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Clinical Manifestations of Eosinophilic Esophagitis in Children and Adolescents: A Single-Center, Matched Case-Control Study

Roh JH, Ryoo E, Tchah H

Purpose: To examine the prevalence and clinical manifestations of eosinophilic esophagitis (EoE) in Korea children. Methods: The study was designed as a 1:2 matching case-control study. Using information from the endoscopic...
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A rare presentation of Rapunzel syndrome with multiple small bowel intussusceptions

Min KJ, Tchah H, Kim SM, Choi JY

Rapunzel syndrome is caused by gastric trichobezoar with extended tail and small bowel obstruction. Patients with gastric trichobezoar can be asymptomatic until the bezoar increases in size. We report a...
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Epidemiology of Staphylococcus aureus Bacteremia in Children at a Single Center from 2002 to 2016

Lim S, Ha SG, Tchah H, Jeon IS, Ryoo E, Son DW, Cho HJ, Sun YH, Kim HJ, Ahn JM, Cho HK

PURPOSE: We aimed to investigate the epidemiological characteristics of Staphylococcus aureus bacteremia in Korean children. METHODS: We retrospectively collected and analyzed data from the medical records of the patients with S....
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Analysis of Positional Relationships of Various Centers in Cataract Surgery

Song WK, Lee JA, Kim JY, Kim MJ, Tchah H

PURPOSE: To analyze the positional relationships of various centers in patients undergoing femtosecond laser-assisted cataract surgery (FLACS). METHODS: The locations of the pupil center (PC), limbal center (LC) and lens center...
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Significance of Perianal Lesion in Pediatric Crohn Disease

Jin WS, Park JH, Lim KI, Tchah H, Ryoo E

PURPOSE: Despite the increasing incidence of pediatric Crohn disease (CD) in Korea, data on the characteristics of perianal lesions are scarce. Therefore, we aimed to investigate the characteristics of pediatric...
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Reduction of Blue Light Emission in Internet-protocol Television and Its Effect on Ocular Fatigue

Kim H, Kim HT, Shin DH, Lim HT, Choi CY, Cho WJ, Kim JY, Kim CY, Tchah H

PURPOSE: The blue light emitted from electronic devices may be harmful to the eye. We investigated whether internet-protocol television (TV) with lowered blue light emission reduced ocular fatigue. METHODS: A total...
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Clinical Effects of an Improved Pump Reaction Rate and Automatic Occlusion Sensing System in Phacoemulsification

Kim YN, Lee JA, Kim JY, Kim MJ, Tchah HW

PURPOSE: A recently introduced phacoemulsification system, the WhiteStar Signature® PRO, has demonstrated improved nucleus followability and cutting efficiency via an improved pump regulator with a higher reaction response and an...
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Therapeutic Efficacy and Safety of Prolonged Macrolide, Corticosteroid, Doxycycline, and Levofloxacin against Macrolide-Unresponsive Mycoplasma pneumoniae Pneumonia in Children

Ha SG, Oh KJ, Ko KP, Sun YH, Ryoo E, Tchah H, Jeon IS, Kim HJ, Ahn JM, Cho HK

BACKGROUND: We aimed to compare the therapeutic efficacy of prolonged macrolide (PMC), corticosteroids (CST), doxycycline (DXC), and levofloxacin (LFX) against macrolide-unresponsive Mycoplasma pneumoniae (MP) pneumonia in children and to evaluate...
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Association between Minimal Change Esophagitis and Gastric Dysmotility: A Single-Center Electrogastrography and Endoscopy Study in Children

Lim KI, Shim SB, Tchah H, Ryoo E

PURPOSE: Minimal change esophagitis (MCE) is a reflux disease without mucosal breaks, known to be partially associated with abnormal gastric motor function. Electrogastrography (EGG) is commonly applied to assess gastric...
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Comparison of etiology and clinical presentation between children with laryngotracheobronchopneumonitis and croup

Kim EJ, Nam H, Sun YH, Tchah H, Ryoo E, Cho HK, Cho HJ, Son DW

PURPOSE: Croup, a common childhood respiratory illness with various severities, has many unanswered questions. Laryngotracheobronchopneumonitis (LTBP) is a disease entity considered to be an extension of croup to the lower...
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Bannayan-Riley-Ruvalcaba Syndrome in a Patient with a PTEN Mutation Identified by Chromosomal Microarray Analysis: A Case Report

