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Original Article
Clinical outcome of transcatheter closure of patent ductus arteriosus in small children weighing 10 kg or less
Young A Park, Nam Kyun Kim, Su-Jin Park, Bong Sic Yun, Jae Young Choi, Jun Hee Sul
Clin Exp Pediatr. 2010;53(12):1012-1017.   Published online December 31, 2010
Purpose

Transcatheter closure has become an effective therapy in most patients with patent ductus arteriosus (PDA). However, there are difficulties in transcatheter closure of PDA in small children. We reviewed clinical outcomes of transcatheter closure of PDA in children weighing less than 10 kg in a single center.

Methods

Between January 2003 and December 2009, 314 patients with PDA underwent transcatheter closure in...

Risk factors of ocular involvement in children with mitochondrial respiratory chain complex defect
Jung Hyun Chae, Jung Hun Lee, Kyo Ryung Kim, Suk Ho Byeon, Young Mock Lee, Hoon Chul Kang, Joon Soo Lee, Heung Dong Kim
Clin Exp Pediatr. 2010;53(12):994-999.   Published online December 31, 2010
Purpose

Mitochondrial dysfunction can present with various symptoms depending on the organ it has affected. This research tried to analyze the ophthalmologic symptoms and ophthalmologic examination (OE) results in patients with mitochondrial disease (MD).

Methods

Seventy-four patients diagnosed with mitochondrial respiratory chain complex defect with biochemical enzyme assay were included in the study. They were divided into 2 groups based on the OE...

Case Report
A case of intracranial hemorrhage in a neonate with congenital factor VII deficiency
Won Seok Lee, Young Sil Park
Clin Exp Pediatr. 2010;53(10):913-916.   Published online October 31, 2010

Congenital factor VII deficiency is a rare autosomal-recessive bleeding disorder. Bleeding manifestations and clinical findings vary widely, ranging from asymptomatic subjects to patients with hemorrhages that may cause significant handicaps. Treatment has traditionally involved factor VII(FVII) replacement therapy using fresh frozen plasma, prothrombin complex concentrates or plasma-derived FVII concentrates. Recombinant activated FVII (NovoSeven®) is currently considered the first-line treatment for...

Original Article
Multiple births conceived by assisted reproductive technology in Korea
Young Sil Park, Sun Hee Choi, Kye Shik Shim, Ji Young Chang, Won Ho Hahn, Yong Sung Choi, Chong-Woo Bae
Clin Exp Pediatr. 2010;53(10):880-885.   Published online October 31, 2010
Purpose

The recent trends of multiple births (MBs) conceived by assisted reproductive technology (ART) in Korea were analyzed as well as the relationship with maternal age, especially advanced maternal age.

Methods

Data were obtained from the Korean Statistical Information Service and annual ART reports from the ART committee of the Korean Society of Obstetrics and Gynecology.

Results

MBs increased from the early 1990s; there was...

Review Article
Treatment of obstructive sleep apnea in children
Young Min Ahn
Clin Exp Pediatr. 2010;53(10):872-879.   Published online October 31, 2010

Obstructive sleep apnea (OSA) in children is a frequent disease for which optimal diagnostic methods are still being defined. Treatment of OSA in children should include providing space, improving craniofacial growth, resolving all symptoms, and preventing the development of the disease in the adult years. Adenotonsillectomy (T&A) has been the treatment of choice and thought to solve young patient's OSA...

Obstructive sleep apnea syndrome in children: Epidemiology, pathophysiology, diagnosis and sequelae
Sun Jung Chang, Kyu Young Chae
Clin Exp Pediatr. 2010;53(10):863-871.   Published online October 31, 2010

The prevalence of pediatric obstructive sleep apnea syndrome (OSAS) is approximately 3% in children. Adenotonsillar hypertrophy is the most common cause of OSAS in children, and obesity, hypotonic neuromuscular diseases, and craniofacial anomalies are other major risk factors. Snoring is the most common presenting complaint in children with OSAS, but the clinical presentation varies according to age. Agitated sleep with...

