Subclinical hypothyroidism in early childhood: A frequent outcome of transient neonatal hyperthyrotropinemia

Francesca Calaciura, Rosa Maria Motta, Giuseppe Miscio, Graziella Fichera, Daniela Leonardi, Anna Carta, Vincenzo Trischitta, Vittorio Tassi, Lidia Sava, Riccardo Vigneri

Research output: Contribution to journalArticle

Abstract

Newborns with high TSH at birth and with normal free T4 and normal or slightly elevated TSH at the confirmatory examination are considered false positive for congenital hypothyroidism. We evaluated thyroid function, thyroid antibodies, thyroid volume and morphology, thyroperoxidase and TSH receptor genes, and auxological data in 56 false positive children at 16-44 months of age. In these children thyroid function at confirmatory examination was fully normal in 33 (TSH, 0.8-4.9 mU/liter; group I) and nearly normal (borderline elevated TSH, 5.0-11.7 mU/liter) in the other 23 (group II). Compared with 65 control children with normal TSH at birth, false positive children had significantly higher basal serum TSH (mean ± SD, 4.38 ± 2.2 vs. 1.4 ± 0.8 mU/liter; P <0.01). Subclinical hypothyroidism, indicated by increased basal TSH and/or increased TSH response to TRH, was present in 36% children in group I and 70% in group II. Free T4 was within the normal range in all children. Compared with the control group, false positive children had significantly higher free T3 values (4.9 ± 0.8 vs. 3.7 ± 1.0 pmol/liter; P <0.01) and a higher prevalence of antithyroid antibodies (25% vs. 1.5%; P <0.001). Frequent thyroid morphology abnormalities and frequent thyroperoxidase and TSH receptor gene sequence variations were also observed. In conclusion, newborns classified false positive at congenital hypothyroidism screening have a very high risk of subclinical hypothyroidism in infancy and early childhood.

Original languageEnglish
Pages (from-to)3209-3214
Number of pages6
JournalJournal of Clinical Endocrinology and Metabolism
Volume87
Issue number7
DOIs
Publication statusPublished - 2002

Fingerprint

Thyrotropin Receptors
Hypothyroidism
Genes
Thyroid Gland
Antibodies
Screening
Congenital Hypothyroidism
Parturition
Newborn Infant
Reference Values
Control Groups
Serum

ASJC Scopus subject areas

  • Biochemistry
  • Endocrinology, Diabetes and Metabolism

Cite this

Subclinical hypothyroidism in early childhood : A frequent outcome of transient neonatal hyperthyrotropinemia. / Calaciura, Francesca; Motta, Rosa Maria; Miscio, Giuseppe; Fichera, Graziella; Leonardi, Daniela; Carta, Anna; Trischitta, Vincenzo; Tassi, Vittorio; Sava, Lidia; Vigneri, Riccardo.

In: Journal of Clinical Endocrinology and Metabolism, Vol. 87, No. 7, 2002, p. 3209-3214.

Research output: Contribution to journalArticle

Calaciura, F, Motta, RM, Miscio, G, Fichera, G, Leonardi, D, Carta, A, Trischitta, V, Tassi, V, Sava, L & Vigneri, R 2002, 'Subclinical hypothyroidism in early childhood: A frequent outcome of transient neonatal hyperthyrotropinemia', Journal of Clinical Endocrinology and Metabolism, vol. 87, no. 7, pp. 3209-3214. https://doi.org/10.1210/jc.87.7.3209
Calaciura, Francesca ; Motta, Rosa Maria ; Miscio, Giuseppe ; Fichera, Graziella ; Leonardi, Daniela ; Carta, Anna ; Trischitta, Vincenzo ; Tassi, Vittorio ; Sava, Lidia ; Vigneri, Riccardo. / Subclinical hypothyroidism in early childhood : A frequent outcome of transient neonatal hyperthyrotropinemia. In: Journal of Clinical Endocrinology and Metabolism. 2002 ; Vol. 87, No. 7. pp. 3209-3214.
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abstract = "Newborns with high TSH at birth and with normal free T4 and normal or slightly elevated TSH at the confirmatory examination are considered false positive for congenital hypothyroidism. We evaluated thyroid function, thyroid antibodies, thyroid volume and morphology, thyroperoxidase and TSH receptor genes, and auxological data in 56 false positive children at 16-44 months of age. In these children thyroid function at confirmatory examination was fully normal in 33 (TSH, 0.8-4.9 mU/liter; group I) and nearly normal (borderline elevated TSH, 5.0-11.7 mU/liter) in the other 23 (group II). Compared with 65 control children with normal TSH at birth, false positive children had significantly higher basal serum TSH (mean ± SD, 4.38 ± 2.2 vs. 1.4 ± 0.8 mU/liter; P <0.01). Subclinical hypothyroidism, indicated by increased basal TSH and/or increased TSH response to TRH, was present in 36{\%} children in group I and 70{\%} in group II. Free T4 was within the normal range in all children. Compared with the control group, false positive children had significantly higher free T3 values (4.9 ± 0.8 vs. 3.7 ± 1.0 pmol/liter; P <0.01) and a higher prevalence of antithyroid antibodies (25{\%} vs. 1.5{\%}; P <0.001). Frequent thyroid morphology abnormalities and frequent thyroperoxidase and TSH receptor gene sequence variations were also observed. In conclusion, newborns classified false positive at congenital hypothyroidism screening have a very high risk of subclinical hypothyroidism in infancy and early childhood.",
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T1 - Subclinical hypothyroidism in early childhood

