Risk Factors and Comorbidities Associated With the Allergic Rhinitis Phenotype in Children According to the ARIA Classification

PURPOSE: Data are lacking on the association between the allergic rhinitis (AR) phenotype and sensitization to specific allergens or bronchial hyperresponsiveness (BHR) in children. We here investigated risk factors and comorbidities, including sensitization to specific allergens and BHR, for the AR phenotype by AR and its Impact on Asthma (ARIA) classification in a general population-based birth cohort study. METHODS: We enrolled 606 children aged 7 years from the Panel Study of Korean Children. The AR phenotype was assigned in accordance with the ARIA classification in children. Skin prick tests and Provocholine provocation test were performed. Risk factors and comorbidities for AR phenotypes were then analyzed. RESULTS: The prevalence of mild and moderate to severe AR in our study cohort was 37.2% and 8.8%, respectively. Recent use of analgesics or antipyretics and current cat ownership were associated with the risk of mild persistent AR. Sensitizations to Dermatophagoides Pteronyssinus (Der p), Japanese hop and cat were associated with moderate to severe persistent AR. Children with moderate to severe AR had a higher risk of current asthma and BHR compared to mild AR cases (adjusted odds ratio [aOR], 5.26; 95% confidence interval [CI], 1.77–15.62). Moderate to severe AR with allergic sensitization was associated with the highest risk of BHR (aOR, 11.77; 95% CI, 3.40–40.74). CONCLUSIONS: Moderate to severe-persistent AR is more closely related to respiratory comorbidities and sensitizations than mild AR. Stratifying the AR phenotype by ARIA classification may assist in disease management.

Indoor pet ownership in infancy is a risk factor for the development of sensitization to pets and asthma in childhood

PURPOSE: It is controversial whether indoor pet exposure is either a risk or protective factor developing sensitization to pet allergens or asthma. Therefore, we investigated whether indoor pet ownership entails a risk for the development of asthma and sensitization in childhood. METHODS: The Panel Study of Korean Children (PSKC) is a general-population-based birth cohort study that recruited 2,078 mother-baby dyads in Korea between April and July of 2008. Among 1,577 children who were followed up in 2015, 559 underwent skin prick tests, spirometry and bronchial provocation tests using Provocholine. Having a cat or a dog and the prevalence of asthma were evaluated by using self-reported questionnaires and physicians’ medical records. RESULTS: During infancy, the rate of dog ownership was 4.5% (71 of 1,574) and that of cat ownership was 0.5% (8 of 1,574). Of the subjects, 7.9% (n=109) currently had at least 1 dog and 2.5% (n=34) had at least 1 cat. Pet ownership during infancy was associated with sensitization to cats or dogs (adjusted odds ratio [aOR], 4.24; 95% confidence interval [CI], 1.29–13.98), wheezing within 12 months (aOR, 5.56; 95% CI, 1.65–18.75) and current asthma (wheezing episode in the last 12 months+diagnosed asthma by physicians) (aOR, 6.36; 95% CI, 1.54–26.28). In contrast, pet ownership during the last 12 months was not associated with sensitization to cats or dogs or current asthma. CONCLUSION: Indoor pet exposure during infancy can be critical for developing sensitization to cats or dogs and asthma in childhood. Avoidance of pet exposure in early life may reduce sensitization to cats or dogs and development of asthma.

Prevalence, Risk Factors and Cutoff Values for Bronchial Hyperresponsiveness to Provocholine in 7-Year-Old Children

