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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...
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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...
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Congenital hypopituitarism associated with hyperammonemia.

Abhay Bhoyar1, Andrew Short

  • 1Birmingham Children's Hospital, Steelhouse Lane, Birmingham, UK. abhaybhoyar@yahoo.com

Indian Journal of Pediatrics
|February 12, 2009
PubMed
Summary

Neonatal hypopituitarism, a critical condition, can be fatal if untreated. Early endocrine investigation is crucial for diagnosing this treatable metabolic disorder in newborns presenting with severe hypoglycemia and hyperammonemia.

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Area of Science:

  • Pediatric Endocrinology
  • Neonatal Medicine
  • Metabolic Disorders

Background:

  • Neonatal hypopituitarism is a rare, life-threatening condition.
  • Metabolic disturbances associated with this disorder can be fatal if not promptly addressed.
  • Early diagnosis and treatment are essential for improving outcomes.

Observation:

  • A newborn presented with severe symptomatic hypoglycemia and hyperammonemia.
  • Initial investigations suggested an inborn error of metabolism.
  • A magnetic resonance imaging (MRI) brain scan provided initially reassuring but ultimately misleading results.

Findings:

  • Despite initial misdiagnosis, comprehensive endocrine investigations were performed.
  • The diagnostic process eventually identified neonatal hypopituitarism as the underlying cause.
  • Timely diagnosis enabled appropriate treatment initiation.

Implications:

  • This case highlights the importance of considering neonatal hypopituitarism in newborns with unexplained metabolic crises.
  • It underscores the limitations of initial diagnostic imaging, such as MRI, in complex neonatal cases.
  • Emphasizes the critical role of thorough endocrine evaluation for accurate diagnosis and effective management of neonatal metabolic disorders.