IntroductionWe aimed to characterize biochemical and cardiovascular predictors of paediatric inflammatory multisystem syndrome temporally associated with SARS-CoV-2 (PIMS-TS) risk based on the data from the LATE-COVID-Kids study.Material and methods148 consecutive COVID-19 convalescents hospitalized for the clinical evaluation after the acute phase of COVID-19 were classified into two groups related to symptoms: 33 children finally diagnosed with PIMS-TS and 115 children without PIMS-TS (control group).ResultsPIMS-TS children were significantly younger (6.79 ±4.57 vs. 9.10 ±4.94 years). After adjustment, in comparison to those without, PIMS-TS children had a higher level of antithrombin III (111 ±9.30 vs. 105 ±11.4), higher heart rate (HR)/min (100 (89.0–111) vs. 90 (79.7–100)) and sinus rhythm (p = 0.03) but lower PQ interval (p = 0.02) on admission to hospital. The lymphocytes (absolute count and percentage) were significantly higher in children with PIMS-TS, and the opposite results were obtained for IgA and neutrophils. Furthermore, children with PIMS-TS had a higher level of thyroid stimulating hormone (2.76 (2.16–4.18) vs. 2.36 (1.73–2.83)) and red cell distribution width (p < 0.005) compared to those without.ConclusionsIt is the first data on the possible predictors of PIMS-TS risk in the Long-COVID period. These results need to be further validated to next create the PIMS SCORE algorithm, which might enable the effective prediction of children with the risk of PIMS-TS occurrence after COVID-19 recovery.
Background: Pediatric inflammatory multisystem syndrome temporally associated with SARS-CoV-2 (PIMS-TS) is a novel entity. The inflammatory process involves the circulatory, digestive, respiratory, and central nervous systems, as well as the skin. Making a diagnosis requires extensive differential diagnoses, including lung imaging. The aim of our study was to retrospectively assess the pathologies found in lung ultrasound (LUS) in children diagnosed with PIMS-TS and to evaluate the usefulness of the examination in diagnostics and monitoring. Methods: The study group consisted of 43 children diagnosed with PIMS-TS, in whom LUS was performed at least three times, including on admission to hospital, on discharge, and 3 months after disease onset. Results: Pneumonia (mild to severe) was diagnosed in 91% of the patients based on the ultrasound image; the same number had at least one pathology, including consolidations, atelectasis, pleural effusion, and interstitial or interstitial-alveolar syndrome. By the time of discharge, the inflammatory changes had completely regressed in 19% of the children and partially in 81%. After 3 months, no pathologies were detected in the entire study group. Conclusion: LUS is a useful tool for diagnosing and monitoring children with PIMS-TS. Inflammatory lesions of the lungs resolve completely when the generalized inflammatory process subsides.
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