BACKGROUND: A US Food and Drug Administration (FDA)-approved drug methacholine chloride (Provocholine®) was recently introduced to Korea where it is now widely used in clinical practice. We aimed to evaluate the prevalence, risk factors and cutoff value of bronchial hyperresponsiveness (BHR) to Provocholine in 7-year-old children. METHODS: Six hundred and thirty-three children from the Panel Study on Korean Children who visited 16 regional hospitals were evaluated. Skin prick tests, spirometry and bronchial provocation tests for Provocholine as well as a detailed history and physical examinations were performed. The bronchial provocation test was reliably performed on 559 of these children. RESULTS: The prevalence of ever-diagnosed asthma via medical records was 7.7%, and that of current asthma (wheezy episode in the last 12 months + diagnosed asthma by physicians) was 3.2%. The prevalence of BHR to Provocholine was 17.2% and 25.8%, respectively, for a PC20 < 8 and < 16 mg/mL. The risk factors for BHR (PC20 < 16 mg/mL) were atopic dermatitis diagnosis and current dog ownership, whereas those for current asthma were allergy rhinitis diagnosis, a history of bronchiolitis before the age of 3, recent use of analgesics/antipyretics and maternal history of asthma. The BHR prevalence trend showed an increase along with the increased immunoglobulin E (IgE) quartile. The cutoff value of PC20 for the diagnosis of current asthma in children at age 7 was 5.8 mg/mL (sensitivity: 47.1%, specificity: 87.4%). CONCLUSIONS: BHR to Provocholine (PC20 < 8 mg/mL) was observed in 17.2% of 7-year-olds children from the general population and the cutoff value of PC20 for the diagnosis of current asthma was 5.8 mg/mL in this age group. The risk factors for BHR and current asthma showed discrepancies suggesting different underlying mechanisms. Bronchial provocation testing with Provocholine will be a useful clinical tool in the future.

High Maternal Blood Mercury Level Is Associated with Low Verbal IQ in Children

The objective of the present study was to investigate the relationship of IQ in children with maternal blood mercury concentration during late pregnancy. The present study is a component of the Mothers and Children's Environmental Health (MOCEH) study, a multi-center birth cohort project in Korea that began in 2006. The study cohort consisted of 553 children whose mothers underwent testing for blood mercury during late pregnancy. The children were given the Korean language version of the Wechsler Preschool and Primary Scale of Intelligence, revised edition (WPPSI-R) at 60 months of age. Multivariate linear regression analysis, with adjustment for covariates, was used to assess the relationship between verbal, performance, and total IQ in children and blood mercury concentration of mothers during late pregnancy. The results of multivariate linear regression analysis indicated that a doubling of blood mercury was associated with the decrease in verbal and total IQ by 2.482 (95% confidence interval [CI], 0.749–4.214) and 2.402 (95% CI, 0.526–4.279), respectively, after adjustment. This inverse association remained after further adjustment for blood lead concentration. Fish intake is an effect modifier of child IQ. In conclusion, high maternal blood mercury level is associated with low verbal IQ in children.

Maternal Stress and Depressive Symptoms and Infant Development at Six Months: the Mothers and Children's Environmental Health (MOCEH) Prospective Study

Our objective is to evaluate the relationships between prenatal maternal stress and depressive symptoms, respectively, and infant neurodevelopment at 6 months, adjusted for heavy metals and oxidative stress. This research is a part of a multi-center birth cohort study in South Korea. Information on stress and depressive symptoms was collected during the first trimester using Psychosocial Well-Being Index Short Form (PWI-SF) and Center for Epidemiological Studies Depression Scale (CES-D). The Korean Bayley Scales of Infant Development-II assessment (BSID-II), which includes the standardized mental development index (MDI) and psychomotor developmental index (PDI), and Korean Ages & Stages Questionnaires (K-ASQ) were applied to infants at six months of age. A higher index score indicates better development. Among 641 babies, 320 were female (50%). Maternal PWI ≥ 29 (vs. PWI ≤ 18) during early pregnancy was associated with a decrease in MDI scores of 5.37 points (P = 0.02) after adjusting for socioeconomic factors. Maternal CES-D ≥ 26 (vs. CES-D ≤ 10) during early pregnancy was associated with a decrease in MDI scores of 8.18 points (P = 0.01). The associations remained significant even after adjustment for lead, cadmium, and MDA levels (P < 0.05). However, no association was found between maternal PWI/CES-D and PDI score. No interaction was observed between stress and lead exposure. We found an inverse association between prenatal maternal stress and depressive symptoms, and MDI scores in 6-month-old infants after adjustment for prenatal lead exposure, which is known to affect cognitive function negatively.

