ABSTRACT
OBJECTIVE: To report and describe cases of children presenting with coronavirus disease 2019 (COVID-19)-related multisystem inflammatory syndrome in children (MIS-C) with new-onset type 1 diabetes mellitus (T1DM) in severe diabetic ketoacidosis (DKA). RESEARCH DESIGN AND METHODS: This prospective observational study was conducted to characterize children with COVID-19-related MIS-C and new-onset T1DM who were in DKA. MIS-C was diagnosed if Centers for Disease Control and Prevention and World Health Organization criteria were fulfilled. RESULTS: Six cases were identified. The patients were critically ill and in nonfluid responsive shock (combined hypovolemic and cardiogenic or distributive shock). All had cardiac involvement. One patient had a Kawasaki shock-like presentation. All needed aggressive treatment with careful monitoring of fluid balance (because of associated cardiac dysfunction), early institution of vasoactive/inotropic supports, and use of methylprednisolone and intravenous immunoglobulins. The latter are better administered after DKA resolution to avoid undue volume overload and fluid shifts while the patients are in DKA. CONCLUSIONS: Awareness of MIS-C coexistence with DKA at T1DM onset is crucial for rapid proper management.