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Clinical Note
Genetics and Metabolism
Happle-Tinschert syndrome in an infant: clinical, radiologic and genetic correlation
Belén Rodríguez-Sanchez, Francisco Javier Narbona-Cárceles, Jorge Martín-Nieto-González, Marina de la Puente-Alonso, Luis Zamarro-Díaz, Luis Jiménez-Briones, Julia Suárez-González, Francisco Arias-Lotto, Minia Campos-Domínguez
Clin Exp Pediatr. 2026;69(2):182-185.   Published online January 20, 2026
Original Article
Neonatology (Perinatology)
Hemodynamics and cerebral oxygenation in the neonatal transition: a prospective pilot study
Daniel Pfurtscheller, Christoph Schlatzer, Nina Höller, Bernhard Schwaberger, Lukas P. Mileder, Nariae Baik-Schneditz, Magdalena Holter, Gerhard Pichler
Clin Exp Pediatr. 2026;69(4):330-339.   Published online January 13, 2026
Question: How is arterial blood pressure related to cerebral oxygenation during the immediate postnatal transition in neonates?
Finding: Among preterm infants requiring respiratory support, cerebral oxygenation was associated with diastolic and mean arterial pressures, indicating passive pressure perfusion.
Meaning: Compromised preterm infants are vulnerable to impaired autoregulation with cerebral oxygenation fluctuations, highlighting the need for hemodynamic and cerebral monitoring plus routine monitoring of arterial oxygen saturation and heart rate.
Cardiology
Influence of atrial septal defect on mitral valve growth after repair of coarctation of the aorta or an interrupted aortic arch in infants
Yi-Chia Wang, Heng-Wen Chou, Chi-Hsiang Huang, Hsing-Hao Huang, Yih-Sharng Chen, En-Ting Wu, Shyh-Jye Chen, Ming-Tai Lin, Shuenn-Nan Chiu, Shu-Chien Huang
Clin Exp Pediatr. 2026;69(4):322-329.   Published online January 13, 2026
Question: Does atrial septal defect (ASD) physiology affect postrepair mitral valve growth in patients with coarctation of the aorta or an interrupted aortic arch?
Finding: Mitral valve growth occurred after biventricular repair but not single-ventricle palliation, particularly in patients with small valves and low ASD pressure gradients.
Meaning: The ASD pressure gradient determines mitral valve growth and should guide surgical strategies in patients with borderline hypoplastic left heart syndrome.
Hematology
Granulocyte transfusion improves survival in pediatric febrile neutropenia: a 15-year cohort study
Witsanu Phetsai, Kleebsabai Sanpakit, Jassada Buaboonnam, Kamon Phuakpet, Nassawee Vathana, Nattee Narkbunnam, Fon Kladed, Chayamon Takpradit
Clin Exp Pediatr. 2026;69(3):236-246.   Published online January 12, 2026
Question: Does granulocyte transfusion improve survival and clinical recovery in pediatric febrile neutropenia?
Finding: In this 15-year real-world cohort, granulocyte transfusion significantly increased 30-day survival (92.3 % vs. 65.4%; adjusted odds ratio, 0.105; P=0.020) and accelerated fever and neutrophil recovery without serious adverse events.
Meaning: Granulocyte transfusion may be an effective adjunctive therapy for severe neutropenic infections in children, particularly in low- and middle-income settings.
Guideline
Infection
Recommendation for use of 15- and 20-valent pneumococcal conjugate vaccines in Korean infants and children
Ki Wook Yun, Dong Hyun Kim, Jong Gyun Ahn, Byung-Wook Eun, Jin Lee, Jina Lee, Taek-Jin Lee, Hyunju Lee, Dae Sun Jo, Eun Young Cho, Hye-Kyung Cho, Soo-Han Choi, Young June Choe, Ui Yoon Choi, Yun-Kyung Kim; The Committee on Infectious Diseases of the Korean Pediatric Society
Clin Exp Pediatr. 2026;69(1):76-83.   Published online December 30, 2025
Compared to PCV13, PCV15 includes 2 (22F and 33F), and PCV20 includes 7 (8, 10A, 11A, 12F, 15B, 22F, and 33F) additional serotypes. The vaccination schedule remains the same: primary doses at 2, 4, and 6 months, and a booster at 12–15 months. If PCV13 was administered in the primary series, PCV15 and PCV20 may be used to complete it or as a booster.
