الفهرس 
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Abstract
Background: All pediatric health organizations are concerned about the impact of corona virus disease on children especially on those with other comorbidities; fortunately pediatric cases appear to be less severe than adults [1]. The purpose of this study is to characterize chest CT findings of children with and without comorbidities who had confirmed coronavirus disease (COVID-19) and to investigate the relation between chest CT findings and the clinical severity of COVID-19 pneumonia and their laboratory findings.
Results: The study was conducted on 36 patients, 72.2% of them had associated comorbidities .Twenty three patients (63.88%) had abnormal CT findings. Consolidative patches were the most common radiological sign (55.6%) followed by ground glass opacities (50%). The lesions were bilateral in (58.3%), having predominantly peripheral distribution (38.9%) with predominant left lower lobe affection (25%).Cases with clinically severe chest condition had a significantly more prevalent consolidative patches (p=0.026) which show a higher CT density (p=0.01) and a significantly higher CT severity score (SS) compared to other groups (p= 0.029).The cut-off of severity score 4 /20 had 100% sensitivity and 78.12% specificity in diagnosis of severe cases and there were no statistically significant difference between patients with or without comorbidities as regards CT-SS nor any of radiological signs .
Conclusions: Consolidation was the most common radiological finding in children with COVID-19 and being more prevalent and denser in severe cases. The CT-SS may be used as a complementary tool for evaluation of the severity of chest condition. Chest CT-SS more than 4 can be used as an indicator of severe cases, yet no significant difference regarding CT-SS between patients with associated comorbidities or not.