Background: Post coronavirus disease 2019 (COVID-19) infections, children presented with varying clinical manifestations of a Multisystem Inflammatory Syndrome in Children (MIS-C). The aim of our study is to identify the clinical manifestations upon admission to paediatric intensive care unit (PICU) and to identify how different treatments affected post-treatment outcomes. 

Methods: A retrospective cross-sectional study included 11 patients diagnosed with multisystem inflammatory syndrome based on the World Health Organization (WHO) classification and treated by intravenous immunoglobulin (IVIG) with/without corticosteroids. 

Results: There were six female and five male patients with an average age of 5.08±4.7 years. Ten had a confirmed positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) serological antibody test or polymerase chain reaction (PCR) test, with one having only contact history. The most common systems affected by MIS-C were gastrointestinal and ophthalmological presentations. All presented with fever and raised inflammatory markers (erythrocyte sedimentation rate, C-reactive protein, procalcitonin, ferritin, d-dimer, and lactate dehydrogenase). There was no statistical difference between both treatment groups. Clinical and inflammatory markers significantly improved in both groups.

Conclusions: This study highlights an improved outcome associated with combination therapy, although there is no statistical significance between both groups.