Original Article
Neonatology (Perinatology)
Perinatal risk factors for hemodynamically significant patent ductus arteriosus in very low birth weight infants
Jie Hee Jue, So Young Shin, Jae Hyun Park, Chun Soo Kim, Hee Joung Choi
Clin Exp Pediatr. 2026;69(4):313-321.   Published online December 22, 2025
Question: What perinatal factors influence patent ductus arteriosus (PDA) in and improve outcomes of preterm infants?
Finding: Lower birth weight, frequent surfactant treatment, and maternal hypertension increased hemodynamically significant PDA risk in very low birth weight infants, whereas chorioamnionitis and premature rupture of membranes protected against it. A lower birth weight and incomplete antenatal steroid use increased the risk of surgical ligation, whereas small for gestational age reduced it.
Meaning: Recognizing these factors may enable early, targeted intervention and reduce the need for surgical management.
Prolonged cerebral oxygenation surveillance with algorithm-based management: a neurocritical care bundle for extremely preterm infants
Kai-Hsiang Hsu, Wei-Hung Wu, Shu-Yu Lin, Chih-Chen Chang, Mei-Yin Lai, I-Hsyuan Wu, Shih-Ming Chu, Ming-Chou Chiang, Reyin Lien
Clin Exp Pediatr. 2026;69(4):304-312.   Published online December 22, 2025
Question: Is prolonged monitoring of regional cerebral oxygen saturation (rcSO2) and hemodynamic parameters a feasible approach? Can these measures predict the neurological outcomes in extremely preterm infants?
Finding: We used a neurocritical care bundle from birth to discharge or term-equivalent age. Infants with poor outcomes had significantly lower rcSO2 values.
Meaning: Understanding rcSO2 and hemodynamic parameters may help manage cerebral hypoxia and reduce neurological complications in extremely preterm infants.
Thrombocytopenia in preterm infants born to mothers with systemic lupus erythematosus: a retrospective cohort study
Ru Xue, Guoqing Zhang, Xiafang Chen, Jun Bu, Lanlan Mi, Fei Bei
Clin Exp Pediatr. 2026;69(3):266-273.   Published online December 22, 2025
Question: What are the characteristics and clinical implications of thrombocytopenia in preterm neonates born to mothers with systemic lupus erythematosus?
Finding: Nearly one-third of preterm infants developed thrombocytopenia. Key modulators of this risk included gestational age, maternal hypertensive disorders of pregnancy, and hydroxychloroquine use. Thrombocytopenia may be associated with neonatal morbidity.
Meaning: Platelet count should be monitored during the first week of life, and infants should be assessed for potential complications.
Other
Improvements in obesity-related measures among Asian patients with severe obesity following a structured lifestyle intervention
Pei-Shan Chen, Shu-Mei Tsai, Chih-Hsuan Chang, Hui-Ru Yang, Yen-Ju Huang, Hsiang-Yin Liu, Kai-Chi Chang, Huey-Ling Chen
Clin Exp Pediatr. 2026;69(3):247-256.   Published online December 22, 2025
Question: How does obesity severity affect baseline fitness and improvements in key obesity-related measures following participation in a structured lifestyle modification program?
Finding: Severely obese youth showed poorer baseline physical fitness but greater improvements in key obesity-related measures following lifestyle interventions.
Meaning: Early targeted intervention may help prevent progression to more severe obesity and declines in physical fitness in patients with obesity.