Case Report
Transient splenial lesion of the corpus callosum in a case of benign convulsion associated with rotaviral gastroenteritis
Yoon Young Jang, Kye Hyang Lee
Clin Exp Pediatr. 2010;53(9):859-862.   Published online September 13, 2010

Transient magnetic resonance (MR) signal changes in the splenium of the corpus callosum (SCC) arise from many different conditions, including encephalopathy or encephalitis caused by infection, seizures, metabolic derangements, and asphyxia. Few case reports exist on reversible SCC lesions associated with rotavirus infection. A benign convulsion with mild gastroenteritis (CwG) is frequently associated with rotaviral infections. This entity is characterized...

Original Article
Microalbuminuria in children with urinary tract infection
Byung Ok Kwak, Sochung Chung, Kyo Sun Kim
Clin Exp Pediatr. 2010;53(9):840-844.   Published online September 13, 2010
Purpose

Microalbuminuria is defined as increased urinary albumin excretion (30-300 mg/day) or microalbumin/creatinine ratio (30-300 mg/g) in a spot urine sample. Although microalbuminuria is a predictor of clinical nephropathy and cardiomyopathy, few studies have investigated microalbuminuria in children with urinary tract infection (UTI).

Methods

Therefore, we compared the spot urine microalbumin/creatinine ratio in pediatric UTI patients with that of control subjects. We investigated...

Increased B cell-activating factor (BAFF) level in the sputum of children with asthma
Hye Mi Jee, Bong Seok Choi, Kyung Won Kim, Myung Hyun Sohn, Man Yong Han, Kyu-Earn Kim
Clin Exp Pediatr. 2010;53(8):795-800.   Published online August 31, 2010
Purpose

B cell-activating factor (BAFF) is a tumor-necrosis factor (TNF) superfamily member best known for its role in the survival and maturation of B cells. BAFF activity is observed in naïve cells as well as in effector/memory T cells. We aimed to explore whether BAFF in sputum is expressed at elevated levels in asthmatic airways and associated with eosinophilic inflammation, pulmonary...

Review Article
Disease-specific pluripotent stem cells
Hoon-Chul Kang
Clin Exp Pediatr. 2010;53(8):786-789.   Published online August 31, 2010

Induced pluripotent stem (iPS) cells are generated by epigenetic reprogramming of somatic cells through the exogenous expression of transcription factors. Recently, the generation of iPS cells from patients with a variety of genetic diseases was found to likely have a major impact on regenerative medicine, because these cells self-renew indefinitely in culture while retaining the capacity to differentiate into any...

Case Report
A case of Pfeiffer syndrome with c833_834GC>TG (Cys278Leu) mutation in the FGFR2 gene
Min Young Lee, Ga Won Jeon, Ji Mi Jung, Jong Beom Sin
Clin Exp Pediatr. 2010;53(7):774-777.   Published online July 31, 2010

Pfeiffer syndrome is a rare autosomal dominant disorder characterized by coronal craniosynostosis, brachycephaly, mid-facial hypoplasia, and broad and deviated thumbs and great toes. Pfeiffer syndrome occurs in approximately 1:100,000 live births. Clinical manifestations and molecular genetic testing are important to confirm the diagnosis. Mutations of the fibroblast growth factor receptor 1 (FGFR1) gene or FGFR2 gene can cause Pfeiffer syndrome....

Secondary renal amyloidosis in a 13-year-old girl with bronchiectasis
Eun Ae Yang, Dong Won Lee, Myung Chul Hyun, Min Hyun Cho
Clin Exp Pediatr. 2010;53(7):770-773.   Published online July 31, 2010

A 13-year-old girl was diagnosed with non-cystic fibrosis (CF)-related multifocal bronchiectasis accompanied by nephrotic-range proteinuria of unknown cause. On renal biopsy, there were many segmental homogeneous deposits of amyloid tissue with positive Congo red staining in the glomeruli and interstitium. On electron microscopy, relatively straight, non-branching, randomly arranged amyloid fibrils were showed in the mesangium of the glomeruli. These fibrils...

