COVID-19 Pandemic Triggers New Challenges in Diagnosing and Managing Kawasaki Disease and MIS-C

Strategic Insights -

Research published in the Italian Journal of Pediatrics has highlighted the distinct clinical and laboratory profiles between Kawasaki disease (KD) and Multisystem Inflammatory Syndrome in Children (MIS-C) in pediatric patients during the COVID-19 pandemic. The study, conducted at a tertiary care center in Saudi Arabia, aimed to characterize and compare the clinical presentations, laboratory findings, cardiac manifestations, and treatment outcomes of KD and MIS-C.

Key Takeaways:

  • The study analyzed data from 41 pediatric patients (ages 0-14 years) diagnosed with either KD (n = 31) or MIS-C (n = 10) between January 2020 and December 2023.
  • The researchers found that KD patients demonstrated significantly higher rates of conjunctivitis (64.5% vs. 0%, p < 0.001) and coronary artery zone involvement (90.3% vs. 50%, p = 0.01) compared to MIS-C patients.
  • In the MIS-C group, one mortality occurred due to sepsis, while in the KD group, one patient developed a coronary aneurysm.
  • The study suggests that KD patients are at a higher risk of developing coronary artery complications, while MIS-C patients are at a higher risk of mortality.
  • The researchers propose that distinct pathophysiological mechanisms may be involved in the development of KD and MIS-C during the COVID-19 pandemic.
  • The study highlights the need for larger multicenter studies to validate these findings and inform diagnostic approaches and treatment strategies.

Statistics:

  • 41 pediatric patients participated in the study, with a median age of 5.6 years and a male-to-female ratio of 56.1%:43.9%.
  • 31 patients were diagnosed with Kawasaki disease (KD), while 10 were diagnosed with Multisystem Inflammatory Syndrome in Children (MIS-C).
  • 64.5% of KD patients exhibited conjunctivitis, compared to 0% of MIS-C patients (p < 0.001).
  • 90.3% of KD patients had coronary artery zone involvement, compared to 50% of MIS-C patients (p = 0.01).
  • One patient in the MIS-C group died due to sepsis.
  • One patient in the KD group developed a coronary aneurysm.

Sources:

  • Italian Journal of Pediatrics. 2025,51(1):1-7. (Italian Journal of Pediatrics - http://www.ijponline.net/)
  • "Clinical characteristics and outcomes of Kawasaki disease and multisystem inflammatory syndrome in Arab children during the COVID-19 pandemic: a single-center experience from the middle East." (Italian Journal of Pediatrics - https://doi-org.sdpl.idm.oclc.org/10.1186/s13052-025-02120-6)
  • NewsRx. New COVID-19 Research from Division of Pediatrics Discussed (Clinical characteristics and outcomes of Kawasaki disease and multisystem inflammatory syndrome in Arab children during the COVID-19 pandemic: a single-center experience from the ...). Cardiovascular Week. October 20, 2025; p 323.