Editorial
Allergy
Prioritizing maternal sleep: a public health strategy for preventing childhood allergic diseases
Eunchae Lee, Seohyun Hong, Dong Keon Yon
Clin Exp Pediatr. 2026;69(1):22-25.   Published online December 18, 2025
Sleep disorders affect more than half of pregnancies worldwide and can harm maternal health and offspring outcomes. Prioritizing maternal sleep as a public health strategy may help prevent prenatal and pediatric allergic diseases and reduce their burden. Other maternal health strategies may also reduce the burden of offspring allergic diseases, while adequate maternal sleep is associated with other offspring outcomes, underscoring its importance as a key public health strategy.
Review Article
Endocrinology
Pubertal induction in prepubertal males with hypogonadotropic hypogonadism: testosterone or gonadotropins?
Paolo Cavarzere, Riccardo Battiston, Valentina Lupieri, Valentina Mancioppi, Claudio Maffeis
Clin Exp Pediatr. 2026;69(1):1-10.   Published online December 18, 2025
The pubertal induction process in males still poses a challenge for pediatric endocrinologists. The existing literature is limited, and it is not yet possible to make definitive recommendations. We described the various treatment for this condition and tried to analyze the unresolved questions to address the question posed in the title of our manuscript.
Original Article
Gastroenterology
Longitudinal analysis of gut microbiota dysbiosis and bacterial signatures predictive of postoperative enterocolitis in children with Hirschsprung disease
Sireekarn Chantakhow, Chanon Kunasol, Jiraporn Khorana, Kanokkan Tepmalai, Nipon Chattipakorn, Siriporn C. Chattipakorn
Clin Exp Pediatr. 2026;69(3):214-227.   Published online December 10, 2025
Question: Do gut microbiota differ between patients with Hirschsprung disease (HSCR) and healthy children, and can specific bacterial taxa predict postoperative HSCRassociated enterocolitis (HAEC)?
Finding: Patients with HSCR showed gut dysbiosis with reduced diversity. Postoperative microbial changes included increased alpha diversity. Certain taxa, such as Eubacterium and Collinsella, were associated with recovery or HAEC.
Meaning: Distinct microbial signatures may help identify HAEC risk and guide microbiota-based strategies to improve outcomes.
Review Article
Gastroenterology
Ingestion of foreign bodies and caustic substances in children: a narrative review on clinical evaluation and management update
Maria Rogalidou
Clin Exp Pediatr. 2026;69(1):11-21.   Published online December 10, 2025
Foreign body and caustic substance ingestion in children aged 1–5 years can feature to severe and, sometimes life-threatening complications. High-risk items include batteries, magnets, and corrosive chemicals. Severity depends on object type, location, and ingestion timing. Prompt diagnosis and early endoscopic intervention are crucial. Individualized management, high clinical suspicion, and parental education are essential to improving outcomes and preventing immediate and long-term complications affecting a child’s quality of life.
Original Article
Gastroenterology
Progression from acute to chronic pancreatitis in children: a systematic review and meta-analysis
Endre Botond Gagyi, Mahmoud Obeidat, Edina Tari, Szilárd Váncsa, Dániel Sándor Veres, Peter Banovcin, Péter Jenő Hegyi, Péter Hegyi, Bálint Erőss
Clin Exp Pediatr. 2026;69(2):117-129.   Published online December 4, 2025
Approximately 1 in 5 children with acute pancreatitis develops recurrent attacks, and over one-third of such cases progress to chronic pancreatitis. Progression is closely linked to genetic mutations, particularly PRSS1, and anatomical abnormalities, whereas demographic and routine clinical factors lack predictive value. These results support early genetic and anatomical assessments, enabling targeted follow-ups and timely interventions in highrisk pediatric patients.
Clinical Note
Neonatology (Perinatology)
External tracheal compression and mucosal injury in a neonate with cervical teratoma: a rare airway challenge
Rhodora Guillen, Arijit Lodha, Prashanth Murthy
Clin Exp Pediatr. 2026;69(1):73-75.   Published online December 4, 2025
Original Article
Nephrology (Genitourinary)
Discordance between antibiotic therapy and recurrent urinary tract infections in young children with third-generation cephalosporin-resistant infections
Yusin Kim, Hyun A Lee, Gil Lee, Kyungseok Park, Ye Kyung Kim, Peong Gang Park
Clin Exp Pediatr. 2026;69(3):228-235.   Published online November 26, 2025
Question: Does completing a third-generation cephalosporin course, despite in vitro resistance, increase the early urinary tract infection recurrence rate in children?
