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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

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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.
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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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Radiological Investigation III: Pulmonary Angiogram and PET Scan01:13

Radiological Investigation III: Pulmonary Angiogram and PET Scan

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Radiological investigations are paramount in the diagnosis and management of various pulmonary diseases. Two essential investigations are the Pulmonary Angiogram and the Positron Emission Tomography (PET) Scan.
Pulmonary Angiogram
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Adrenergic Receptors: β Subtype01:26

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β-adrenoceptors have varied sensitivities towards adrenaline, noradrenaline, and isoprenaline. The order of agonist potency is as follows:
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A Novel Method: Super-selective Adrenal Venous Sampling
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Apparently Benign 131 I Adrenal Uptake.

Daniela Travaglio Morales1, Michael C Kreissl2, Florian Fischer1

  • 1From the Nuclear Medicine Department, University Hospital Halle, Halle (Saale).

Clinical Nuclear Medicine
|August 2, 2024
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Summary
This summary is machine-generated.

A rare case of papillary thyroid cancer follow-up revealed a false-positive radioiodine uptake in the adrenal gland. Further MRI and lab tests confirmed a benign cause, not metastasis.

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Area of Science:

  • Endocrinology
  • Nuclear Medicine
  • Oncology

Background:

  • Papillary thyroid cancer (PTC) requires lifelong monitoring post-thyroidectomy.
  • Radioiodine (131I) scintigraphy is crucial for detecting residual disease or metastases.
  • Recombinant thyroid-stimulating hormone (rhTSH) is used to stimulate radioiodine uptake for diagnostic purposes.

Observation:

  • A 60-year-old man with PTC showed focal radioiodine uptake in the right adrenal gland during follow-up scintigraphy after rhTSH administration.
  • This uptake was not present on initial post-therapeutic scans, raising suspicion for adrenal metastasis.
  • Subsequent contrast-enhanced MRI and endocrine laboratory tests were performed for further evaluation.

Findings:

  • The diagnostic workup, including MRI and laboratory tests, indicated a benign etiology for the adrenal uptake.
  • This represents a rare instance of a false-positive radioiodine uptake in the adrenal gland.
  • One-year imaging follow-up demonstrated no significant changes in the adrenal lesion.

Implications:

  • False-positive radioiodine uptake can mimic adrenal metastases in thyroid cancer patients.
  • Comprehensive diagnostic workup is essential to differentiate benign conditions from metastatic disease.
  • Careful interpretation of scintigraphy results, alongside advanced imaging and laboratory data, is vital for accurate patient management.