Background: In multisystem inflammatory syndrome in children (MIS-C) temporarily associated with coronavirus disease-19 (COVID-19), myocardial damage has been reported. Materials and Methods: A retrospective observational cohort study included children under 18 who had a myocardial injury related to COVID-19 treated in mother and child health institute from April 2020 to August 2020. Myocardial injury related to COVID-19 was manifested by elevated serum cardiac troponin and NT-proBNP with LV dysfunction, arrhythmias, and coronary arteries (CAs) dilatation or aneurysms. During the short-term follow-up, cardiac testing (electrocardiography, laboratory analysis, echocardiography, 24-h Holter monitoring, exercise stress test, and cardiac magnetic resonance) was performed. Results: Six male adolescents (14.7 ± 2.4 years) were included in the analysis (2/6 had MIS-C shock syndrome). All patients had elevated acute-phase reactants and NT-proBNP, whereas troponins were elevated in 5/6 patients. Echocardiography revealed left ventricular (LV) systolic dysfunction (EF 45.2 ± 6.9%); 2/6 had dilated CAs. IVIG was prescribed to all patients with MIS-C. Four patients required inotropic drug support. During hospitalization, a significant reduction of CRP, LDH, NT-proBNP, and D-dimer (P < 0.05) was registered. LV systolic function recovery was registered 3 days after applied therapy (P < 0.001). None of the patients developed dilated cardiomyopathy or CA aneurysms. Conclusions: With early recognition and adequate MIS-C therapy, children recovered entirely, maintained in the short-term follow-up period.

Background: Evaluation of insulin-like growth factor-1 (IGF-1) association with retinopathy of prematurity (ROP) is our object. Materials and Methods: This study was conducted on IGF-1 levels of 40 neonates <34 weeks gestational age and 2000 g at 1^st week and 4–6 weeks after birth. All participants were evaluated for ROP after 31 weeks of gestation. Results: IGF-1 levels showed a significant difference between neonates ≤1500 and 1500–2000 g (1 and 4–6 weeks, P = 0.008, P = 0.039, respectively). No significant association was found between IGF-1 and ROP. Conclusion: Finding a meaningful association between IGF-1 and ROP requires consideration of factors affecting the IGF-1.