Finding: Among 989 Korean children, discordant therapy increased the 2-month recurrence risk by 40% compared with concordant or susceptible therapy.
Meaning: Checking isolate susceptibility and switching to an active oral drug may curb recurrence and limit the use of broad-spectrum antibiotics.
Review Article
Neurology
Sacral dimple: clinical perspectives of lesions hidden beneath the skin
Jin Eun, Kwan Sung Lee, Seung Ho Yang
Clin Exp Pediatr. 2026;69(2):103-113.   Published online November 26, 2025
· Most sacral dimples are benign, but atypical features may indicate occult spinal dysraphism.
· Simple dimples meeting strict criteria require no imaging, whereas atypical dimples require targeted ultrasonography or magnetic resonance imaging.
· The early diagnosis and surgical management of highrisk cases prevents irreversible neurological, orthopedic, and urological deficits.
Editorial
Infection
Beyond COVID-19: meeting the challenge of evolving pediatric invasive group A streptococcal disease
Han Wool Kim
Clin Exp Pediatr. 2025;68(12):971-973.   Published online November 26, 2025
Pediatric for invasive group A Streptococcus has resurged globally with increasing severity and toxin-mediated presentations. Beta-lactams remain the first-line treatment, but linezolid has emerged as a safe alternative in cases refractory to β-lactams. Early intravenous immunoglobulin use may improve outcomes in severe streptococcal toxic shock syndrome cases, while C-reactive protein and procalcitonin aid early risk stratification. Integrating global surveillance and individualized therapy is crucial in the postpandemic era.
Original Article
General Pediatrics
Lipoprotein(a) prevalence trends in Portuguese children and adolescents: a real-world perspective
Isabel Morais Ribeiro, Susete Vieira, Miguel Saraiva, Mónica Tavares, José Carlos Oliveira, Isabel Mangas Palma, Helena Ferreira Mansilha
Clin Exp Pediatr. 2025;68(12):1031-1040.   Published online November 24, 2025
Early lipid screening, including lipoprotein(a) (Lp(a)), in children/adolescents is key to identifying and managing dyslipidemia and reducing the risk of early-onset cardiovascular disease. This study shows that prevalence of elevated Lp(a) in high-risk Portuguese children is alarming, with over 30% at intermediate/high risk and nearly 1% at very high-risk (>430 nmol/L). Since Lp(a) is mostly genetically determined, one-time early screening in atrisk children is crucial for timely monitoring and prevention.
Review Article
Oncology
Breaking the barrier: a guidelines-based review of antiangiogenesis drug resistance in pediatric cancer therapy
Nader Shakibazad, Mahdi Shahriari, Mani Ramzi
Clin Exp Pediatr. 2025;68(12):952-962.   Published online November 24, 2025
Antiangiogenic therapy resistance in pediatric cancers involves alternative angiogenic pathways, microenvironmental support, hypoxia-driven signaling, metabolic reprogramming, and structural adaptations such as vascular co-option. Metabolic adaptation highlights tumor plasticity. Effective treatments combine immunotherapy with biomarkers. To address vascular endothelial growth factor limitations, emerging targets include hypoxia-inducible factor-2α, endoglin, CXCR4, angiopoietin/Tie2, and bispecific antibodies. In resource-constrained settings, the guidelines recommend low-dose chemotherapy plus oral multiantiangiogenic agents to ensure improved accessibility and treatment outcomes.