A case of regression of atypical dense deposit disease without C3 deposition in a child
Min Sun Kim, Pyoung Han Hwang, Mung Jae Kang, Dae-Yeol Lee
Clin Exp Pediatr. 2010;53(7):766-769.   Published online July 31, 2010

Dense deposit disease (DDD) is a rare disorder characterized by the deposition of abnormal electron-dense material within the glomerular basement membrane of the kidneys. The diagnosis is made in most patients between 5 and 15 years of age, and within 10 years, approximately half of the affected patients progress to end-stage renal disease. We report a rare case of regressive...

Review Article
Genetics of kidney development: pathogenesis of renal anomalies
Hyewon Hahn
Clin Exp Pediatr. 2010;53(7):729-734.   Published online July 31, 2010

Congenital anomalies of the kidney and urinary tract (CAKUT) account for more than 50% of abdominal masses found in neonates and involve about 0.5% of all pregnancies. CAKUT has a major role in renal failure, and increasing evidence suggests that certain abnormalities predispose to the development of hypertension and cardiovascular disease in adulthood. To understand the pathogenesis of human renal...

Original Article
An 18-year experience of tracheoesophageal fistula and esophageal atresia
Juhee Seo, Do Yeon Kim, Ai Rhan Kim, Dae Yeon Kim, Seong Chul Kim, In Koo Kim, Ki Soo Kim, Chong Hyun Yoon, Soo Young Pi
Clin Exp Pediatr. 2010;53(6):705-710.   Published online June 23, 2010
Purpose

To determine the clinical manifestations and outcomes of patients with tracheoesophageal fistula (TEF) and esophageal atresia (EA) born at a single neonatal intensive care unit.

Methods

A retrospective analysis was conducted for 97 patients with confirmed TEF and EA who were admitted to the neonatal intensive care unit between 1990 and 2007.

Results

The rate of prenatal diagnosis was 12%. The average gestational age...

Review Article
Practical stepwise approach to rhythm disturbances in congenital heart diseases
June Huh
Clin Exp Pediatr. 2010;53(6):680-687.   Published online June 23, 2010

Patients with congenital heart diseases (CHD) are confronted with early- and late-onset complications, such as conduction disorders, arrhythmias, myocardial dysfunction, altered coronary flow, and ischemia, throughout their lifetime despite successful hemodynamic and/or anatomical correction. Rhythm disturbance is a well-known and increasingly frequent cause of morbidity and mortality in patients with CHD. Predisposing factors to rhythm disturbances include underlying cardiac defects,...

Clinical presentations of critical cardiac defects in the newborn: Decision making and initial management
Jae Young Lee
Clin Exp Pediatr. 2010;53(6):669-679.   Published online June 23, 2010

The risk of mortality and morbidity of patients with congenital heart defects (CHDs) is highest during neonatal period and increases when diagnosis and proper management are delayed. Neonates with critical CHDs may present with severe cyanosis, respiratory distress, shock, or collapse, all of which are also frequent clinical presentations of various respiratory problems or sepsis in the newborn. Early diagnosis...

Original Article
Electrocardiography as an early cardiac screening test in children with mitochondrial disease
Ran Baik, Jung Hyun Chae, Young Mock Lee, Hoon Chul Kang, Joon Soo Lee, Heung Dong Kim
Clin Exp Pediatr. 2010;53(5):644-647.   Published online May 31, 2010
Purpose

To evaluate myocardial conductivity to understand cardiac involvement in patients with mitochondrial disease.

