Publications by authors named "Yeoun Joo Lee"

: Transpyloric (TP) feeding tube placement is a viable nutritional strategy in low birth weight infants (LBWIs) with severe gastroesophageal reflux or feeding intolerance. However, technical challenges are encountered in patients of this age group due to their small body size and the limited availability of appropriately sized equipment. We retrospectively reviewed 15 endoscopic TP tube placements performed in 12 LBWIs weighing less than 2.

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Background & Aims: Proactive dosing based on therapeutic drug monitoring (TDM) of adalimumab is associated with higher rates of sustained corticosteroid-free clinical remission (SCFCR) in children with Crohn's disease (CD) than that with reactive TDM. We aimed to investigate whether proactive dosing of infliximab (IFX) based on TDM is associated with higher rates of endoscopic healing (EH) in pediatric patients with CD than that with clinically based dosing.

Methods: We conducted a non-blinded, randomized controlled trial of 112 biologic-naïve children with CD who had responded to IFX induction treatment at 4 centers in South Korea between July 2017 and November 2020.

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Growth charts are important tools used to evaluate the growth status of children and estimate the nutritional and health status of the general population. In Korea, the national standardized growth charts were updated in 2017. However, the growth charts developed by the World Health Organization (WHO) are being adopted for children under 3 years of age despite a lack of evidence for their applicability to Koreans.

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Background: We aimed to investigate the characteristics of pediatric ulcerative colitis (UC) at diagnosis in Korea.

Methods: This was a multicenter, registry-based, inception cohort study conducted in Korea between 2021 and 2023. Children and adolescents newly diagnosed with UC < 18 years were included.

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Purpose: To date, there is no region-specific guideline for pediatric endoscopy training. This study aimed to illustrate the current status of pediatric endoscopy training in Asia-Pacific region and identify opportunities for improvement.

Methods: A cross-sectional survey, using a standardized electronic questionnaire, was conducted among medical schools in the Asia-Pacific region in January 2024.

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Article Synopsis
  • - The study aimed to compare the effectiveness of CT-P13, a biosimilar to the original infliximab (IFX), on endoscopic healing (EH) and drug retention in children with inflammatory bowel disease (IBD).
  • - Researchers analyzed data from 416 pediatric IBD patients, finding no significant differences in clinical outcomes or adverse effects between those receiving the IFX originator and CT-P13 at one-year follow-up.
  • - Both treatments showed similar drug retention rates, with CT-P13 slightly outperforming the IFX originator in both Crohn's disease and ulcerative colitis cases, indicating comparable therapeutic responses.
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Background: Several cases of pediatric acute hepatitis of unknown etiology related to adenoviral infections have been reported in Europe since January 2022. The aim of this study was to compare the incidence, severity, possible etiology, and prognosis of the disease with those in the past in Korea.

Methods: The surveillance group collected data between May and November 2022 using a surveillance system.

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Background/aims: The recent update on the Selecting Therapeutic Targets in Inflammatory Bowel Disease initiative has added normal growth in children as an intermediate target in Crohn's disease and ulcerative colitis. We aimed to investigate factors associated with reaching mid-parental height (MPH) in patients diagnosed with inflammatory bowel disease in childhood and the adolescent period.

Methods: This multicenter retrospective observational study included pediatric patients with inflammatory bowel disease that had reached adult height.

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Studies comparing the detection of clean mucosal areas in capsule endoscopy (CE) using human judgment versus artificial intelligence (AI) are rare. This study statistically analyzed gastroenterologist judgments and AI results. Three hundred CE video clips (100 patients) were prepared.

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Article Synopsis
  • Endoscopic removal of foreign bodies (FBs) in children is common, particularly with coins being the most frequently swallowed item.
  • A study analyzed 424 procedures and found the average patient age was 4.1 years, with FBs mainly located in the esophagus and stomach.
  • The use of retrieval nets for gastric FBs significantly reduced the procedure time for low-weight children compared to forceps.
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Background: Protein-losing enteropathy (PLE), a rare condition with excessive gastrointestinal protein loss, presents with hypoalbuminemia, edema, or ascites. Several cases of PLE combined with severe iron deficiency anemia (IDA) have been reported in infants and toddlers that were considered to result from excessive cow's milk consumption, although the mechanism has not been clearly established.

Methods: We retrospectively reviewed the clinical, laboratory, endoscopic, and radiologic characteristics of patients diagnosed and treated for PLE with IDA between 2015 and 2021.

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Article Synopsis
  • The study investigates the impact of the COVID-19 pandemic on pediatric inflammatory bowel disease (PIBD) in South Korea, focusing on trends from 2018 to 2021.
  • It analyzed data from 486 patients, revealing a significant increase in PIBD cases, with changes in disease severity and management strategies post-pandemic.
  • The initial treatment for Crohn's disease shifted towards more enteral nutrition and infliximab use, while medication like 5-ASA and steroids declined, highlighting the need for updated treatment guidelines for PIBD.
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Purpose: This study evaluated the predictive role of fecal calprotectin (FC) measured at an early stage of treatment for monitoring clinical remission (CR) after six months and endoscopic remission (ER) after one year of treatment in pediatric Crohn's disease (CD).

