PURPOSE: Internal tibial torsion is prevalent in East Asian countries such as Korea and Japan, where sitting on the floor is common behavior. Internal tibial torsion or excessive lateral tibial torsion may cause esthetical, functional, or psychological problems and also may induce degenerative arthritis in older age. The purpose of this study is to measure the tibial torsion in children of the Jeju area. METHODS: Tibial torsion was measured in 1,042 lower extremities of 521 children from one to 12 years of age. The values of transmalleolar angles were analyzed for each age group divided by 6 months. Quadratic and linear regression models were used to fit patterns of changes in mean values of transmalleolar angles. The age at seven, which provides the highest coefficient of determination for quadratic regression analysis, was used as a cut-off point to fit different statistical models. RESULTS: The mean transmalleolar angle was 0.10+/-5.79degrees in all children, 0.90+/-5.49degrees in males, and -0.80+/-5.97degrees in females. The value was 4.25+/-4.04 in 1 year of age, gradually decreased to the lowest level of -1.98degrees in four years and seven months of age, increased again with age until it reached 0.67+/-1.10degrees at seven years of age, and stayed at that level thereafter. CONCLUSION: Internal tibial torsion in infancy is known to correct spontaneously in the normal developing process. But in this study, the mean transmalleolar angle in children of Jeju area annually decreased after one year of age; to the lowest angle at four years and seven months of age; increased again gradually to the age of seven; and persisted in that level, about 10degrees less than western children, not correcting further thereafter. These findings suggest tibial torsion might be caused by lifestyle, especially sitting on feet. To prevent abnormalities of joints and gaits, early diagnosis of tibial torsion in childhood and posture correction or early treatment when needed, seems to be necessary.
Asian Continental Ancestry Group ; Child* ; Early Diagnosis ; Female ; Foot ; Gait ; Humans ; Japan ; Joints ; Korea ; Life Style ; Linear Models ; Lower Extremity ; Male ; Models, Statistical ; Osteoarthritis ; Posture ; Tibia

PURPOSES: A cross-sectional study on serum lipids in school children and adolescents was carried out in two different areas in 2002. We studied to determine of the difference in lipids level of children between urban and rural areas and changes of cholesterol levels compared to those of early- 1990 studies. METHODS: A cross-sectional study on serum lipids in school children and adolescents was carried out in two different areas, Ansan and Paju. The number of children in Ansan was 835, that in Paju was 233. After fasting for 12 hours, serum total choleterol, high density lipoprotein(HDL) cholesterol, low density lipoprotein(LDL) cholsterol, triglyceride were measured. RESULTS: The mean of total serum cholesterol level was 176.48+/-27.70 mg/dL. The mean of HDL cholesterol was 61.42+/-12.38 mg/dL, LDL cholesterol was 94.14+/-24.45 mg/dL, and triglyceride was 93.09+/-45.96 mg/dL. The means of total serum total cholesterol and lipoproteins of children and adolescents were not different significantly in Ansan and Paju. The prevalences of children and adolescence with abnormal high cholesterol level(> or =200 mg/dL) and abnormal LDL cholesterol level(> or =130 mg/dL) were also not different in two areas. CONCLUSION: Our results suggest that there were no significant differences in serum lipid level and the prevalence of school children and adolescence with hyperlipidemia between urban and rural area and mean lipid levels of school children and adolescence were increased during the past decade.
Adolescent* ; Child* ; Cholesterol ; Cholesterol, HDL ; Cholesterol, LDL ; Cross-Sectional Studies ; Fasting ; Gyeonggi-do ; Humans ; Hyperlipidemias ; Lipoproteins ; Prevalence ; Triglycerides