Effect of Breastfeeding Duration on Cognitive Development in Infants: 3-Year Follow-up Study

We investigated the association between breastfeeding and cognitive development in infants during their first 3 years. The present study was a part of the Mothers' and Children's Environmental Health (MOCEH) study, which was a multi-center birth cohort project in Korea that began in 2006. A total of 697 infants were tested at age 12, 24, and 36 months using the Korean version of the Bayley Scales of Infant Development II (K-BSID-II). The use and duration of breastfeeding and formula feeding were measured. The relationship between breastfeeding and the mental development index (MDI) score was analyzed by multiple linear regression analysis. The results indicated a positive correlation between breastfeeding duration and MDI score. After adjusting for covariates, infants who were breastfed for ≥ 9 months had significantly better cognitive development than those who had not been breastfed. These results suggest that the longer duration of breastfeeding improves cognitive development in infants.

Behavioral characteristics and parental stress in elementary school children with bronchial asthma and allergic rhinitis

PURPOSE: The aim of this study was to investigate the differences in behavioral characteristics and parental stress between allergic and nonallergic elementary school children. METHODS: Ninety-one elementary school children who had allergic disease were enrolled (asthma, n=27; allergic rhinitis, n=35; combined, n=29). Also one hundred six nonallergic elementary school children were enrolled for the control group. The Korean Child Behavior Check List (K-CBCL) and Korean Parenting Stress Index-Short Form (K-PSI-SF) were completed by their mothers. RESULTS: According to the analysis of K-CBCL, the score for Internalizing, anxious/depressed and somatic complaints were significantly higher in the combined group than in the control group. The score for Diagnostic and Statistical Manual of Mental Disorders (DSM)-affective problems in the combined group and DSM-somatic problems were significantly higher in the asthma group than in the control group. According to the analysis of K-PSI-SF, the score for parental distress was significantly higher in the allergic rhinitis group than in the control group. The scores for behavioral problems and parental stress were significantly correlated to allergic disease groups. CONCLUSION: Behavioral problems and parental stress were significantly associated with asthma and allergic rhinitis. The results of this study suggest the importance of psychosocial support for mothers and children with allergic diseases.

Association between Prenatal Exposure to Cadmium and Atopic Dermatitis in Infancy

Our objective was to evaluate the relationship between intrauterine exposure to cadmium and the presence of atopic dermatitis in infants 6 months of age, adjusted for covariates including exposure to other heavy metals. The present research is a component of the Mothers' and Children's Environmental Health (MOCEH) study, a multi-center birth cohort project conducted in Korea. Study subjects were restricted to pregnant women in whom cadmium and lead levels were measured at delivery and whose infants were assessed for the presence of atopic disease at 6 months of age. The odds ratio (OR) for the presence of atopic dermatitis in 6-month-old infants whose cord blood had elevated cadmium levels, after adjustment for other covariates, was 2.350 (95% CI, 1.126-4.906). The OR for the presence of atopic dermatitis in infants whose cord blood had elevated lead levels was not significant. In the present study, the cord blood cadmium level was significantly associated with the presence of atopic dermatitis in 6-month-old infants; this was not true of the cord blood lead level. To the best of our knowledge, this is the first prospective study to show a relationship between prenatal exposure to cadmium and atopic dermatitis in infancy.

A Case of Atrial Flutter after Umbilical Venous Catheterization / 대한주산의학회잡지

Umbilical catheterization is one of the common procedures performed in the neonatal intensive care unit, but it is sometimes associated with significant complications. Atrial flutter (AF) is a rare cardiac complication following the insertion of an umbilical venous catheter. We report a newborn infant who developed AF after umbilical venous catheterization. The tachyarrhythmia was successfully managed with synchronized cardioversion. There were no recurrent episodes of AF and antiarrhythmic medications were not needed on the follow-up.

A Case of Atrial Flutter after Umbilical Venous Catheterization / 대한주산의학회잡지

Umbilical catheterization is one of the common procedures performed in the neonatal intensive care unit, but it is sometimes associated with significant complications. Atrial flutter (AF) is a rare cardiac complication following the insertion of an umbilical venous catheter. We report a newborn infant who developed AF after umbilical venous catheterization. The tachyarrhythmia was successfully managed with synchronized cardioversion. There were no recurrent episodes of AF and antiarrhythmic medications were not needed on the follow-up.