Original Article
Other
Comparing ethyl chloride and 10% lignocaine spray for pediatric intravenous cannulation pain relief
Susmitha Vellanki, Malavika Kulkarni, H.D. Arun Kumar, Deepali Shetty, Nikhil Karthik B, Mathew Tom
Clin Exp Pediatr. 2026;69(1):65-72.   Published online November 21, 2025
Background: Intravenous cannulation (IVC) is a routine yet distressing procedure in pediatric patients, often provoking significant anxiety and procedural pain. Although eutectic mixtures such as eutectic mixture of local anesthetic cream are widely used, their delayed onset limits their applicability in time-sensitive settings. Ethyl chloride vapocoolant spray and 10% lignocaine spray have been proposed as rapid-onset alternatives, yet direct comparative...
General Pediatrics
Global and regional burden of neonatal disorders (preterm birth, encephalopathy, jaundice, and sepsis), 1990–2021 and projections to 2050
Yuseon Kang, Jeongseon Oh, Dongjin Yeo, Jaeyu Park, Sooji Lee, Na Yun Kim, Jungmin Park, Seung Ha Hwang, Tae Hyeong Kim, Dong Keon Yon
Clin Exp Pediatr. 2026;69(2):171-181.   Published online October 30, 2025
This study provides the first comprehensive estimated global burden of neonatal disorders attributable to risk factors in 1990–2021 stratified by sex, cause, sociodemographic index (SDI), and region. We identified persistent disparities across SDI levels, with low birthweight and short gestation contributing most to the age-standardized disability-adjusted life year rate of neonatal disorders. These findings highlight the urgent need for targeted context-specific interventions to reduce infant mortality and improve neonatal health equity.
Bifidobacterium animalis subsp. lactis BLa80 for preventing allergic, respiratory, and gastrointestinal diseases in young children in China: a randomized double-blind placebo-controlled trial
Ke Chen, Xi Zhang, Kaihong Zeng, Jiayi Zhong, Shanshan Jin, Yang Nie, Ping Yang, Nianyang He, Haixia Chen, Yanmei Cao, Yunrong Fu, Ziji Fang, Wei Jiang, Changqi Lium
Clin Exp Pediatr. 2026;69(2):150-162.   Published online October 30, 2025
Question: Can probiotic BLa80 bring long-term benefits to the health of young children?
Finding: This trial demonstrated that the daily administration of s BLa80 at 5×109 colony-forming units for 3 months in children can reduce the risk of eczema, upper respiratory tract infections, and acute tracheitis/bronchitis as well as beneficially improve the gut microbiome without any adverse effect.
Meaning: Bla80 can bring definite health benefits to young children.
Critical Care Medicine
Telemedicine outcome of mechanically ventilated children in Brazilian pediatric intensive care units
Aristóteles de Almeida Pires, Luciano Remião Guerra, João Ronaldo Mafalda Krauzer, Luciane Gomes da Cunha, Mariana Motta Dias da Silva, Vanessa Cristina Jacovas, Hilda Maria Rodrigues Moleda Constant, Taís de Campos Moreira, Paulo Márcio Pitrez, Felipe Cezar Cabral
Clin Exp Pediatr. 2026;69(2):140-149.   Published online October 23, 2025
Question: Telemedicine interventions in Brazilian public pediatric intensive care units effectively address the challenges related to specialized care provision in resource-limited settings.
Finding: The implementation of telemedicine significantly reduced overall mortality rates among mechanically ventilated children (from 20.7% to 10.4%) and increased ventilator-free days from 3 (interquartile range, 0–7) to 4 (interquartile range, 2–8) days.
Meaning: These findings support telemedicine as a viable strategy for enhancing pediatric critical care in public health systems, particularly by improving patient outcomes.
Nephrology (Genitourinary)
Assessing kidney outcomes in childhood-onset lupus nephritis: role of National Institutes of Health-modified histological indices
Nuanpan Penboon, Pornpimol Rianthavorn
Clin Exp Pediatr. 2026;69(2):130-139.   Published online October 23, 2025
Question: In children with proliferative lupus nephritis, do National Institutes of Health-modified indices and treatment choices predict long-term kidney function?
Finding: Higher chronicity index scores, especially tubular atrophy and interstitial fibrosis, predicted kidney impairment. Additionally, the use of mycophenolate mofetil (MMF) for maintenance therapy was associated with a lower risk of kidney function decline.