PURPOSE: Pharmacologic provocation test of growth hormone(GH) is a non-physiologic method and has several limitations for diagnosing growth hormone(GH) deficiency. Spontaneous GH release studies could be important in understanding the pathophysiology of children with poor growth but normal responses to GH provocation tests. Also, the relationship between nocturnal GH secretions and sleep patterns in short stature children is poorly understood. The aim of this study is to determine whether there are differences in sleep patterns and nocturnal GH secretory profiles between idiopathic short stature children and a normal stature group. METHODS: Spontaneous nocturnal GH secretions and sleep patterns were evaluated in 12 prepubertal idiopathic short stature children with normal responses to provocation tests and 9 normal stature controls. Blood samples were taken every 30 minutes from 22:00-06:30 and sleep patterns were analyzed by polysomnography. RESULTS: The mean GH level during sleep was significantly lower in short stature children than in controls. The peak GH level after sleep, coincident with the first slow wave sleep, was lower in the short stature group. The slow wave sleep times of short stature children were decreased compared with those of normal subjects. CONCLUSION: These results suggest that overnight serial GH sampling is helpful to identify short stature children with subnormal GH secretions, and sleep structure differences may be associated with decreased overnight GH secretions in short stature children.
Child* ; Growth Hormone* ; Humans ; Polysomnography

PURPOSE: The purpose of this study is to clarify the effect of hemodynamic changes of ductal shunt on brain natriuretic peptide(BNP) secretion and to investigate the value of plasma BNP level as a predictor of spontaneous closure of ductus arteriosus(DA) in healthy preterm infants. METHODS: 24 preterm infants were enrolled. Echocardiographic examinations and blood samplings of BNP were carried out in 24 hours, 72 hours and on 5th days after birth. The magnitudes of ductal shunts were estimated using ductal color Doppler flow pattern, left atrial/aortic root ratio(LA/Ao ratio) and antegrade peak diastolic flow velocity(APDFV) in left pulmonary artery. RESULTS: DA in healthy preterm infants were closed spontaneously within 5 days of birth. Plasma BNP levels in infants with ductal shunt were higher than that of infants without shunt in 24 hours and then significantly decreased within 72 hours of birth according to the decreases of flow in ductal shunts. BNP levels of all infants with ductal shunt were significantly correlated with LA/Ao ratio and APDFV. CONCLUSION: Reduction of BNP levels may serve as an indicator of spontaneous closure of DA in healthy preterm infants. Its levels show significant correlations with the magnitudes of ductal shunt. Therefore BNP levels may be used in determining the necessity of and the optimal time to initiating medical and surgical management of preterm infants with significant PDA.
Brain* ; Ductus Arteriosus, Patent ; Echocardiography ; Hemodynamics ; Humans ; Infant ; Infant, Newborn ; Infant, Premature* ; Natriuretic Peptide, Brain* ; Parturition ; Plasma* ; Pulmonary Artery

We performed a retrospective epidemiologic survey on Kawasaki disease (KD) from 1997 to 1999 in Korea. We sent a questionnaire to 111 training hospitals, and summarized the data from 50 hospitals that responded. Data from a total of 3,862 cases were collected, which showed no difference in annual incidence and a seasonal predilection for summer. The male-to-female ratio was 1.51:1, and the mean age was 29.7 months. The prevalence of sibling cases was 0.26%, and the rate of recurrent cases was 2.3%. The proportion of patients with KD among total hospitalized pediatric patients was 1.19% in average, showing a significant difference according to the regions. Coronary arterial (CA) abnormalities were detected by echocardiography in 19.8% of cases (737/3,723) including dilatations in 601 cases (16.1%) and aneurysms in 191 cases (5.1%). Data from total 8,251 cases in the 1990s including the cases in the present study, in Korea showed a mean age of patients 28.9 months, male-to-female ratio 1.6:1, seasonal predilection for summer, prevalence of sibling cases 0.24%, rate of recurrent cases 2.3%, incidence of CA abnormalities 21.0%, and incidence of CA aneurysms 5.2%, with statistically significant decreasing trends in the male-to-female ratio and the rate of CA abnormalities.
Adolescent ; Age Distribution ; Child ; Child, Preschool ; Coronary Vessels/pathology ; Female ; Humans ; Infant ; Infant, Newborn ; Korea/epidemiology ; Male ; Mucocutaneous Lymph Node Syndrome/*epidemiology ; Questionnaires ; Retrospective Studies ; Seasons ; Sex Distribution

