Related Experiment Videos

[Disorders of the thyroid gland in neonates and youth: latent hypothyroidism and hyperthyroidism]

E Reiterer1, M H Borkenstein

  • 1Klinischen Abteilung für Endokrinologie und Diabetologie der Universitätsklinik für Kinder- und Jugendheilkunde, Graz. elke.reiterer@uni-graz.at

Acta Medica Austriaca
|January 9, 2004
PubMed

Insights

Subclinical hypothyroidism presents differently in neonates and youth, often requiring thyroxin therapy for optimal childhood growth. Subclinical hyperthyroidism, though rare, is treated similarly to overt cases.

Area of Science:

  • Pediatric endocrinology
  • Thyroid disorders
  • Neonatal and pediatric health

Context:

  • Subclinical hypothyroidism (SCH) etiology and presentation vary significantly between neonates and young individuals.
  • Neonatal SCH may manifest as jaundice or constipation, linked to thyroid development issues.
  • Hashimoto thyroiditis is the primary cause of SCH in youth.

Purpose:

  • To differentiate the causes and clinical signs of subclinical hypothyroidism in neonates versus children and adolescents.
  • To discuss the controversial indications for thyroxin therapy in subclinical hypothyroidism.
  • To outline the management of subclinical hyperthyroidism in pediatric populations.

Summary:

  • Neonatal subclinical hypothyroidism stems from thyroid hypoplasia, ectopia, or transient issues, presenting with jaundice/constipation.
  • In youth, Hashimoto thyroiditis is the main cause of subclinical hypothyroidism, with thyroxin therapy recommended for growth.
  • Subclinical hyperthyroidism, rare in children, is typically due to Graves' disease or early Hashimoto's and managed like overt hyperthyroidism.

Impact:

  • Highlights the age-specific differences in subclinical thyroid dysfunction.
  • Informs clinical decisions regarding thyroxin treatment for pediatric subclinical hypothyroidism.
  • Provides clarity on managing rare subclinical hyperthyroidism in children.

Related Concept Videos

Hyperthyroidism I: Introduction01:25

Hyperthyroidism I: Introduction

Hyperthyroidism is a type of thyrotoxicosis characterized by the thyroid gland's overproduction of the thyroid hormones triiodothyronine (T3) and thyroxine (T4). This hormone excess increases the basal metabolic rate and enhances sensitivity to catecholamines.DiagnosisDiagnosis is based on clinical features and biochemical testing. It typically shows suppressed thyroid-stimulating hormone (TSH) levels below 0.4 mIU/L, with elevated free T3 and/or T4. Additional tests, including thyroid...
Hypothyroidism II: Pathophysiology01:23

Hypothyroidism II: Pathophysiology

Hypothyroidism is a disorder characterized by insufficient production of thyroid hormones, which regulate metabolism, energy balance, and multiple organ systems.TypesHypothyroidism is classified based on the level of dysfunction. Primary hypothyroidism results from intrinsic thyroid gland dysfunction, causing reduced hormone production despite normal or increased stimulation. Secondary hypothyroidism arises from inadequate thyroid-stimulating hormone (TSH) secretion by the pituitary. Tertiary...
Hyperthyroidism II: Pathophysiology01:27

Hyperthyroidism II: Pathophysiology

Hyperthyroidism is a hypermetabolic state caused by elevated levels of thyroid hormones, triiodothyronine (T3) and thyroxine (T4). It results from dysregulation at the thyroid, pituitary, or immune system level and affects multiple organ systems.PathophysiologyThe most common cause of hyperthyroidism is Graves’ disease, an autoimmune disorder in which antibodies, specifically thyroid-stimulating antibodies (TSAb), a subtype of TSH receptor antibodies (TRAb), bind to and activate TSH receptors...
Graves Disease II: Pathophysiology01:24

Graves Disease II: Pathophysiology

Graves’ disease is an autoimmune disorder characterized by the production of thyroid-stimulating immunoglobulins (TSI) that activate TSH receptors, leading to excessive synthesis and release of thyroid hormones (T3 and T4) and resulting in hyperthyroidism.Among all causes of hyperthyroidism, Graves’ disease is the most common and can happen at any age, though it is more frequent in women. It produces a hypermetabolic state with features such as weight loss, tachycardia, tremor, and heat...
Graves' Disease I: Introduction01:28

Graves' Disease I: Introduction

Graves' disease is an autoimmune disorder that causes hyperthyroidism, or overactivity of the thyroid gland. It results from autoantibodies called thyroid-stimulating immunoglobulins (TSIs), which bind to thyroid-stimulating hormone (TSH) receptors, leading to overstimulation of hormone production and a hypermetabolic state.EtiologyAlthough considered idiopathic, Graves’ disease has well-established contributing factors. There is a strong genetic component, with increased prevalence in...
Goiter01:27

Goiter

Goiter refers to an abnormal enlargement of the thyroid gland that may appear as a diffuse goiter (uniform enlargement) or nodular (single or multiple nodules). Functionally, it is classified as nontoxic (normal/low hormone levels) or toxic (excess hormone production).PathophysiologyDiffuse thyroid enlargement typically results from prolonged stimulation by thyroid-stimulating hormone (TSH) or TSH-like agents, commonly seen in hypothyroidism or iodine deficiency. In contrast, in hyperthyroid...