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Adrenal Gland Disorders01:27

Adrenal Gland Disorders

Adrenal gland disorders manifest when the production of adrenal hormones deviates from the norm, resulting in either excessive or insufficient concentrations.
Adrenal insufficiency, characterized by insufficient cortisol and aldosterone production, leads to conditions like Addison's disease. This disorder, affecting the adrenal cortex, exhibits symptoms such as skin bronzing, dehydration, low blood pressure, fatigue, and weight loss. Congenital adrenal hyperplasia, a genetic ailment causing...
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Cushing Syndrome II: Pathophysiology

Cortisol production is normally governed by the hypothalamic–pituitary–adrenal (HPA) axis, which maintains hormonal balance through tightly regulated feedback mechanisms. Disruption of this regulatory system is central to the development of Cushing syndrome, whether the excess cortisol originates from external medications or internal pathology. Persistent cortisol elevation alters metabolism, immune function, and endocrine signaling, producing the characteristic clinical features of the...
Transducer Mechanism: Enzyme-Linked Receptors01:27

Transducer Mechanism: Enzyme-Linked Receptors

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Cushing Syndrome I: Introduction01:26

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Cushing syndrome refers to the collection of clinical manifestations that arise when tissues are exposed to excessive amounts of cortisol or cortisol-like medications over an extended period. Cortisol, a glucocorticoid produced by the adrenal cortex, regulates metabolism, immune responses, and the body’s adaptation to stress. When its concentration remains chronically elevated, these physiological pathways become dysregulated, resulting in the characteristic features of the syndrome.Exogenous...
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Emergency and Intensive Care Unit (ICU) applications: Pressor agents increase blood pressure, heart rate, and contractility in shock and organ failure situations. Dopamine can induce vasodilation and stimulate adrenoceptors. Endogenous catecholamines are effective in treating cardiogenic shock. α2-agonists like clonidine can reverse anesthesia-induced hypertension.
Allergies and anaphylaxis:...
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A Novel Method: Super-selective Adrenal Venous Sampling
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Published on: September 15, 2017

Update on pediatric pheochromocytoma.

Bas Havekes1, Johannes A Romijn, Graeme Eisenhofer

  • 1Reproductive Biology and Medicine Branch, Section on Medical Neuroendocrinology, National Institute of Child Health and Human Development, NIH, Bethesda, MD, 20892-1109, USA.

Pediatric Nephrology (Berlin, Germany)
|June 21, 2008
PubMed
Summary

Pediatric pheochromocytomas, rare tumors, require updated diagnostic and treatment strategies due to genetic factors and varied presentations. Early detection via metanephrine tests and genetic screening is crucial for managing these catecholamine-secreting tumors.

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Area of Science:

  • Pediatric Endocrinology
  • Oncology
  • Genetics

Background:

  • Pheochromocytomas are rare pediatric tumors originating from chromaffin cells, synthesizing and secreting catecholamines.
  • Pediatric cases often present as familial, extra-adrenal, bilateral, and multifocal, differing from adult presentations.
  • The clinical presentation is highly variable, earning pheochromocytoma the nickname 'the great mimic'.

Purpose of the Study:

  • To review recent advances in the biochemistry, genetics, and imaging of pediatric pheochromocytomas.
  • To outline updated recommendations for the evaluation and treatment of children with these tumors.
  • To emphasize the importance of genetic testing in pediatric pheochromocytoma management.

Main Methods:

  • Review of current literature on pheochromocytoma diagnosis, genetics, and treatment in children.
  • Emphasis on updated biochemical testing, including plasma or urinary fractionated metanephrines.
  • Discussion of genetic testing implications for hereditary forms and malignant potential.

Main Results:

  • Plasma or urinary fractionated metanephrines are recommended as the primary diagnostic biochemical tests.
  • Preoperative alpha-blockade is essential for all cases, even those synthesizing but not secreting catecholamines.
  • Approximately 40% of pediatric pheochromocytomas have a hereditary basis, necessitating genetic testing.

Conclusions:

  • Updated understanding of pheochromocytoma requires revised diagnostic and management guidelines.
  • Genetic testing is critical for identifying hereditary predispositions and guiding long-term care.
  • Tailored screening, surgical, and systemic treatment strategies are informed by underlying mutations and disease risk.