Short-term and medium-term clinical outcomes of multisystem inflammatory syndrome in children: a prospective observational cohort study

Anastasia Glazyrina, Elena Zholobova, Ekaterina Iakovleva, Polina Bobkova, Ekaterina Krasnaya, Karina Kovygina, Olga Romanova, Oleg Blyuss, Konstantin Tutelman, Polina Petrova, Anastasiia Bairashevskaia, Mikhail Rumyantsev, Anatoliy A Korsunskiy, Elena Kondrikova, Anzhelika Nargizyan, Valeriya Yusupova, Evgeniya Korobyants, Anna Sologub, Seda Kurbanova, Aleksandr SuvorovLouise Sigfrid, Danilo Buonsenso, Diego G Peroni, Andrew James McArdle, Pasquale Comberiati, Daniel Munblit

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BACKGROUND: Even though the incidence of Multisystem Inflammatory Syndrome in children (MIS-C) is decreasing cases are still reported across the world. Studying the consequences of MIS-C enhances our understanding of the disease's prognosis. The objective of this study was to assess short- and medium-term clinical outcomes of MIS-C.

METHODS: Prospective observational cohort study at Municipal Children's Hospital Morozovskaya, Moscow, Russia. All children meeting the Royal College of Paediatrics and Child Health (RCPCH), Centers for Disease Control and Prevention (CDC), or the World Health Organization (WHO) MIS-C case definition admitted to the hospital between 17 May and 26 October 2020 were included in the study. All survivors were invited to attend a clinic at 2 and 6 weeks after hospital discharge.

RESULTS: 37 children median age 6 years (interquartile range [IQR] 3.3-9.4), 59.5% (22/37) boys were included in the study. 48.6% (18/37) of patients required ICU care. One child died. All children had increased levels of systemic inflammatory markers during the acute event. Echocardiographic investigations identified abnormal findings in 35.1% (13/37) of children. 5.6% (2/36) of children were presenting with any symptoms six weeks after discharge. By six weeks the inflammatory markers were within the reference norms in all children. The echocardiographic evaluation showed persistent coronary dilatation in one child.

CONCLUSIONS: Despite the severity of their acute MIS-C, the majority of children in our cohort fully recovered with none having elevated laboratory markers of inflammation at 6 weeks, few (< 10%) reporting persistent symptoms at 6 weeks, and only one with persistent echocardiographic abnormalities.

Original languageEnglish
Article number1
Pages (from-to)1
JournalItalian Journal Of Pediatrics
Issue number1
Publication statusPublished - 4 Jan 2024


  • Male
  • Humans
  • Child
  • Prospective Studies
  • Systemic Inflammatory Response Syndrome/diagnosis
  • Connective Tissue Diseases
  • COVID-19


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