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Editorial
Gastroenterology
Recent advances in epigenetic mechanisms, diagnosis, and treatment of pediatric gastrointestinal allergic disorders
Eell Ryoo
Clin Exp Pediatr. 2023;66(6):250-251.   Published online May 19, 2023
· Epigenetic mechanisms are involved in rapidly increasing food allergy.
· There is still no definitive way to diagnose food allergy.
· Early introduction of peanuts, eggs, and cow’s milk reduces food allergy incidence.
· Administration of probiotics such as Lactobacillus rhamnosus GG, Bifidobacterium bifidum can partially reduce the occurrence of allergic symptoms.
Review Article
Developmental and Behavioral Medicine
Spontaneous movements as prognostic tool of neurodevelopmental outcomes in preterm infants: a narrative review
Hyun Iee Shin, Myung Woo Park, Woo Hyung Lee
Clin Exp Pediatr. 2023;66(11):458-464.   Published online May 16, 2023
· Spontaneous movements can be useful to evaluate neuronal integrity in preterm infants.
· In General Movements Assessment, continuous cramped synchronized movements and absent fidgety movements can indicate high-risk infants for cerebral palsy.
· Recent advances in machine learning techniques have led to the automated prediction of cerebral palsy based on infantile spontaneous movements.
Letter to the Editor
Infection
Chest x-ray findings in children with COVID-19: lesson learned from referral hospitals in Medan, North Sumatera, Indonesia
Andrew Limavady, Eka Airlangga, Ririe Fachrina Malisie, Ayodhia Pitaloka Pasaribu
Clin Exp Pediatr. 2023;66(7):317-319.   Published online May 16, 2023
Original Article
Cardiology
Echocardiographic reference z scores of right ventricular dimension and systolic function of children aged 5–12 years
Alaba Busola Oladimeji, Moriam Omolola Lamina, Peter Odion Ubuane, Motunrayo Oluwabukola Adekunle, Omolara Adeolu Kehinde, Barakat Adeola Animasahun, Olisamedua FidelisNjokanma
Clin Exp Pediatr. 2023;66(5):215-222.   Published online April 18, 2023
Question: Z score reference values for right ventricular size and systolic function in children using echocardiography are available in several countries. Despite the high burden of diseases involving the right ventricle in Nigeria, these reference values have limited applicability.
Finding: The right ventricular sizes of Nigerian children differed from those published elsewhere.
Meaning: These reference values will aid the treatment, monitoring, and pre- and postintervention for Nigerian children.
Editorial
Infection
Impact and role of vitamins as immunonutrition in children during COVID-19 pandemic
Yoo Min Lee
Clin Exp Pediatr. 2023;66(5):212-214.   Published online April 18, 2023
· Vitamins have effector mechanisms in the innate and adaptive immune systems and potential roles in preventing and reducing the severity of coronavirus disease 2019 (COVID-19).
· Vitamins may be immunonutrients in the treatment of COVID-19 infections and prevention of patient deterioration due to critical illness, thus demonstrating the significance of a nutritious, well-balanced diet.
Neurology
Understanding the usefulness of electroencephalography source localization
Bo Lyun Lee
Clin Exp Pediatr. 2023;66(5):210-211.   Published online April 18, 2023
· Electroencephalography (EEG) records brain activity with high temporal resolution.
· EEG source localization, combined with other functional or structural imaging methods, provides information about brain network and connectivity in clinical neuroscience.
· EEG source localization identifies brain location from electrical current sources in several neuropsychiatric diseases such as epilepsy, attention deficit/hyperactivity disorder, and anxiety disorders.
Review Article
Cardiology
Arrhythmia and COVID-19 in children
Mi Kyoung Song, Bryan Kwon
Clin Exp Pediatr. 2023;66(5):190-200.   Published online April 18, 2023
· Pediatric patients have a relatively low incidence of tachyarrhythmia both in acute coronavirus disease 2019 and multisystem inflammatory syndrome in children (MIS-C), but it was associated with an increased risk of poor outcomes.
· Conduction abnormalities were not uncommon, especially in those with MIS-C. Most patients recovered to normal sinus rhythm; however, some progressed to advanced atrioventricular block and rarely required permanent pacemaker implantation.
