Background: Characteristics of dermatological manifestations are frequently encountered in pediatric COVID-19, similar to the presentation in multisystem inflammatory syndrome in children (MIS-C), which typically emerges following COVID-19 infection. The rash exhibits considerable diversity and lacks specificity. However, investigations into the dermatological features of COVID-19 in children and MIS-C remain limited.

Objective: To investigate cutaneous manifestations in both COVID-19 and MIS-C in children.

Materials and Methods: Cross-sectional study between February and August 2022 in hospitalized children with COVID-19 who had cutaneous lesions and all hospitalized children with MIS-C.

Results: Forty-six cases of COVID-19 patients with dermatological manifestations were identified among 1,602 COVID-19 patients, constituting 2.9%. Additionally, 35 cases of MIS-C were diagnosed. The majority of COVID-19 patients in the present study exhibited mild symptoms, accounting for 42 cases (91.3%). The median age of COVID-19 patients was 1.8 years, which was significantly lower than that of the MIS-C group, which was 4.3 years, with a statistically significant difference (p=0.024). The most common rash types observed in both groups were urticaria, maculopapular rash, and macular erythema. Other rash types noted in COVID-19 included erythema nodosum, Stevens-Johnson syndrome, erythema multiformelike, vesicles, and livedo reticularis. Among MIS-C patients, 31 cases (88.6%) presented with mucocutaneous manifestations, with 26 cases (74.3%) exhibiting concurrent mucocutaneous involvement. There was no significant difference in the occurrence of cardiac symptoms between the group with mucocutaneous manifestations and/or dermatological symptoms, which was 81.8%, compared to the group without mucocutaneous or dermatological symptoms, which was 100% (p=0.102).

Conclusion: The cutaneous manifestations in pediatric COVID-19 and those with MIS-C vary widely and are non-specific. In patients presenting with fever and rash during a COVID-19 outbreak, recognizing these cutaneous symptoms is crucial for prompt diagnosis and treatment especially those who are asymptomatic. Further studies involving COVID-19 patients, both with and without rash, may provide correlation between disease progression and skin manifestation.

Received 21 June 2024 | Revised 13 August 2024 | Accepted 20 August 2024

DOI: 10.35755/jmedassocthai.2024.10.756-763-1282