treated with tocilizumab. Result(s): The patient was a 55-year- old Filipino female presenting to the emergency department with five days of fever, headache, and disorientation. Lumbar tap was done, which showed elevated opening pressure, normal leukocyte count, normal glucose, slightly elevated protein, and no microorganisms. She was admitted and managed as a case of viral encephalitis. On hospital day 6, she had sudden onset of head-jerking and further decrease in sensorium, hence she was transferred to the intensive care unit. Brain MRI was unremarkable, and subsequent immune-mediated encephalitis was considered. The patient underwent methylprednisolone pulse therapy and IVIG infusion, which provided immediate improvement of sensorium and resolution of fever episodes. Her condition stabilized, and she was transferred out of intensive care. She underwent physical and occupational rehabilitation as preparation for discharge. Two weeks after infusion therapy, on hospital day 26, patient had recurrence of fever episodes and persistence of elevated inflammatory markers. The patient had reported a previous COVID-19 infection 10 weeks prior to admission and received a booster dose of Moderna (Spikevax) COVID-19 vaccine three weeks prior. She tested positive for ANA (1:640, nuclear speckled), while the rest of the autoimmune antibody tests were negative. She was diagnosed as MIS-A based on the following: documented fever (>=38 degrees centigrade) for >=24 hours prior to hospitalization;new-onset neurologic signs and symptoms including seizures and encephalopathy in a patient without prior cognitive impairment;elevated CRP, ferritin, IL-6, and ESR;and a positive SARS-CoV- 2 test for recent infection by RT-PCR. Patient was treated with a locally available monoclonal antibody, tocilizumab, which was given on hospital day 43. Following infusion, she had lysis of fever and marked decrease in CRP, ferritin, IL-6, and ESR. Patient was discharged improved and without end-stage organ damage. Conclusion(s): Immunomodulators target hyperinflammation seen in MIS-A. There may be a role for the use of tocilizumab via blockage of IL-6. MIS-A remains a topic for research, particularly its disease characteristics, management, and relation to a dysregulated immune system.