Infection
COVID-19 in immunocompromised children and adolescents
Byung Ok Kwak, Byung Wook Eun
Clin Exp Pediatr. 2023;66(5):182-189.   Published online April 18, 2023
Most immunocompromised children and adolescents are not at increased risk of developing severe coronavirus disease 2019 (COVID-19). COVID-19 outcomes for low- or medium-risk immunocompromised children are favorable, while more serious illness reportedly occurs in high-risk immunocompromised children by underlying disease, its treatments, and other factors. Therefore, the early detection and timely management of severe COVID-19 and treatment of underlying disease are important. Hospitalization and COVID-19 vaccination should be carefully considered.
Perspective
Other
New public-centered child protection system in Korea
We Sun Shim
Clin Exp Pediatr. 2023;66(5):179-181.   Published online April 18, 2023
Korea’s child abuse response system was transformed under policy change in April 2020, from what was previously operated on a private-centered basis to a focus on the public sector with expanded role of local governments. Promising outcomes are expected with new system as greater governmental intervention will effectively protect at-risk children with acceleration in institutional collaboration and expertise in information management and administration.
Editorial
Other
Advancing pediatric health: the multifaceted scope of Clinical and Experimental Pediatrics
Jin Hee Oh, Man Yong Han
Clin Exp Pediatr. 2023;66(4):171-172.   Published online March 29, 2023
Clinical and Experimental Pediatrics (CEP) is a journal that specializes in pediatric research topics. It covers a wide range of research areas, including basic research, translational research, and research related to improving pediatric health and diseases. CEP also focuses on the coordination of societal structures and processes that orchestrate pediatric health and disease throughout society, and the parallel relationship between regional characteristics and globalization. The journal intends to continue promoting pediatric health through relentless efforts and the discovery of new research areas.
Clinical Note
Other
Novel PTRH2 gene variant causing IMNEPD (infantile-onset multisystem neurologic, endocrine, and pancreatic disease) in 2 Saudi siblings
Dalal K. Bubshait
Clin Exp Pediatr. 2023;66(5):223-225.   Published online March 23, 2023
Editorial
Gastroenterology
Is there a link between social media usage and functional gastrointestinal disorders in children?
Hae Jeong Lee
Clin Exp Pediatr. 2023;66(4):169-170.   Published online March 23, 2023
Social media use has potential benefits and risks, including links to adverse health problems in children such as functional gastrointestinal disorders (FGIDs). Screen time control, emotional support, and parental guidance can help children navigate social media safely and reduce the risk of developing FGIDs.
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.
Editorial
Nephrology (Genitourinary)
Optimal hemodialysis treatment for pediatric kidney failure patients
Yo Han Ahn
Clin Exp Pediatr. 2023;66(3):125-126.   Published online February 15, 2023
· Although the basic concept of hemodialysis (HD) is similar in adults and children, specific factors must be considered in the latter, including the small dialyzer and circuit, difficult vascular access, and frequent complications.
· HD-associated complications include catheter-related problems, hemodynamic instability, and neurodevelopmental and cognitive dysfunction.
· Pediatric HD is challenging, and steady efforts are needed to perform it safely and reduce its complications, thereby improving clinical outcomes.
Review Article
Neurology
Pediatric syncope: pearls and pitfalls in history taking
Jung Sook Yeom, Hyang-Ok Woo
Clin Exp Pediatr. 2023;66(3):88-97.   Published online February 15, 2023
An accurate diagnosis depends on correct history taking and its interpretation. An in-depth understanding of the symptoms of syncope in connection with its pathophysiology can lead to avoiding critical pitfalls in the diagnostic process of history taking.
Letter to the Editor
Endocrinology
Accuracy of predicted adult height using the Greulich-Pyle method and artificial intelligence medical device
Dongho Cho, Yun Sun Choi, Hayun Oh, Young min Ahn, Ji-Young Seo
Clin Exp Pediatr. 2023;66(3):145-147.   Published online January 25, 2023
Review Article
Infection
Pathogenetic and etiologic considerations of febrile seizures
Ji Yoon Han, Seung Beom Han
Clin Exp Pediatr. 2023;66(2):46-53.   Published online January 13, 2023
· Inflammatory responses accompanying fever increase neuronal excitability in the central nervous system, which in turn provokes seizures.
· Fever in children with febrile seizures is usually caused by common respiratory viruses, the distributions of which match those of seasonal community-acquired respiratory tract infections.
· Several genetic variations in ion channels seem associated with neuronal hyperexcitability in children with febrile seizures.
