Pediatric reference intervals for thyroid hormone levels from birth to adulthood: a retrospective study

Kapelari, Klaus; Kirchlechner, Christine; Högler, Wolfgang; Schweitzer, Katharina; Virgolini, Irene; Moncayo, Roy

doi:10.1186/1472-6823-8-15

Cited by 162 publications

(144 citation statements)

References 40 publications

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“…Therefore, TSH and FT 4 values in these subgroups might be hard to compare among them. In fact, it is known that TSH values are greatest during the first months of life and subsequently tend to decrease with age (50).…”

Section: Discussionmentioning

confidence: 99%

Five-year prospective evaluation of thyroid function in girls with subclinical mild hypothyroidism of different etiology

Waśniewska

Aversa

Salerno

et al. 2015

European Journal of Endocrinology

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Aim: To follow-up for 5 years thyroid status evolution in 127 girls with mild (TSH 5-10 mU/l) subclinical hypothyroidism (SH) of different etiologies. Patients: The population was divided into two age-matched groups of 42 and 85 girls with either idiopathic (group A) or Hashimoto's thyroiditis (HT)-related SH (group B). Group B was in turn divided into three subgroups, according to whether SH was either isolated or associated with Turner syndrome (TS) or Down syndrome (DS). Results: At the end of follow-up the rate of girls who became euthyroid was higher in group A (61.9% vs 10.6%), whereas the rates of patients who remained SH (55.3% vs 26.2%), became overtly hypothyroid (30.6% vs 11.9%) or required levothyroxine (L-T 4 ) therapy (63.5% vs 23.8%) were higher in group B. Among the girls of group B, the risk of remaining SH or developing overt hypothyroidism was higher in the subgroups with TS or DS than in those with isolated HT. Conclusions: Long-term prognosis of mild and idiopathic SH is frequently benign, even though a L-T 4 treatment may be needed throughout follow-up in almost a quarter of cases; long-term prognosis is different in the girls with either idiopathic or HT-related SH; and the association with either TS or DS impairs the outcome of HT-related SH.

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Section: Discussionmentioning

confidence: 99%

Five-year prospective evaluation of thyroid function in girls with subclinical mild hypothyroidism of different etiology

Waśniewska

Aversa

Salerno

et al. 2015

European Journal of Endocrinology

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“…In the neonates, it was defined based on serum TSH and fT 4 sampled in the first week in 38, and on TSH only, determined on capillary sampling performed for the neonatal screening for congenital hypothyroidism, in nine euthyroid neonates (21,22).…”

Section: Methodsmentioning

confidence: 99%

Predictive value of maternal second-generation thyroid-binding inhibitory immunoglobulin assay for neonatal autoimmune hyperthyroidism

Payrat

Chikh

Bossard

et al. 2014

European Journal of Endocrinology

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Context: Hyperthyroidism occurs in 1% of neonates born to mothers with active or past Graves' disease (GD). Current guidelines for the management of GD during pregnancy were based on studies conducted with first-generation thyroid-binding inhibitory immunoglobulin (TBII) assays. Objective: This retrospective study was conducted in order to specify the second-generation TBII threshold predictive of fetal and neonatal hyperthyroidism, and to identify other factors that may be helpful in predicting neonatal hyperthyroidism. Methods: We included 47 neonates born in the Lyon area to 42 mothers harboring measurable levels of TBII during pregnancy. TBII measurements were carried out in all mothers; bioassays were carried out in 20 cases. Results: Nine neonates were born with hyperthyroidism, including five with severe hyperthyroidism requiring treatment. Three neonates were born with hypothyroidism. All hyperthyroid neonates were born to mothers with TBII levels O5 IU/l in the second trimester (sensitivity, 100% and specificity, 43%). No mother with TSH receptor-stimulating antibodies (TSAb measured by bioassay) below 400% gave birth to a hyperthyroid neonate. Among mothers of hyperthyroid neonates, who required antithyroid drugs during pregnancy, none could stop treatment before delivery. Analysis of TBII evolution showed six unexpected cases of increasing TBII values during pregnancy. Conclusion: Maternal TBII value over 5 IU/l indicates a risk of neonatal hyperthyroidism. Among these mothers, a TSAb measurement contributes to identify more specifically those who require a close fetal thyroid ultrasound follow-up. These results should be confirmed in a larger series.

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“…In cord blood, TSH, FT3 and FT4 levels (Supplementary Table A.2) are within normal range expected at 3 months (Kapelari et al 2008). …”

Section: Resultsmentioning

confidence: 99%

Perinatal exposure to chlordecone, thyroid hormone status and neurodevelopment in infants: The Timoun cohort study in Guadeloupe (French West Indies)

Cordier

Bouquet

Warembourg

et al. 2015

Environmental Research

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Background: Perinatal exposure to endocrine-disrupting chemicals may affect thyroid hormones homeostasis and impair brain development. Chlordecone, an organochlorine insecticide widely used in the French West Indies has known estrogenic and progestin properties, but no data is available, human or animal, on its action on thyroid hormone system. Objectives: Our aim was to evaluate the impact of perinatal exposure to chlordecone on the thyroid hormone system of a sample of infants from the Timoun mother-child cohort in Guadeloupe and their further neurodevelopment.Methods: Chlordecone was measured in cord blood and breast milk samples. Thyroid stimulating hormone (TSH), free tri-iodothyronine (FT3), free thyroxine (FT4) were determined in child blood at 3 months (n = 111). Toddlers were further assessed at 18 months using an adapted version of the Ages and Stages Questionnaire (ASQ). Results:Cord chlordecone was associated with an increase in TSH in boys, whereas postnatal exposure was associated with a decrease in FT3 overall, and in FT4 among girls. Higher TSH level at 3 months was positively associated with the ASQ score of fine motor development at 18 months among boys, but TSH did not modify the association between prenatal chlordecone exposure and poorer ASQ fine motor score. Conclusions:Perinatal exposure to chlordecone may affect TSH and thyroid hormone levels at 3 months, differently according to the sex of the infant. This disruption however did not appear to intervene in the pathway between prenatal chlordecone exposure and fine motor child development.

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Pediatric reference intervals for thyroid hormone levels from birth to adulthood: a retrospective study

Cited by 162 publications

References 40 publications

Five-year prospective evaluation of thyroid function in girls with subclinical mild hypothyroidism of different etiology

Five-year prospective evaluation of thyroid function in girls with subclinical mild hypothyroidism of different etiology

Predictive value of maternal second-generation thyroid-binding inhibitory immunoglobulin assay for neonatal autoimmune hyperthyroidism

Perinatal exposure to chlordecone, thyroid hormone status and neurodevelopment in infants: The Timoun cohort study in Guadeloupe (French West Indies)

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