Lee SH, Ryoo E, Tchah H

Bannayan-Riley-Ruvalcaba syndrome (BRRS) is one of the phosphatase and tensin homolog hamartoma tumor syndrome with a PTEN gene mutation. It is a rare dominant autosomal disorder characterized by cutaneous lipomas,...
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Effect of Metronidazole in Infants with Bowel Habit Change: Irrelative to the Clostridium difficile Colonization

Kim EJ, Lee SH, Tchah H, Ryoo E

PURPOSE: Clinical symptoms associated with Clostridium difficile infection (CDI) can vary widely. Carrier state without apparent symptoms is relatively common during infancy. The objective of this study was to determine...
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Management of Complication after Hyperopic Laser-assisted in-situ Keratomileusis

Jo J, Park JH, Tchah HW, Kim MJ

PURPOSE: We present a case of a patient who underwent corneal refractive surgery to improve their corrected visual acuity due to a complication of hyperopic laser-assisted in-situ keratomileusis (LASIK). CASE SUMMARY:...
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Clinical Outcomes of Cataract Surgery Using Nasal Clear Corneal Incision: Safety and Efficacy

Song M, Park JH, Kim JY, Kim MJ, Tchah H

PURPOSE: To compare the safety and efficacy of cataract surgery using nasal clear corneal incision (CCI) versus superior or temporal CCIs in Korean patients. METHODS: A retrospective comparative study was conducted....
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Validity of Tono-pachymetry for Measuring Corrected Intraocular Pressure in Non-surgical and Post-photorefractive Keratectomy Eyes

Hahn IK, Kim JY, Kim MJ, Tchah H, Moon CH

PURPOSE: To assess the validity of central corneal thickness (CCT) and corrected intraocular pressure (IOP) values obtained by tono-pachymetry in non-surgical and post-photorefractive keratectomy (PRK) eyes. METHODS: For the study, 108...
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Characteristics of Upper Gastrointestinal Tract Involvement in Korean Pediatric Crohn's Disease: A Multicenter Study

Park JH, Nam HN, Lee JH, Hong J, Yi DY, Ryoo E, Jeon IS, Tchah H

PURPOSE: Crohn's disease (CD) can involve any site of the gastrointestinal tract (GIT). However, the characteristics of upper GIT involvement in CD are unclear, especially in the Eastern pediatric population....
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Non-Responders to Intravenous Immunoglobulin and Coronary Artery Dilatation in Kawasaki Disease: Predictive Parameters in Korean Children

Kim BY, Kim D, Kim YH, Ryoo E, Sun YH, Jeon IS, Jung MJ, Cho HK, Tchah H, Choi DY, Kim NY

BACKGROUND AND OBJECTIVES: In Kawasaki disease (KD), high dose intravenous immunoglobulin (IVIG) significantly lowers the coronary complications. However, some patients either do not respond to initial therapy or develop coronary...
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Association between Elevated Alanine Aminotransferase and Urosepsis in Children with Acute Pyelonephritis

Kim D, Lee SH, Tchah H, Ryoo E, Cho HK, Kim YM

PURPOSE: The aim of this study is to investigate the association between elevated alanine aminotransferase (ALT) and urosepsis in children with acute pyelonephritis (APN). METHODS: We retrospectively identified all children who...
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Occurrence Pattern of Intussusception according to the Introduction of Rotavirus Vaccine: An Observational Study at a University Hospital

Nam HN, Lim KI, Tchah H, Ryoo E, Sun YH, Cho HK

PURPOSE: Rotavirus vaccine (RV) was introduced in Korea since 2007, and intussusception (IS) remains an important safety concern. This study investigated the trend of IS occurrence related to RV as...
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Early onset of colorectal cancer in a 13-year-old girl with Lynch syndrome

Ahn DH, Rho JH, Tchah H, Jeon IS

Lynch syndrome is the most common inherited colon cancer syndrome. Patients with Lynch syndrome develop a range of cancers including colorectal cancer (CRC) and carry a mutation on one of...
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