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Related Concept Videos

Adrenal Gland Disorders01:27

Adrenal Gland Disorders

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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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Anatomy of the Adrenal Glands01:17

Anatomy of the Adrenal Glands

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The adrenal or supra-renal glands, situated above the kidneys and aligned with the twelfth rib, are paired pyramid-shaped structures crucial for the body's stress response. During stress, these glands secrete hormones vital for adaptive physiological reactions.
These glands possess a distinctive yellow tinge due to the stored cholesterol and fatty acids required for hormone synthesis. They are encased in a fibrous capsule and cushioned by fat.
The adrenal gland comprises two distinct...
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Sympathetic Pathways: Collateral Ganglia and Adrenal Medulla01:27

Sympathetic Pathways: Collateral Ganglia and Adrenal Medulla

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The sympathetic pathways of the collateral ganglia and adrenal medulla serve unique but interconnected roles in the sympathetic response.
Collateral Ganglia
Sympathetic preganglionic axons reach the collateral ganglia along the route of splanchnic nerves. These nerves bypass the sympathetic trunk and communicate with sympathetic postganglionic neurons housed in the prevertebral ganglia. These ganglia supply the organs of the abdominopelvic cavity.
The greater splanchnic nerve, formed by the...
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Hormones of the Adrenal Glands01:31

Hormones of the Adrenal Glands

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Adrenal hormones play a pivotal role in maintaining the body's electrolyte balance and orchestrating responses to stress, showcasing the intricate functions of the adrenal cortex and medulla.
The adrenal cortex, a powerhouse of hormone synthesis, generates over two dozen corticosteroid hormones. The zona glomerulosa produces mineralocorticoids, exemplified by aldosterone, influencing the electrolyte composition of body fluids. The synthesis of glucocorticoids such as cortisol and...
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Renal Tubule and Collecting Duct01:24

Renal Tubule and Collecting Duct

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The renal tubule is divided into three parts: the proximal convoluted tubule (PCT), the Loop of Henle (LOH), and the distal convoluted tubule (DCT).
Proximal Convoluted Tubule (PCT):
The PCT is the initial segment of the renal tubule, extending from the Bowman's capsule that encloses the glomerulus. Its convoluted structure and microvilli-lined cells increase the surface area for reabsorption. The PCT reabsorbs glucose, amino acids, sodium, and water from the filtrate, ensuring essential...
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Hypothalamic-Pituitary Axis01:37

Hypothalamic-Pituitary Axis

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The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor.
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A Novel Method: Super-selective Adrenal Venous Sampling
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Contralateral adrenal abnormalities in Conn's syndrome.

Jacqueline I Lee1, Sarah C Oltmann1, Stacey L Woodruff1

  • 1Department of Surgery, University of Texas Southwestern Medical Center, Dallas, Texas.

The Journal of Surgical Research
|August 5, 2015
PubMed
Summary

Patients with aldosterone-producing adenomas (APA) and contralateral adrenal abnormalities undergoing adrenalectomy have durable outcomes if final pathology confirms APA. Nodular hyperplasia may indicate ongoing hypersecretion, warranting surveillance.

Keywords:
Adrenal noduleConn's syndromePrimary hyperaldosteronism

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Area of Science:

  • Endocrinology
  • Surgical Oncology
  • Nephrology

Background:

  • Primary hyperaldosteronism diagnosis involves imaging to detect aldosterone-producing adenomas (APA).
  • Some patients present with synchronous, contralateral adrenal abnormalities alongside APA.
  • Adrenal vein sampling (AVS) distinguishes unilateral from bilateral aldosterone hypersecretion.

Purpose of the Study:

  • To evaluate the efficacy of unilateral adrenalectomy for APA in patients with co-existing contralateral adrenal abnormalities.
  • To assess the durability of surgical outcomes in this specific patient subset.

Main Methods:

  • Retrospective review of 103 patients who underwent adrenalectomy for APA confirmed by AVS.
  • Analysis of preoperative/postoperative data, including imaging, laboratory results, and pathology.
  • Focus on the 18 patients (17%) with discordant AVS and imaging findings.

Main Results:

  • All patients with initial hypokalemia achieved normokalemia post-surgery.
  • Four patients required increased antihypertensive medication; their pathology revealed nodular hyperplasia.
  • Median follow-up was 3.5 years.

Conclusions:

  • Unilateral adrenalectomy for APA provides durable outcomes in patients with bilateral adrenal abnormalities when final pathology confirms APA.
  • Nodular hyperplasia on pathology may predict persistent aldosterone hypersecretion.
  • Consideration of a biochemical surveillance algorithm for this patient group is recommended.