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Original Article
Hematology
Changes and correlations of T-cell coinhibitory molecule programmed death-1 and interferon-γ in pediatric immune thrombocytopenia
Fady Mohamed El-Gendy, Amira M.F. Shehata, Esam Awad Abd El-Kawy, Mahmoud Ahmed El-Hawy
Clin Exp Pediatr. 2023;66(3):127-133.   Published online February 24, 2023
Question: What are the PD-1+ CD4+ T cells percentages and serum interferon gamma (IFN-γ) levels of pediatric patients with immune thrombocytopenia (ITP)?
Finding: Compared with healthy controls, the PD-1+ CD4+ T cells percentages and IFN-γ levels were significantly higher in ITP patients before and 1 month after therapy.
Meaning: Our findings suggest that PD-1+ CD4+ T cells and IFN-γ are involved in the pathophysiological process of ITP.
Review Article
Neonatology (Perinatology)
Pathophysiology, classification, and complications of common asymptomatic thrombocytosis in newborn infants
Ga Won Jeon
Clin Exp Pediatr. 2022;65(4):182-187.   Published online October 18, 2021
· Thrombocytosis, common in newborns and infants (<2 years) (3%–13%), is caused by elevated thrombopoietin (TPO) concentrations.
· Serum TPO levels are significantly higher immediately to 1 month postnatal and decrease with age.
· Platelet counts are positively correlated with gestational age at birth and postnatal age.
· Thrombocytosis is more common in preterm than in term infants.
· Thrombocytosis in newborns is reactive and resolves spontaneously without complications.