Background: The coronavirus disease 2019 (COVID-19) pandemic has affected millions of people worldwide. A clinical series of Kawasaki-like multisystem inflammatory syndrome (MIS), occurring after SARS-CoV-2 infection, have been described in children (MIS-C) and adults (MIS-A), but the pathophysiology remains unknown.
Case presentation: We describe a case of post-COVID-19 MIS-A in a 46-year-old man with biopsy-proven renal thrombotic microangiopathy (TMA). Specific complement inhibition with eculizumab was initiated promptly and led to a dramatic improvement of renal function.
Conclusion: Our case suggests that that TMA could play a central role in the pathophysiology of post-COVID-19 MIS-A, making complement blockers an interesting therapeutic option.
Keywords: COVID-19; case report; complement system; eculizumab; multisystem inflammatory syndrome; thrombotic microangiopathy.
Copyright © 2021 Boudhabhay, Rabant, Roumenina, Coupry, Poillerat, Marchal, Frémeaux-Bacchi, El Karoui, Monchi and Pourcine.