Search Results

You are looking at 81 - 90 of 1,618 items for

  • Abstract: adolescen* x
  • Abstract: boy* x
  • Abstract: child* x
  • Abstract: girl* x
  • Abstract: neonat* x
  • Abstract: paediatric x
  • Refine by Access: All content x
Clear All Modify Search
Restricted access

E. Artavia-Loria, J.L. Chaussain, P.F. Bougnères, and J.C. Job

Abstract

The frequency of hypoglycemia in 165 children with primary adrenal insufficiency, 118 of whom had Congenital Adrenal Hyperplasia and 47 Addison's Disease, was 18 %. Half of the hypoglycemic episodes occurred in the neonatal period. Hypoglycemia was isolated in 13 children, revealing the disease in 4 newborns with Congenital Adrenal Hypoplasia and in a boy with 11 B Hydroxylase deficiency.

Basal plasma cortisol levels were significantly lower in those of subjects who experienced hypoglycemia ( 47.1 ± 28.6 ng/ml vs. 106.0 ± 86.6 ng/ml, p< 0.001). A significant correlation ( p < 0.001) was found between the plasma concentration of glucose and cortisol at time of hypoglycemia.

Restricted access

J. L. C. Ch'ng, A. Kaiser, J. Lynn, and G. F. Joplin

Abstract. Total parathyroidectomy is required to cure neonatal primary hyperparathyroidism (NPH) as any parathyroid remnant quickly becomes hyperplastic, causing recurrent hypercalcaemia. We present a patient with NPH who had total removal of his eutopic parathyroid glands but continued to have parathyroid hormone secretion from presumed ectopic parathyroid tissue. Hypercalcaemia initially recurred but normal calcium homeostasis was established as the child grew older. We postulate that the underlying defect in NPH is decreased sensitivity to the serum ionic calcium feedback inhibition at the parathyroid receptor level and that this sensitivity can improve with age.

Restricted access

Pierre Ferrier and Thérèse Lemarchand-Beraud

Very little is known yet about thyroid hormone transport capacity of the serum and thyroid hormone protein binding in children. Except for the studies by Haddad (1) and by Dreyer and Man (2), all observations so far published are concerned with hormone transport mechanisms in the adult. In order to establish reference values, thyroid function tests were performed in 35 eumetabolic children (20 boys and 15 girls) aged from 6 weeks to 11 years. In vitro erythrocyte uptake of T3 was measured according to the procedure of Hamolsky et al. (3). Protein binding of T4 was studied at progressive degrees of saturation by paper electrophoresis in tris-maleate buffer at pH 8.6 according to Ingbar et al. (4). Values were compared with those from a group of 21 euthyroid adults, tested in the same laboratory. PBI was found to be higher in children than in adults. This tendency has been noted

Restricted access

L. Kanaris, K. Ntalles, K. Alevizaki, P. Lapatsanis, Ch. Velentzas, P. Katsichtis, E. Georgiou, Ch. Drossos, and D.G. Ikkos

The aim of the present work was to obtain bone mass estimates of healthy Greek children aged 6–18 years. This work was considered worthwhile since similar data are very few in the world litterature (Bonnard 1968, Gryfe et al. 1971), while those for Greece (Livadas et al. 1975) refer to 902 children only (462 boys and 440 girls) aged 5–13 years.

The material of the present study consists of 2.406 schoolboys and 2.451 schoolgirls aged 6–18 years, of whom 864 boys and 1.189 girls were living in Attica, while the remaining 1.542 boys and 1.262 girls were living in communities outside Attica (i.e. Atalanti, Arnea, Elatia and Karpenisi). Standing body height and body weight was measured in all subjects. Furthermore, a plain x–ray of the left hand was taken in all children, using a focal distance of 80 cm.

By means of a micrometer apparatus (Taschenmessloupe TM4, C. Zeiss) the

Restricted access

Z Laron, X L Wang, B Klinger, A Silbergeld, and D E L Wilcken

Abstract

Background: elevated serum lipoprotein(a) (Lp(a)) is a strong risk factor for coronary artery disease (CAD). Genetic factors appear to account for the major variance in Lp(a) levels but the contribution hormones make in modulating Lp(a) levels is not yet clear. In the present investigation we determined the effects of human growth hormone (hGH) and insulin-like growth factor-I (IGF-I) on circulating Lp(a).

Methods: four groups of patients were studied. Group a: adults with GH deficiency (n=7) treated with hGH (0·05 U/kg/day, s.c.); group b: girls with Turner syndrome (n=7) treated with hGH (0·1 U/kg/day, s.c.); group c: prepubertal boys with idiopathic short stature (n=6) treated with the GH secretagogue (GHRP) hexarelin (60 μg t.i.d. intranasally); group d: Laron syndrome patients (n=10) treated with IGF-I (100–200 μg/kg/day, s.c.). Following overnight fasting, serum was sampled before the initiation of treatment and during 6–9 months treatment.