Methods

We performed retrospective study on fifty-seven nonspecific mitochondrial encephalopathy patients with no clinical cardiac manifestations. The patients were diagnosed with mitochondrial respiratory chain complex defects through biochemical enzyme assays of muscle tissue. We performed standard 12-lead electrocardiography (ECG) on all patients.

Results

ECG abnormalities were observed in 30 patients (52.6%)....

The natural history and prognostic factors of Graves' disease in Korean children and adolescents
Seung Min Song, Ji-Seok Youn, Jung Min Ko, Chong Kun Cheon, Jin-Ho Choi, Han Wook Yoo
Clin Exp Pediatr. 2010;53(4):585-591.   Published online April 15, 2010
Purpose : Graves' disease is the most common cause of hyperthyroidism in children and adolescents. In this study, we investigated the natural course and the prognostic factors of Graves' disease in Korean children and adolescents. Methods : One-hundred thirteen (88 girls and 25 boys) patients were included in this study. A retrospective analysis was made of all patients who were diagnosed...
Efficacy of levetiracetam in refractory childhood epilepsy
Keon Su Lee, Joon Won Kang
Clin Exp Pediatr. 2010;53(4):571-578.   Published online April 15, 2010
Purpose : To evaluate the efficacy and safety of levetiracetam adjunctive therapy for reducing the rate of seizure frequency in children with intractable pediatric epilepsy. Methods : We reviewed the medical records of 86 patients with intractable pediatric epilepsy who visited our hospital between March 1989 and February 2009. Levetiracetam was included in the previous anticonvulsant regimen for at least 6...
Change of interictal epileptiform discharges after antiepiletic drug treatment in childhood epilepsy
Mun Ju Kim, Sang Ook Nam
Clin Exp Pediatr. 2010;53(4):560-564.   Published online April 15, 2010
Purpose : Electroencephalography (EEG) findings can play a critical role in a variety of decisions, including initiation and withdrawal of antiepileptic drugs (AEDs) therapy. Interictal epileptiform discharges (IEDs) are predictor of recurrent seizures. We investigated IEDs in EEG after AED therapy and related factors in epileptic children. Methods : The subjects were 257 children [151 males and 106 females; age,...
Apoptosis and upregulation of TNF-α and TRAIL receptor 1 (DR4) in the pathogenesis of food protein-induced enterocolitis syndrome
Jin-Bok Hwang, Sang Pyo Kim, Yu Na Kang, Seong-Ryong Lee, Seong-Il Suh, Taeg Kyu Kwon
Clin Exp Pediatr. 2010;53(4):525-531.   Published online April 15, 2010
Purpose : Expression levels of tumor necrosis factor (TNF)-α expression on the mucosa of the small intestine is increased in patients with villous atrophy in food protein-induced enterocolitis syndrome (FPIES). TNF-α has been reported to induce apoptotic cell death in the epithelial cells. We studied the TNF family and TNF-receptor family apoptosis on the duodenal mucosa to investigate their roles in the pathogenesis...
The risk factors and prognosis associated with neonatal pulmonary hemorrhage
Su Jin Park, Ki Tae Yun, Won Duck Kim, Sang Geel Lee
Clin Exp Pediatr. 2010;53(4):503-509.   Published online April 15, 2010
Purpose : Although neonatal pulmonary hemorrhage is rare, it is associated with high mortality. We aimed to evaluate the risk factors associated with pulmonary hemorrhage in preterm infants and to describe the clinical course, including neonatal morbidity, of infants who developed pulmonary hemorrhage. Methods : We performed a retrospective case-control study of 117 newborn infants aged less than 37 gestational weeks admitted...
Analysis of neonatal sepsis in one neonatal intensive care unit for 6 years
Peter Chun, Seom Gim Kong, Shin Yun Byun, Su Eun Park, Hyung Du Lee
Clin Exp Pediatr. 2010;53(4):495-502.   Published online April 15, 2010
