Question: What factors are associated with bronchial hyperresponsiveness (BHR) in adolescents with childhood asthma? Finding: Age, mold sensitization, and increased eosinophil count were associated with BHR in boys versus a reduced forced expiratory volume in 1 second/forced vital capacity ratio in girls. Early mold sensitization was a risk factor for persistent BHR in boys only. Meaning: Sex-specific differences were observed in the factors associated with BHR in adolescents. |
Sex cord tumors with annular tubules are known to originate from the sex cord of embryonic gonads that synthesize Sertoli cells, Leydig cells, granulosa cells, and theca cells of the ovarian stroma, while ovarian small cell carcinoma of the hypercalcemic type is a type of neuroendocrine tumor. Both these tumors are uncommon, potentially malignant neoplasms in children. We report the... |
The menarcheal age of Korean women has been rapidly decreasing for the last 50 years, and the average menarcheal age of women born in the 1990s is approaching 12.6 years. In addition, interest in early puberty has been increasing recently owing to the rapid increase in precocious puberty. Generally, out of concern for short stature and early menarche, idiopathic central... |
Precocious puberty is defined as breast development before the age of 8 years in girls. The present study aimed to reveal the diagnosis of Korean girls referred for precocious puberty and to compare the constitutional and endocrinological features among diagnosis groups. The present study used a retrospective chart review of 988 Korean girls who had visited a pediatric endocrinology clinic from... |
Phytoestrogen is an estrogenic compound that occurs naturally in plants. The most common sources of phytoestrogen are soybean products, which contain high levels of isoflavones. This compound, which has structural similarity with estrogen, can act as an estrogen receptor agonist or antagonist. Animal studies provide evidence of the significant effects of phytoestrogen on sexual development, including altered pubertal timing, impaired... |
A sclerosing stromal tumor of the ovary is an extremely rare benign tumor; it usually is found during the second and third decades of life. Patients present with pelvic pain or a palpable abdominal mass. Hormonal effects such as masculinization are uncommon. Here, an 11-year old premenarchal girl presented with deepening of the voice. In addition, clitoromegaly and hirsutism with... |
Child sexual abuse is not a rarely encountered problem. Child sexual abuse is a pediatric disease entity with lifelong impact. Child sexual abuse, different from sexual assault, is not always accompanied by violent force and usually repeated over a period of time. Child sexual abuse should be approached by multidisciplinary team experts. Every pediatrician should know the child protection network... |
Purpose : A universal standard of the birth weight for gestational age cannot be made since birth weight distribution varies with races, nations and eras. This report aims to establish the birth weight for gestational age patterns by sex, plurality, and parity, specific for Korean live births. Methods : The national birth certificate data of all live births in Korea from... |
Purpose : Child sexual abuse is a significant and serious problem that affects public health and society. Pediatricians are responsible for preventing and detecting sexual abuse of children. The aim of this study was to examine clinical findings of child sexual abuse. Methods : The authors retrospectively studied 292 patients between the ages of 0 and 18 who were referred for... |
Purpose : This study was conducted to survey the preliminary data on risk behaviors and to identify the factors that prevent risk-behaviors in late adolescence. Methods : Freshmen(n=1,297) beginning the first semester in Korea University, Seoul, Korea completed self-administered risk behavior questionnaires, comprising 5 domains : demographics, smoking, drinking, drug abuse and sexual behavior. Results : The rate of smoking experience was... |
Purpose : This study was performed to evaluate the recent frequency of karyotypes in different sex chromosome abnormalities and to evaluate the age and clinical manifestations at diagnosis. Methods : Peripheral blood leukocytes were obtained from subjects who were clinically suspected to have sex chromosome abnormalities and referred to the cytogenetic laboratory in the Department of Pediatrics, Kyungpook National University Hospital... |