T2 - A frequent outcome of transient neonatal hyperthyrotropinemia

AU - Calaciura, Francesca

AU - Motta, Rosa Maria

AU - Miscio, Giuseppe

AU - Fichera, Graziella

AU - Leonardi, Daniela

AU - Carta, Anna

AU - Trischitta, Vincenzo

AU - Tassi, Vittorio

AU - Sava, Lidia

AU - Vigneri, Riccardo

PY - 2002

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N2 - Newborns with high TSH at birth and with normal free T4 and normal or slightly elevated TSH at the confirmatory examination are considered false positive for congenital hypothyroidism. We evaluated thyroid function, thyroid antibodies, thyroid volume and morphology, thyroperoxidase and TSH receptor genes, and auxological data in 56 false positive children at 16-44 months of age. In these children thyroid function at confirmatory examination was fully normal in 33 (TSH, 0.8-4.9 mU/liter; group I) and nearly normal (borderline elevated TSH, 5.0-11.7 mU/liter) in the other 23 (group II). Compared with 65 control children with normal TSH at birth, false positive children had significantly higher basal serum TSH (mean ± SD, 4.38 ± 2.2 vs. 1.4 ± 0.8 mU/liter; P <0.01). Subclinical hypothyroidism, indicated by increased basal TSH and/or increased TSH response to TRH, was present in 36% children in group I and 70% in group II. Free T4 was within the normal range in all children. Compared with the control group, false positive children had significantly higher free T3 values (4.9 ± 0.8 vs. 3.7 ± 1.0 pmol/liter; P <0.01) and a higher prevalence of antithyroid antibodies (25% vs. 1.5%; P <0.001). Frequent thyroid morphology abnormalities and frequent thyroperoxidase and TSH receptor gene sequence variations were also observed. In conclusion, newborns classified false positive at congenital hypothyroidism screening have a very high risk of subclinical hypothyroidism in infancy and early childhood.

AB - Newborns with high TSH at birth and with normal free T4 and normal or slightly elevated TSH at the confirmatory examination are considered false positive for congenital hypothyroidism. We evaluated thyroid function, thyroid antibodies, thyroid volume and morphology, thyroperoxidase and TSH receptor genes, and auxological data in 56 false positive children at 16-44 months of age. In these children thyroid function at confirmatory examination was fully normal in 33 (TSH, 0.8-4.9 mU/liter; group I) and nearly normal (borderline elevated TSH, 5.0-11.7 mU/liter) in the other 23 (group II). Compared with 65 control children with normal TSH at birth, false positive children had significantly higher basal serum TSH (mean ± SD, 4.38 ± 2.2 vs. 1.4 ± 0.8 mU/liter; P <0.01). Subclinical hypothyroidism, indicated by increased basal TSH and/or increased TSH response to TRH, was present in 36% children in group I and 70% in group II. Free T4 was within the normal range in all children. Compared with the control group, false positive children had significantly higher free T3 values (4.9 ± 0.8 vs. 3.7 ± 1.0 pmol/liter; P <0.01) and a higher prevalence of antithyroid antibodies (25% vs. 1.5%; P <0.001). Frequent thyroid morphology abnormalities and frequent thyroperoxidase and TSH receptor gene sequence variations were also observed. In conclusion, newborns classified false positive at congenital hypothyroidism screening have a very high risk of subclinical hypothyroidism in infancy and early childhood.

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