A Case of Enterovirus 71 Infection Presented with Acute Flaccid Paralysis / 대한소아신경학회지

Hand-foot-mouth disease (HFMD) is characterized by distinctive skin lesions on the hand, foot, and mouth and in general, recovery occurs within one week. However, in cases of HFMD by enterovirus 71 (EV71) infection, the development of neurologic complications such as brainstem encephalitis, acute flaccid paralysis, and aseptic meningitis has been common. Moreover, it has been reported that some patients with neuologic complications have expired in severe cases. Here, we report a case of EV71 infection presented with acute flaccid paralysis of a single similar to paralytic poliomyelitis.

A Case of Silver-Russell Syndrome Diagnosed in the Patient Admitted with Hypoglycemic Seizure / 대한소아신경학회지

The Silver-Russell syndrome(SRS) is a clinically heterogeneous syndrome characterized by intrauterine and postnatal growth retardation with spared cranial growth, characteristic facial features, and body asymmetry. Although mild to moderate hypoglycemic symptoms occasionally appear in children with SRS especially those who are not fed frequently and regularly, hypoglycemic seizures rarely occur. We report a rare case of SRS which was diagnosed in a 4-year-old female who admitted with hypoglycemic seizure. The patient showed the characteristic features of SRS. Endocrinologic studies were normal except for partial growth hormone insufficiency. To prevent seizures and chronic neurologic deficits in children with SRS, the early recognition and appropriate management of hypoglycemia is critical.

A Case of Hemophilia A Diagnosed in a Premature Infant

Although the majority of abnormal bleeding during the neonatal period results from acquired coagulation disorders, inherited coagulation disorders can also manifest at this time. Hemophilia is the most common of inherited coagulation disorder. Although 40-70% of cases with hemophilia are diagnosed in the neonatal period, few cases have been reported in premature infants. We report a case of a premature infant born at 31 weeks of gestation, diagnosed with hemophilia A by blood coagulation test, coagulation factor assay and study of the F8 gene. The baby was treated with recombinant factor VIII (Recombinate(R), USA) because of repeated seizures and intramuscular hematoma.

A Case of Amniotic Band Syndrome Associated with Aplasia Cutis of the Scalp

The amniotic band syndrome is an uncommon congenital fetal abnormality, presumably due to fetal entanglement in strands of ruptured amniotic sac. The defects caused by this syndrome vary from simple limb defects to major visceral and craniofacial defects. We cared for a newborn infant with this syndrome, who showed constriction rings of the right leg and right axilla, right club foot, thoracic scoliosis, polydactyly, absence of the right thumb and aplasia cutis of the scalp. We report this case with a brief review of the literature.

The Effect of Rush Immunotherapy with House Dust Mite in the Production of IL-5 and IFN-gamma from the Peripheral Blood T Cells of Asthmatic Children

Although the mechanisms are unclear, rush immunotherapy (RIT) may be effective to treat allergic diseases. We investigated the long-term modifications of cellular immunity as a mechanism of RIT. The RIT group, included 15 house dust mite (HDM)-sensitized asthmatic children, received RIT only with Dermatophagoides farinae (Der f) and Dermatophagoides pteronyssinus (Der p), whereas the control group, consisted of 10 HDM-sensitized asthmatic children, did not receive RIT. The asthma symptom scores and the skin reactivities to Der f were measured. The cellular proliferative responses and intracellular interleukin (IL)-5 and interferon (IFN)-gamma productions from peripheral blood T cells were also measured before, 8 weeks and 1 yr after RIT. The symptom scores, skin reactivity to Der f and cellular proliferative responses to Der f were decreased significantly after 8 weeks and maintained until 1 yr of RIT. The IFN-gamma/IL-5 ratio of the CD3(+) and CD4(+) cells were increased significantly after 8 weeks and maintained until 1 yr of RIT, while there were no changes in the control group. These data indicate that the continuous functional modification from Th2 to Th1 phenotype of the CD4(+) T cells are developed after RIT in the asthmatic children sensitized with HDM.