Meaning: The early recognition of chronic lesions and MMF-based maintenance therapy may improve kidney outcomes in childhood-onset lupus nephritis.
Editorial
Endocrinology
Rickets prevalence and treatment outcome: real-world data from Taiwan
Young Suk Shim
Clin Exp Pediatr. 2025;68(11):868-870.   Published online October 23, 2025
Rickets should be recognized as a significant public health concern during infancy and childhood. Recent studies from Taiwan have demonstrated a steady increase in the prevalence of nutritional rickets, and a similar trend is likely to emerge in Korea. Therefore, comprehensive clinical evaluation and appropriate biochemical assessment are essential to prevent long-term skeletal and systemic complications. Prompt diagnosis and timely initiation of appropriate treatment are crucial.
Original Article
General Pediatrics
Associations of routine breakfast and napping habits with early adiposity rebound by age 3 years: a population-based cohort study in Japan
Toshifumi Yodoshi
Clin Exp Pediatr. 2026;69(2):163-170.   Published online October 22, 2025
In a population‑based cohort of 74,466 children, 25% experienced early adiposity rebound (AR) by age 3. Daily breakfast and routine napping at 1.5 years were independently associated with lower odds of AR, while obesity at 1.5 years was a strong predictor. These modifiable routines could help delay AR and enable early identification during routine child health checks.
Critical Care Medicine
High-dose methylprednisolone and tocilizumab improve survival of patients with high-risk pediatric acute necrotizing encephalopathy
Chaonan Fan, Fei Li, Kechun Li, Zheng Li, Yiyang Mao, Lijuan Wang, Gang Liu, Yingchao Liu, Quan Wang, Suyun Qian
Clin Exp Pediatr. 2026;69(1):56-64.   Published online October 22, 2025
Question: Which immunomodulatory strategies can reduce mortality in children with acute necrotizing encephalopathy (ANE)?
Finding: High-dose methylprednisolone (30 mg/kg/day) significantly improved the survival of high-risk patients, particularly when combined with tocilizumab.
Meaning: These findings support the use of a severity-based immunotherapy approach to optimize the outcomes of pediatric ANE.
Rheumatology
Recurrent immunoglobulin A vasculitis in children and adolescents: prevalence and associated risk factors
Nootsara Atchariyaphuk, Maynart Sukharomana, Thanaporn Chaiyapak, Sirirat Charuvanij
Clin Exp Pediatr. 2026;69(1):46-55.   Published online October 22, 2025
Question: What can predict immunoglobulin A vasculitis (IgAV) recurrence, and when does it occur? How do childhood- and adolescent-onset IgAV compare?
Finding: The IgAV recurrence rate was 35.6%. It usually occurred within 12 months and was associated with corticosteroids treatment.
Meaning: Childhood-onset IgAV more commonly featured gastrointestinal and musculoskeletal manifestations and required hospitalization. Adolescent-onset IgAV more commonly featured renal involvement. Vigilant monitoring for recurrence is necessary, particularly with corticosteroids treatment.
Allergy
Maternal sleep disorders during pregnancy and subsequent risk of allergic diseases in Japanese children: the TMM BirThree Cohort Study
Ami Uematsu, Masatsugu Orui, Mami Ishikuro, Keiko Murakami, Aoi Noda, Genki Shinoda, Taku Obara, Shinichi Kuriyama
Clin Exp Pediatr. 2026;69(1):36-45.   Published online October 22, 2025
Question: Associations have been made between maternal sleep disorders during pregnancy and allergic diseases including bronchial asthma, atopic dermatitis, food allergy, and allergic conjunctivitis/rhinitis/hay fever in their children.
Finding: In the crude model, sleep disorders during pregnancy were associated with all examined allergic diseases in children. After adjustment, significant associations remained for atopic dermatitis and allergic conjunctivitis/rhinitis/hay fever.
Meaning: The study highlights associations between maternal sleep and child allergic diseases.


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