Endocrinology
Nonalcoholic fatty liver disease and insulin resistance in children
Kyungchul Song, Ho-Seong Kim, Hyun Wook Chae
Clin Exp Pediatr. 2023;66(12):512-519.   Published online January 9, 2023
· The prevalence of pediatric nonalcoholic fatty liver disease (NAFLD) increased from 8.2% in 2009 to 12.1% in 2018 in Korea.
· Laboratory tests, biomarkers, and imaging studies are used for the early detection of NAFLD.
· Insulin resistance is closely related to NAFLD.
Other
Hearing loss in neonates and infants
Goun Choe, Su-Kyoung Park, Bong Jik Kim
Clin Exp Pediatr. 2023;66(9):369-376.   Published online January 9, 2023
· Congenital hearing loss is common, with an approximate incidence of 1.5 per 1,000 newborns and affecting 1.2%–11% of preterm and 1.6%–13.7% of neonatal intensive care unit neonates.
· Etiologies vary, and up to 80% of cases are genetic.
· Newborn hearing screenings follow the 1-3-6 rule, and babies at high risk of hearing loss should be referred to otolaryngology for early detection and timely intervention.
Allergy
Recent topics on gastrointestinal allergic disorders
Yoshiyuki Yamada
Clin Exp Pediatr. 2023;66(6):240-249.   Published online January 9, 2023
Gastrointestinal (GI) allergies are divided into immunoglobulin E (IgE)-mediated, non-IgE-mediated, and mixed types. In addition to non-IgE-mediated, overlapping eosinophilic GI disorders (EGIDs) have increased in Japan. EGIDs, a mixed-type allergy category, include eosinophilic esophagitis (EoE) and non-EoE EGIDs. The number of EoE cases has increased in Western countries, followed by Asian countries. Recent GI allergies may also be associated with type 2 inflammation.
Gastroenterology
Update on eosinophilic gastrointestinal disease beyond eosinophilic esophagitis in children
Hye Ran Yang
Clin Exp Pediatr. 2023;66(6):233-239.   Published online January 3, 2023
· Eosinophilic gastrointestinal disease (EGID) is uncommon, with a prevalence of 1–30/100,000 in the general population; however, it is increasing worldwide.
· The diagnosis of EGID is based on histopathological findings of endoscopic mucosal biopsy in which tissue eosinophils are counted in each gastrointestinal tract segment of patients with chronic or recurrent gastrointestinal symptoms.
· Individualized treatment strategies, including adequate dietary and pharmacological therapy, may help improve outcomes of children with EGID.
Cardiology
Environmental changes surrounding congenital heart disease
Eun-Young Choi
Clin Exp Pediatr. 2023;66(8):332-338.   Published online January 2, 2023
· As the number of patients with congenital heart disease increases, the medical burden increases.
· Various fusion imaging techniques using percutaneous procedures have been introduced.
· With advances in technology, convenient ambulatory devices have been introduced.
· A well-organized team approach is required to resolve advanced heart failure in patients with congenital heart disease.
Neonatology (Perinatology)
Neurodevelopmental outcomes of preterm infants
In Gyu Song
Clin Exp Pediatr. 2023;66(7):281-287.   Published online December 30, 2022
· Among survivors, 60.9% of infants born at 22 weeks’ gestation had moderate to severe impairments, whereas 50.3% born at 23 weeks’ and 42.2% at 24 weeks’ gestation had moderate to severe impairments.
· Moderate and late preterm infants reportedly have less severe disease than very preterm infants, but they still experience adverse neurodevelopmental outcomes.
· The careful follow-up and early detection of developmental problems in these patients are required.
Clinical Note
Genetics and Metabolism
Biallelic POLR3A variants cause Wiedemann-Rautenstrauch syndrome with atypical brain involvement
Byungseung Moon, Minhye Kim, Hye Jin Kim, Jae So Cho, Hey Joon Son, Byung Chan Lim, Ki Joong Kim, Jong Hee Chae, Soo Yeon Kim
Clin Exp Pediatr. 2023;66(3):142-144.   Published online December 30, 2022
Review Article
Neurology
Electroencephalography source localization
Tae-Hoon Eom
Clin Exp Pediatr. 2023;66(5):201-209.   Published online December 29, 2022
· Electroencephalography (EEG) directly images the electrical activity of neurons at a higher temporal resolution than other neuroimaging techniques.
· EEG is still widely used in brain function research due to its advantages.
· Forward and inverse problems of EEG analyses require solutions.
· Methods such as the dipole and distributed source models have been introduced.
