• Elie Cogan, Pierre Foulon, Olivier Cappeliez, Nicole Dolle, Gaëlle Vanfraechem, and Daniel De Backer.
• Department of Internal Medicine, CHIREC Hospital, Brussels, Belgium.
• Front Med (Lausanne). 2020 Jan 1; 7: 428.

AbstractA severe multisystem inflammatory syndrome associated with Kawasaki disease manifestations (MIS-C) has been recently reported in children with signs of recent infection with SARS-CoV-2. We here reported the case of a young adult woman who presented the complete manifestations of Kawasaki disease associated with a severe myocarditis, acute respiratory distress syndrome and hemodynamic instability a few weeks after a transient anosmia. The detection of specific antibodies to SARS-CoV-2 in the absence of detection of the virus suggested that the syndrome was the result of a delayed immune response to a recent COVID-19 infection. A combined treatment with colchicine, tocilizumab, high dose immunoglobulins, and methylprednisolone allowed to control the inflammatory process and to limit the development of coronary aneurysm. The patient recovered without sequelae. This case emphasized the importance of SARS-CoV-2 serology for the diagnosis of delayed immune complications of COVID-19. Clinicians caring for adult patients must be aware that not only children but also young adults can be affected by a multisystem inflammatory syndrome with KD features associated with COVID-19.Copyright © 2020 Cogan, Foulon, Cappeliez, Dolle, Vanfraechem and De Backer.

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