Methods: This retrospective study included 45 patients who simultaneously underwent ileocolonoscopy and FC testing during follow-up. FC levels were measured before and after six weeks of treatment.

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Background/aims: We aimed to compare the differences in pediatric Crohn's disease (CD) and ulcerative colitis (UC) at diagnosis in Korea.

Methods: This was a multicenter, registry-based, inception cohort study conducted at five centers in Korea between 2013 and 2017. Baseline demographics, clinical characteristics, and results from laboratory, endoscopic, radiologic examinations were compared between pediatric CD and UC patients who were <19 years old at diagnosis.

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Background: Magnetic resonance enterography (MRE) and capsule endoscopy (CE) are currently used for the evaluation of small bowel involvement in pediatric Crohn's disease (CD). Several studies have been conducted to investigate the usefulness and diagnostic accuracy of each test. However, only a few studies have been conducted to compare the performance of both tests in the assessment of pediatric small bowel CD upon diagnosis and during follow-up.

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: Capsule endoscopy (CE) for bowel cleanliness evaluation primarily depends on subjective methods. To objectively evaluate bowel cleanliness, we focused on artificial intelligence (AI)-based assessments. We aimed to generate a large segmentation dataset from CE images and verify its quality using a convolutional neural network (CNN)-based algorithm.

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This study assessed the image quality and diagnostic accuracy in determining disease activity of the terminal ileum of the reduced-dose computed tomography enterography using model-based iterative reconstruction in pediatric patients with Crohn's disease (CD). Eighteen patients were prospectively enrolled and allocated to the standard-dose (SD) and reduced-dose (RD) computed tomography enterography (CTE) groups (n = 9 per group). Image quality, reader confidence in interpreting bowel findings, accuracy in determining active CD in the terminal ileum, and radiation dose were evaluated.

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Ingestion of foreign bodies (FBs) is a common phenomenon among young children. Plain radiography is the first step diagnostic modality to detect the radio-opaque FBs. And computed tomography has been recommended by several guidelines as useful modalities for diagnosing ingested FBs.

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Gastrostomy with concurrent laparoscopic Nissen fundoplication (LNF) is often performed as a laparoscopic gastrostomy (LG) by surgeons. Since 2014, we started performing percutaneous endoscopic gastrostomy (PEG) as gastrostomy with LNF. This study aims to compare the outcomes of LG and PEG with LNF.

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Purpose: Some patients with neonatal seizures show diffuse, symmetric diffusion-restricted lesions in the cerebral white matter. The aim of this study was to describe clinical and imaging findings of patients with neonatal seizures who had diffuse, symmetric diffusion-restricted lesions without any structural or metabolic etiology.

Materials And Methods: A total of 56 neonates aged less than 1 week underwent brain magnetic resonance imaging (MRI) for evaluation of seizures from November 2008 to February 2017.

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Objectives: Monogenic diabetes includes a group of heterogeneous diabetes types. We aimed to identify the frequency, clinical and molecular features of monogenic diabetes in a Korean pediatric cohort.

Methods: A retrospective cohort and multicenter study of Korean children suspected to have monogenic diabetes, managed by four pediatric endocrine centers in the southeast region of South Korea, from February 2016 to February 2020.

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Purpose: We investigated the clinical features and factors affecting the choice of treatment modality and the course of pediatric gallstone (GS) disease.

Methods: We retrospectively analyzed the medical records of 65 patients diagnosed with GS using imaging studies between January 2009 and December 2017 were included.

Results: This study included 65 patients (33 boys and 32 girls; mean age, 8.

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Background: Non-adherence to oral maintenance therapy in adolescents with inflammatory bowel disease (IBD) is a significant healthcare problem. Knowledge of the prescribed medication can increase medication adherence. We aimed to investigate the relationship between medication adherence and disease-related knowledge of pediatric and adolescent patients with IBD.

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Prader-Willi syndrome (PWS), an imprinting disorder, results from the loss of expression of a paternal gene on chromosome 15q11-q13. Progressive obesity and its associated complications lead to increased morbidity and early death in PWS patients. The management techniques available for morbid obesity in adolescents and adults with PWS are limited.

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Klippel-Trenaunay syndrome (KTS) is a rare disorder characterized by a triad of abnormal bone and soft tissue growth, the presence of a port-wine stain, and venous malformations. Gastrointestinal (GI) manifestations of KTS are relatively common and generally do not cause significant problems. However, persistence can lead to chronic GI blood loss or even massive bleeding in rare cases.

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