· Applications of EEG are expanding with the integration of other technologies and large-scale data.
Neonatology (Perinatology)
Treatment of congenital cytomegalovirus infection
Gyu Hong Shim
Clin Exp Pediatr. 2023;66(9):384-394.   Published online December 28, 2022
· Congenital cytomegalovirus (CMV) infection is among the most common causes of nongenetic sensorineural hearing loss.
· Congenital CMV is initially treated with intravenous ganciclovir for 2–6 weeks and switched to oral valganciclovir, or with oral valganciclovir for the entire 6-month period.
· Infants with congenital CMV require periodic monitoring of absolute neutrophil count, platelet count, and blood urea nitrogen, creatinine, liver function tests, audiological, ophthalmological, and developmental tests during antiviral medication.
Original Article
Infection
Seroprevalence of maternal peripartum human T-cell lymphotropic virus type-1 infection: a systematic review and meta-analysis of the Nigerian literature
Abdulrasheed Usman, Muhammad Hamis Musa, Bukhari Isah Shuaib, Olayemi Balogun, Mukhtar Adeiza
Clin Exp Pediatr. 2023;66(7):307-316.   Published online December 22, 2022
The peripartum period is an important transmission time for human T-cell lymphotropic virus-1 (HTLV-1) infection, mainly via breastfeeding and partly through the placental tissues of carrier mothers. Although most HTLV-1–infected individuals are asymptomatic, fetal and childhood infections often result in several diseases with disappointing treatment outcomes. An estimated HTLV-1 burden in Nigeria among perinatal women must be determined to enable rational planning of a comprehensive health care intervention.
Review Article
General Pediatrics
Korean Developmental Screening Test for Infants and Children (K-DST): development, applications, and implications for future early childhood development interventions
Dooyoung Kim, Young June Choe, Bilal Aurang Zeb Durrani, EunYoung Kim, Junghye Byeon, Baik-Lin Eun
Clin Exp Pediatr. 2023;66(7):288-293.   Published online December 22, 2022
· This review discusses the development and application of the Korean Developmental Screening Test for Infants and Children (K-DST) for ensuring early childhood development.
· Various studies have demonstrated the integral role of the K-DST in facilitating the detection of developmental delays and delivery of timely interventions.
· The tailoring of the K-DST to Korean infants and children suggests that other countries may further translate and adapt it.
Original Article
Infection
Predicting COVID-19 transmission in a student population in Seoul, South Korea, 2020–2021
Young Hwa Lee, Han Ho Kim, Young June Choe
Clin Exp Pediatr. 2023;66(4):173-178.   Published online December 22, 2022
Question: What is the spatial distribution and determinants of coronavirus disease 2019 (COVID-19) infection among students in Korea?
Finding: The community population was closely associated with the risk of COVID-19, and the number of students per school class were inversely associated with COVID-19 rates in students.
Meaning: Our finding suggests that controlling the community-level burden of COVID-19 can help prevent sudden acute respiratory syndrome coronavirus 2 infection in school-aged children.
Clinical characteristics of pediatric patients infected with SARS-CoV-2 versus common human coronaviruses: a national multicenter study
In Suk Sol, Eun Lee, Hyeon-Jong Yang, Yong Ju Lee, Hye Yung Yum, Mi-Hee Lee, Mi Ae Chu, Hui Jeong Moon, Hyo-Bin Kim, Ju Hee Seo, Jung Yeon Shim, Ji Young Ahn, Yoon Young Jang, Hai Lee Chung, Eun Hee Chung, Kyunghoon Kim, Bong-Seong Kim, Cheol Hong Kim, Yang Park, Meeyong Shin, Kyung Suk Lee, Man Yong Han, Soo-Jong Hong, Eun Kyeong Kang, Chang Keun Kim; on behalf of The Pneumonia & Respiratory Disease Study Group of Korean Academy of Pediatric Allergy and Respiratory Disease
Clin Exp Pediatr. 2023;66(3):134-141.   Published online December 22, 2022
Question: The clinical differences between severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) and human coronaviruses (HCoV) in children remain unknown.
Finding: This study compared the clinical findings of children infected with SARS-CoV-2 versus HCoV. Its findings suggest that children and adolescents with SARS-CoV-2 have a milder clinical course than those with HCoV.
Meaning: The clinical course of children and adolescents with SARS-CoV-2 should be closely monitored during the coronavirus disease 2019 pandemic.