Purpose : Sepsis is a significant cause of morbidity and mortality in the newborn, particularly in preterm. The objective of this study was to analyze the incidence rate, causative pathogens and clinical features of neonatal sepsis in one neonatal intensive care unit (NICU) for 6 years. Methods : This study was retrospectively performed to review the clinical and laboratory characteristics including sex, gestational age,...
Review Article
Late physical effects of childhood cancer survivors
Young-Ho Lee
Clin Exp Pediatr. 2010;53(4):477-480.   Published online April 15, 2010
Advances in research and medical and supportive care have contributed to a growing population of adults formerly treated for childhood cancer. History of cancer and its therapy can have significant life-long health implications. Late effects of cancer therapy can be insidious on onset, occur outside the pediatric age, and contribute to premature morbidity and mortality. In this review, I have focused on the...
Psychosocial aspects of childhood cancer survivors
Jong Jin Seo
Clin Exp Pediatr. 2010;53(4):471-476.   Published online April 15, 2010
The majority of childhood cancer survivors and their families will be psychologically healthy, but may desire and benefit from preventive care. A significant portion of the survivor population will be psychosocially distressed in various aspects by their harsh experience of long cancer treatment, and may warrant professional intervention and treatment. Pediatricians should be aware of the late psychological effects that can occur a...
Case Report
Transient neonatal diabetes mellitus with macroglossia diagnosed by methylation specific PCR (MS-PCR)
Hye Young Jin, Jin-Ho Choi, Gu-Hwan Kim, Han-Wook Yoo
Clin Exp Pediatr. 2010;53(3):432-436.   Published online March 15, 2010
Transient neonatal diabetes mellitus (TNDM) has been associated with paternal uniparental isodisomy of chromosome 6, paternally inherited duplication of 6q24, or a methylation defect at a CpG island of the ZAC or HYMAI gene. We experienced a case of TNDM in which the patient presented with hyperglycemia, macroglossia, and intrauterine growth retardation, caused by a paternally derived HYMAI. An 18-day-old...
Original Article
Endocrine dysfunction after bone marrow transplantation during childhood and adolescence
Hye Young Jin, Jin-Ho Choi, Ho-Joon Im, Jong-Jin Seo, Hyung-Nam Moon, Han-Wook Yoo
Clin Exp Pediatr. 2010;53(3):420-427.   Published online March 15, 2010
Purpose : Several complications can occur in patients who received bone marrow transplantation (BMT) during childhood and adolescence. This study aims to investigate endocrine dysfunctions after BMT so that better care can be provided to care for long-term survivors of BMT. Methods : One hundred patients (61 males, 39 females) were included in this study. Clinical parameters such as initial diagnosis,...
Direct detection of hemophilia B F9 gene mutation using multiplex PCR and conformation sensitive gel electrophoresis
Ki Young Yoo, Hee Jin Kim, Kwang Chul Lee
Clin Exp Pediatr. 2010;53(3):397-407.   Published online March 15, 2010
Purpose : The F9 gene is known to be the causative gene for hemophilia B, but unfortunately the detection rate for restriction fragment length polymorphism-based linkage analysis is only 55.6%. Direct DNA sequencing can detect 98% of mutations, but this alternative procedure is very costly. Here, we conducted multiplex polymerase chain reactions (PCRs) and conformation sensitive gel electrophoresis (CSGE) to...
Respiratory syncytial virus infection cases in congenital heart disease patients
Woo Sup Shim, Jae Yeong Lee, Jin Yong Song, Soo Jin Kim, Sung Hye Kim, So Ick Jang, Eun Yong Choi
Clin Exp Pediatr. 2010;53(3):380-391.   Published online March 15, 2010
Purpose : Respiratory syncytial virus (RSV) is one of the main pathogens causing lower respiratory infections (LRI) in young children, usually of limited severity. However, in congenital heart disease (CHD) patients, one of the high-risk groups for RSV infection, RSV can cause serious illnesses and fatal results. To elucidate the effects of RSV infection in CHD patients, we observed RSV...