A Case of Thyroid Hemiagenesis

Thyroid hemiagenesis is a rare congenital anomaly in which one thyroid lobe fails to develop. Thyroid hemiagenesis usually does not cause clinical symptoms by itself, therefore, this anomaly is detected incidentally during the evaluation of other thyroid disorders. We describe a rare case of thyroid hemiagenesis in a 1-month-old female infant who presented with prolonged jaundice and abnormal laboratory findings of congenital hypothyroidism. The patient showed the characteristic features of thyroid hemiagenesis of the left lobe in Tc-99m pertechnetate scintigraphy and ultrasonography of the thyroid gland. The patient has improved with supportive care, including thyroid hormone replacement. Further long-term follow-up is required for the investigation of recurrence of thyroid abnormalities.

A Case of Ruptured Ovarian Cyst in a Newborn

Ovarian cysts are the most common cystic abdominal masses in female newborns. It is believed to be derived from an overstimulation of the ovarian follicles by maternal, placental, and fetal hormones. Although most ovarian cysts resolve spontaneously, surgical management is mandatory for life-threatening, complicated cases, including torsion, intracystic hemorrhage, and rupture of the cyst. Rupture of ovarian cysts is thought to be exceedingly rare, but can lead to severe hemorrhagic ascites or peritonitis. We managed a case of a ruptured ovarian cyst in a female newborn who presented with mild abdominal distension and two episodes of gross hematuria. Exploratory laparotomy revealed a right ovarian cyst with torsion and rupture. She was successfully treated with a right salpingo-oophorectomy with no sequelae.

Acute Pancreatitis Associated with Varicella Infectionin an Immunocompetent Child / 대한소아소화기영양학회지

Blunt trauma, drugs, infection, congenital anomalies of the pancreaticobiliary system, and multisystem diseases are the main causes of acute pancreatitis in children. Various viruses can cause acute pancreatitis, but varicella-induced pancreatitis is unusual and generally observed in adults or immunocompromised patients. We report a rare case of acute pancreatitis associated with varicella-zoster virus infection in a 6-year-old immunocompetent girl. The patient initially presented complaining of severe abdominal pain and repetitive vomiting. The patient had multiple cutaneous crusts that has been caused by preceding varicella infection and had elevated values of serum amylase and lipase. Abdominal ultrasonography demonstrated swelling of the pancreas and pancreatic duct dilatation, findings which were compatible with acute pancreatitis. The patient's clinical and laboratory abnormalities were completely normalized through conservative treatment consisting of fasting, total parenteral nutrition, and analgesic therapy.

A Case of Telangiectatic Focal Nodular Hyperplasia of the Liver in a Newborn

Telangiectatic focal nodular hyperplasia (FNH) denotes atypical lesions considered as variants of FNH. FNH of the liver is characterized by stellate central scars with dysplastic vessels and hyperplastic nodules. It is the second most common benign hepatic tumor following hemangioma. However, telangiectatic FNH is extremely rare in the perinatal period and only three cases were reported in the literature. We recently experienced a case of telangiectatic FNH in a newborn. This lesion was detected on the prenatal ultrasonographic examination performed at the 36th weeks of gestation, and confirmed by the right lobectomy after birth. We report this case with a brief review of the literature.

A Case of Kawasaki Disease Resembling as Peritonsillar Abscess

Kawasaki disease is an acute febrile mucocutanenous syndrome associated with multisystemic vasculitis. The etiology of Kawasaki disease is still unknown therefore this disease can be diagnosed only based upon clinician's recognition of a symptom pattern which includes high fever, oral cavity changes, polymorphous skin rash, conjuctival injections, cervical lymphadenopathy, and swelling of peripheral extremities. Early diagnosis and treatment of Kawasaki disease is critical to reduce the risk of cardiac complications such as coronary aneurysm. However there is no specific diagnostic tools for Kawasaki disease, unusual clinical manifestation resembling infectious disease involving cervical lesion often leads to delay in appropriate diagnosis and treatment of Kawasaki disease. We report a ten-year-old girl with Kawasaki disease whose initial presentation mimicking peritonsillar abscess.