PURPOSE: Dexamethasone is a well-known treatment for preterm infants with bronchopulmonary dysplasia. However, serious side effects have been identified, including hypertension, and cardiac hypertrophy. This study was undertaken to examine whether dexamethasone induced cardiac hypertrophy in preterm infants with bronchopulmonary dysplasia. METHODS: We retrospectively reviewed 12 infants with bronchopulmonary dysplasia treated with dexamethasone at Korea University Hospital from August 1995 to February 1999. Serial two-dimensional and M-mode echocardiographic measurements were taken before treatment and at 1,2,3,4,5 weeks after the start of dexamethasone therapy. RESULTS: Patients receiving dexamethasone had a significantly increase in interventricular septal thickness and left ventricular posterior wall thickness. These effects were transient, reached their maximal degree by the third week of treatment, and approached pretreatment conditions by the fifth week of treatment. Heart rate was increased but statistically not significant. The fractional shortening, systolic and diastolic arterial pressure were transiently increased during dexamethasone therapy. CONCLUSION: We conclude that a transient myocardial hypertrophy is associated with dexamethasone therapy in infants with bronchopulmonary dysplasia. Follow up of careful echocardiac monitoring should be considered in infants with dexamethasone therapy.
Arterial Pressure ; Bronchopulmonary Dysplasia ; Cardiomegaly* ; Cardiomyopathy, Hypertrophic* ; Dexamethasone* ; Echocardiography ; Follow-Up Studies ; Heart Rate ; Humans ; Hypertension ; Hypertrophy* ; Infant ; Infant, Newborn ; Infant, Premature* ; Korea ; Retrospective Studies

Little is known about the prevalence of naturally acquired IgG antibodies to the capsular polysaccharides of Streptococcus pneumoniae (pneumococcal IgG) in Korea. In the present study, we investigated transplacental transfer and age-related levels of pneumococcal IgG to provide background seroepidemiologic data for S. pneumoniae in Korea. One hundred thirty eight sera were assayed by ELISA for IgG to pneumococcal polysaccharide capsular serotypes 14 and 19, the predominant serotypes for under 15 yr of age in Korea. The subjects were divided into 7 subgroups according to age. The cord/maternal geometric mean titer of pneumococcal were 4.47+/-5.88/5.21 +/- 5.88 for serotype 14, and 4.68 +/- 5.55/6.55 +/- 6.92 for serotype 1 9 (mean +/- standard deviation, microg/mL). After birth, the geometric mean titers of pneumococcal IgG for serotypes 14 and 19 expressed in microg/mL were 1.18+/-2.12 and 1.41+/-2.17 in the 0-6 months group, 0.27+/-0.19 and 0.69+/-0.93 in 7-12 months, 0.21+/-0.22 and 0.64+/-1.32 in 1-2 yr, 0.69+/-0.78 and 2.65+/-2.46 in 3-6 yr, 2.52+/-2.72 and 8.29+/-4.24 in 7-10 yr, respectively. In conclusion, reduced transplacental transfer and very low serum concentrations of pneumococcal IgG may contribute to the susceptibility of neonates, infants, and young children to S. pneumoniae infection.
Age Factors ; Antibodies, Bacterial/metabolism* ; Bacterial Capsules/immunology* ; Child ; Child, Preschool ; Enzyme-Linked Immunosorbent Assay ; Female ; Human ; IgG/metabolism* ; IgG/blood ; Infant ; Infant, Newborn ; Male ; Maternal-Fetal Exchange* ; Pneumococcal Vaccines/immunology ; Pregnancy ; Streptococcus pneumoniae/immunology* ; Vaccines, Conjugate/immunology