Results: serum IGF-I rose significantly in all the subjects in all four groups. In the first three groups in which IGF-I was elevated by exogenous or endogenous GH stimulation, serum Lp(a) increased significantly (119±35%, P<0·01; 126±44%, P<0·05; 102±29% P<0·01 for groups a, b, and c respectively). By contrast, serum Lp(a) levels decreased in group d to whom exogenous IGF-I was administered (–66±5%, P<0·001). The differential effect of endogenous vs exogenous IGF-I on serum Lp(a) paralleled the behaviour of serum insulin. Insulin was significantly increased in all the subjects receiving hGH or GHRP (65·2±31%, P=0·109; 93·7±53%, P=0·062; 3536·8±52·7%, P<0·01 for groups a, b, and c respectively) whereas insulin levels were reduced following exogenous administration of IGF-I (—34·1±9·1%, P<0·01).

Conclusions: we conclude that long-term GH treatment increases and IGF-I decreases circulating levels of Lp(a). These findings may have clinical relevance in view of the increasing use of hGH in children and adults and the role of Lp(a) as a CAD risk factor.

European Journal of Endocrinology 136 377–381

Free access

L Kornreich, G Horev, M Schwarz, B Karmazyn, and Z Laron

OBJECTIVE: The purpose of the present study was to investigate whether lifelong secretion of high levels of GH, characteristic of Laron syndrome, leads to an increase in the size of the pituitary gland. METHODS: Eleven patients (six females, five males) with Laron syndrome underwent magnetic resonance imaging of the pituitary region with a system operating at 0.5 T. There were nine adults aged 36-68 Years and two children, a 4-Year-old boy and a 9-Year-old girl. The latter patient had been treated with IGF-I (150-180 mg/kg per day) since the age of 3 Years; all the other patients were untreated. The height of the adenohypophysis was measured on the sagittal images and compared with reference values for age and sex. RESULTS: The height of the adenohypophysis was within the normal range for age and gender in all patients, except for one male, who had a small gland. No congenital anomalies of the pituitary-hypothalamic region were detected. CONCLUSION: Despite the lifelong high levels of GH, no pituitary hypertrophy was detected. The anatomy of the pituitary-hypothalamic region in Laron syndrome is normal.

Free access

Y Rakover, A Silbergeld, I Lavi, R Masalha, and IB Shlomo

OBJECTIVES: In the majority of children with short stature, the etiology is unknown. Mutations of the GH receptor (GHR) have been reported in a few children with apparent idiopathic short stature (ISS). These patients had low IGF-I, IGF-binding protein-3 (IGFBP-3) and GH-binding protein (GHBP), but a normal or exaggerated GH response to provocative stimuli, suggestive of partial GH insensitivity (GHI). We attempted to identify children with partial GHI syndrome, based on their response to GH provocative stimuli and other parameters of the GH-IGF-I axis. SUBJECTS AND METHODS: One hundred and sixty-four pre-pubertal children (97 boys, 67 girls) aged 7.2 (0.5-16.75) years were studied. All had short stature with height <3rd centile. The weight, bone age (BA) and body mass index (BMI) of the subjects, as well as the parents' heights and mid parental height (MPH) were assessed. Basal blood samples were taken for IGF-I, IGFBP-3 and GHBP. All subjects underwent a GH provocative test with either clonidine, arginine or insulin. The subjects were divided into three groups: (A) patients with peak GH concentration <18 mIU/l in two different provocative tests (GH deficiency - GHD, n=33); (B) patients with peak GH between 18.2 and 39.8 mIU/l (normal response, n=78); (C) patients with peak GH >40 mIU/l (exaggerated GH response, n=53). RESULTS: No significant differences were found in age, height (standard deviation score (SDS)), parental height (SDS) and the difference between chronological age and bone age (DeltaBA) between the groups. Patients with GHD were heavier (P=0.039) and had significantly higher BMI (SDS) (P=0.001) than the other groups. MPH (SDS) was lower in the group of exaggerated responders (P=0.04) compared with the other groups. No significant differences were found between the groups for the biochemical parameters when expressed nominally or in SDS, except for IGFBP-3 (SDS), which was lower in the GHD group (P=0.005). The GHBP levels were not lower in the group of exaggerated GH response to provocative stimuli. Height (SDS) correlated negatively with basal GH values in pooled data of all the subjects (r=-0.358, P<0.0001), in normal responders (r=-0.45, P<0.0001) and in the exaggerated responders (r=-0.341, P<0.0001), but not in the GHD group. CONCLUSION: Exaggerated GH response to provocative tests alone does not appear to be useful in identifying children with GHI.