Purpose : Urinary tract infection(UTI) is the most common bacterial infectious disease that may induce severe renal injury unless early diagnosis and appropriate treatment are performed. If recurrent UTI is prevented, renal injury can be also reduced. Therefore, we studied the risk factors of recurrent UTI in children. Methods : We performed a retrospective study of 168 children(58 girls and 110... |
Purpose : Turner syndrome is among the most common cytogenetic abnormalities associated with X chromosome. In only 40-60% of Turner syndrome, 45,X monosomy is found and the high prenatal mortality of non-mosaic 45,X has led to the hypothesis that liveborn 45,X individuals may be cryptic mosaics. The presence of Y chromosome is significant because it predisposes affected individuals with Turner syndrome to gonadoblastoma formation.... |
Purpose : Sex hormone binding globulin(SHBG) is produced in liver and binds to testostero-ne and estradiol. Plasma SHBG levels are increased by estrogen and thyrotoxicosis and decreased by testostrone, insulin, growth hormone, prolactin, obesity and noninsulin dependent diabetes mellitus. SHBG levels in patients with NIDDM is known to be higher than normal, but SHBG levels in children with IDDM is controversial.... |
There are ethnic differences in the timing of sexual maturaion. However, averages of sexual maturity rating (SMR) for Korean adolescents were not available until recently. The purpose of this study was to determine averages for the SMR of adolescent girls and boys in Korea. The study population included 3,249 boys and 3,337 girls. The sample comprised 2,406 from the Seoul area,... |
Adolescence is the period in which physical, mental and social maturation occurs and it is an important transit stage, changing from childhood to adulthood. This is a period in which important changes occur physically such as rapid growth in height and weight gain but significant differences in growth may occur for the same age. Therfore, the degree of sexual maturation... |
Mixed gonadal dysenesis is a disorder of sexual differentiation which is characterized by streak gonad associated with contralateral tesis, persistent Mullerian duct structures and/or sex chromosomal mosaicism most commonly with 45, X/46, XY. The authors experienced a case of mixed gonadal dysgensis in a 6-year old child who was reared as female and admitted due to clitoral enlargement. The patient had asymmetrical gonads consisted with... |
Blood pressure measurements were done in 9,346 school children in Seoul area in May, June and September, 1987. Korin BP 103N (automated oscillometric method) was used for blood pressure measurements. The results were as follows. 1) Blood pressure increased according to both increasing age and height. 2) Mean systolic pressure (MSP) increased from 100 mmHg at 6 to 124 mmHg at 18 years of age in boys. On... |
There is suggestive evidence that natural history of urinary tract infection (UTI) in male children differs from that of the disease in female children. We have studied sex and age differences of etiologic organism in 257 patients with UTI who were admitted to the Department of Pediatrics Hanyang University Hospital from January 1978 toDecember 1985. All patient had the positive urine culture and a... |
A case of McCune Albright syndrome in a 8 year old girl was presented. Examination revealed polyostotic fibrous dysplasia, cutaneous pigmentation, sexual precocity and hyperthyroidism. Recently, she has suffered from craniofacial deformity and thyroid gland enlargement. The diagnosis was confirmed by characteristic clinical feature, radiologic evidence,biochemical assay and radioisotopic assay. A review of the literature was made briefly. |
The majority of cases of sexual precocity is idiopathic, but it can be caused by the intracranial lesions, gonadal or adrenal disorders. Clinical studies on the 33 cases of precocious puberty who visited the Dept, of Pediatrics of Yonsei Medical Center from Aug. 1978:to July 1984 were subjected in this study. The careful history taking, physical examination, radiologic and hormonal... |
Intersex is the state of having ambiguous or inappropriate genitalia due to abnormalities of normal mechanisms for sexual development. Three broad subcategories of intersex have been defined according to the histology of the gonad: Female & male pseudohermaphroditism and true hermaphroditism. Twenty two cases of intersex are described. Among them, true hermaphroditism was 7 cas-es, female pseudohermaphroditism 10 cases and... |