PURPOSE: The selectin family of adhesion molecules plays a role in the initiation of endothelium-leukocyte interaction of inflammation and ischemia-reperfusion. P-selectin, a rapidly expressed endothelial cell adhesion molecule, is essential for both neutrophil rolling after endothelial stimulation and neutrophil transmigration. P-selectins were expressed after brain injury and could play an important role in the pathogenesis of ischemic brain injury in adult animal. However, the mechanisms leading to post-hypoxic-ischemic injury in immature brain are unknown yet. We hypothesize that P-selectin might mediate post-hypoxic-ischemic injury in immature rat brain. We evaluated the expression of mRNA and protein of P-selectin in post-hypoxic-ischemic immature rat brain. METHODS: In isoflurane-anesthetized P7(Postnatal day 7) Sprague-Dawley rats(n=81), the right carotid artery was isolated and coagulated. 1-2 h later animals were exposed to 8% oxygen(balanced with nitrogen) for 2 h in glass chambers, in a warm air incubator (temperature maintained at 36.5 degrees C). Control included carotid artery coagulation alone, hypoxia alone, and normal(neither hypoxia nor coagulation). For RNA extraction, the rats were decapitated at 0, 2, 4, 8, 12, 24 and 48 h after hypoxic-ischemic injury. For Western blot analyses with P-selectin, rats were decapitated at 0, 15, 30 min, 1, 2, 4, 8, 12, 24 and 48 h after hypoxic-ischemic injury. Control or hypoxia alone rats were sacrificed 8 h after the respective intervention. RESULTS: There was no expression of P-selectin mRNA in control groups(carotid artery coagulation alone, hypoxia alone, or normal). P-selectin mRNA expression in the ipsilateral(right) hemisphere reached a peak at 8 h after hypoxia-ischemia and then barely detected after 24 h. Expression of P-selectin protein was not observed in brain tissue of control rats. P-selectin protein was detected as early as 15 min and 30 min at both hemisphere in experimental rats and decreased at 1 h. P-selectin protein increased in right hemisphere at 4 h post-hypoxia-ischemia, peaked at 8 h and no longer detectable at 24 h. CONCLUSION: Hypoxic-ischemic injury leads to P-selectin expression in neonatal rats brain. The temporal profiles of post-hypoxic-ischemic P-selectin mRNA and protein expression are consistent with a role in the evolution of subsequent brain injury.
Adult ; Animals ; Anoxia ; Arteries ; Blotting, Western ; Brain Injuries* ; Brain* ; Carotid Arteries ; Endothelial Cells ; Glass ; Humans ; Hypoxia-Ischemia, Brain ; Incubators ; Inflammation ; Neutrophils ; P-Selectin* ; Rats* ; Rats, Sprague-Dawley ; RNA ; RNA, Messenger*

PURPOSE: This study was undertaken to investigate changes in cardiac performance in early neo-natal life by observing the changes of left ventricular(LV) function and volume according to the size of ductus arteriosus. METHODS: The study group consisted of 21 full-term Cesarean section neonates who were admitted to the nursery of Korea University Hospital. We serially investigated the patency and size of the ductus at 2, 24, 120 hours after birth by two-dimensional echocardiography. The standard two-dimensional tracings of LV volume were obtained under the guidance of apical two- and four-chamber views. LV end-diastolic and end-systolic volumes were calculated using a biplanar Simpson's method. RESULTS: LV end-diastolic volume was highest(3.44>0.4mm) at 2 hours of age(P<0.01), being constant from 24 to 120 hours. LV contractility, indicated by the mean normalized systolic ejection rate, remained constant during the whole period of investigation. The size of the ductus arteriosus was maximal at 2 hours after birth, and decreased significantly at 24 hours of age (P<0.01). The size of ductus arteriosus demonstrated a close linear correlation with the left ventricular end-diastolic volume(y=0.17x+2.92, r=0.59: P<0.01). CONCLUSION: Changes in LV end-diastolic volume soon after birth depend on changes in ductus arteriosus flow, which in turn is affected by ductal diameter. Upon patency of the ductus arteriosus, the newborn left ventricle operates at maximal performance with only a limited capacity to increase contractility.
Cesarean Section ; Ductus Arteriosus ; Ductus Arteriosus, Patent ; Echocardiography ; Female ; Heart Ventricles ; Humans ; Infant, Newborn ; Korea ; Nurseries ; Parturition ; Pregnancy ; Ventricular Function, Left

Kabuki make-up syndrome(KMS) is characterized by mental and developmental retardation and peculiar facial features including long palpebral fissures with eversion of the lateral portion of lower eyelid and arching of eyebrows, resembling the actors in Japanese Kabuki. In addition, dermatoglyphic and skeletal abnormalities are commonly associated. Although most karyotypes of KMS are shown to be normal, there have been some reports suggesting the involvement of X chrornosome in KMS. We report here two children showing the main features of KMS, one of whom has a mosaic Turner karyotype of 45,X/46,Xi(Xq). We reviewed KMS and its association with abnormalities of X chromosome.
Asian Continental Ancestry Group ; Child ; Dermatoglyphics ; Eyebrows ; Eyelids ; Humans ; Isochromosomes* ; Karyotype ; Turner Syndrome ; X Chromosome