Free access

Selmen Wannes, Monique Elmaleh-Bergès, Dominique Simon, Delphine Zénaty, Laetitia Martinerie, Caroline Storey, Georges Gelwane, Anne Paulsen, Emmanuel Ecosse, Nicolas De Roux, Jean Claude Carel, and Juliane Léger

Objective

Non-idiopathic CPP is caused by acquired or congenital hypothalamic lesions visible on MRI or is associated with various complex genetic and/or syndromic disorders. This study investigated the different types and prevalence of non-isolated CPP phenotypes.

Design and Methods

This observational cohort study included all patients identified as having non-idiopathic CPP in the database of a single academic pediatric care center over a period of 11.5 years. Patients were classified on the basis of MRI findings for the CNS as having either hypothalamic lesions or complex syndromic phenotypes without structural lesions of the hypothalamus.

Results

In total, 63 consecutive children (42 girls and 21 boys) with non-isolated CPP were identified. Diverse diseases were detected, and the hypothalamic lesions visible on MRI (n = 28, 45% of cases) included hamartomas (n = 17; either isolated or with an associated syndromic phenotype), optic gliomas (n = 8; with or without neurofibromatosis type 1), malformations (n = 3) with interhypothalamic adhesions (n = 2; isolated or associated with syndromic CNS midline abnormalities, such as optic nerve hypoplasia, ectopic posterior pituitary) or arachnoid cysts (n = 1). The patients with non-structural hypothalamic lesions (n = 35, 55% of cases) had narcolepsy (n = 9), RASopathies (n = 4), encephalopathy or autism spectrum disorders with or without chromosomal abnormalities (n = 15) and other complex syndromic disorders (n = 7).

Conclusion

Our findings suggest that a large proportion (55%) of patients with non-isolated probable non-idiopathic CPP may have complex disorders without structural hypothalamic lesions on MRI. Future studies should explore the pathophysiological relevance of the mechanisms underlying CPP in these disorders.

Free access

L Kostalova, L Leskova, A Kapellerova, and V Strbak

OBJECTIVE: The aim was to investigate the relationship between body mass index (BMI), plasma leptin, glucose, insulin and C-peptide levels in the offspring of diabetic mothers (DM) and non-diabetic healthy mothers (HM). DESIGN: Seventy-two offspring (37 girls and 35 boys, age 4-20 years) of DM were investigated in a prospective study. Those 14-16 years old (Tanner stage II-IV) were compared with age-matched offspring of HM (33 girls and 33 boys). RESULTS: BMI strongly correlated with plasma leptin concentration in the offspring of both DM and HM children. There were higher BMI and plasma leptin and glucose levels in DM than in HM children. There was no difference in plasma insulin or C-peptide levels between HM and age-matched DM children. There was a highly significant positive correlation between plasma leptin and C-peptide in boys of DM. CONCLUSIONS: The higher plasma leptin found in the offspring of DM reflects their higher BMI. A moderately high but still normal glycemia might be a preclinical sign of insulin resistance or other disturbance of glucoregulation.

Free access

M Salerno, R Militerni, S Di Maio, C Bravaccio, N Gasparini, and A Tenore

BACKGROUND: The intellectual outcome in children with congenital hypothyroidism detected by neonatal screening is generally good; however, subtle neurological dysfunctions, subnormal IQ, or both, have been reported. OBJECTIVE: To evaluate the intellectual outcome in 12-year-old patients with congenital hypothyroidism, detected by neonatal screening, in an attempt to identify factors that may affect intellectual development. METHODS: The intelligence quotient (IQ) of 40 children with congenital hypothyroidism was evaluated at 12 years of age, using the Wechsler Intelligence Scale for Children -- Revised, and compared with the IQ of 40 healthy siblings (control group). RESULTS: The mean IQ score (88.4+/-13.1) was not significantly different from that of the control group (93.4+/-10.7). Thirteen patients showed subnormal IQ score (72.4+/-4.9) compared with their siblings (86.7+/-9.6; P<0.0001) and with the other patients (96.1+/-9.6; P<0.0001). The low IQ score was associated with lower serum concentrations of thyroxine at diagnosis, poor treatment compliance during follow-up and lower familial IQ. Interviews with parents of children with congenital hypothyroidism revealed that a refusal to acknowledge the disease was linked to poor attention to the child's emotional life and to poor treatment compliance in some cases (11%). CONCLUSION: Even though the mean IQ score in patients with congenital hypothyroidism falls within normal for the control population, low IQ scores may be present in patients with severe hypothyroidism, inadequate compliance to replacement therapy during follow-up and poor parental pedagogic attitude.