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Related Concept Videos

Cushing Syndrome II: Pathophysiology01:19

Cushing Syndrome II: Pathophysiology

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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...
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The endocrine system sends hormones—chemical signals—through the bloodstream to target cells—the cells the hormones selectively affect. These signals are produced in endocrine cells, secreted into the extracellular fluid, and then diffuse into the blood. Eventually, they diffuse out of the blood and bind to target cells which have specialized receptors to recognize the hormones.
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The endocrine system is an extensive network of glands – organs or tissues in the body that create chemicals that control many bodily functions, that secrete hormones, which are chemical messengers that play essential roles in regulating various bodily functions. These hormones are secreted into the bloodstream and travel throughout the body. They require specific receptors to convey signals to cells possessing these corresponding receptors. This complex signaling mechanism ensures that...
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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...
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The pituitary is a small endocrine organ in the sphenoid bone under the hypothalamus. Primarily, the pituitary in adults has two distinct anatomical and functional regions— the anterior and posterior lobes. During human fetal development, a third pituitary gland region called the pars intermedia atrophies and disappears. However, some of its cells migrate and exist adjacent to the anterior pituitary in adults.
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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...
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[Update on endocrine orbitopathy].

A Eckstein1, U Berchner-Pfannschmidt, D Führer

  • 1Zentrum für Augenheilkunde, Abteilung für Erkrankungen des vorderen Augenabschnittes, Universitätsklinikum Essen, Hufelandstr. 55, 45122, Essen, Deutschland, anja.eckstein@uk-essen.de.

Der Ophthalmologe : Zeitschrift Der Deutschen Ophthalmologischen Gesellschaft
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PubMed
Summary
This summary is machine-generated.

Graves' orbitopathy, an autoimmune condition affecting eye tissues, often accompanies Graves' hyperthyroidism. Treatment varies by disease stage, from anti-inflammatory drugs in active phases to surgery for inactive stages to improve quality of life.

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Area of Science:

  • Ophthalmology
  • Endocrinology
  • Immunology

Context:

  • Graves' orbitopathy (GO) is an autoimmune disorder affecting the ocular adnexa, frequently co-occurring with Graves' hyperthyroidism.
  • Anti-TSH receptor antibodies are key biomarkers for Graves' disease, influencing both thyroid and orbital manifestations.
  • The disease progresses through active inflammatory and inactive stages, impacting patient quality of life.

Purpose:

  • To outline the clinical presentation and management strategies for Graves' orbitopathy.
  • To differentiate treatment approaches based on the active and inactive phases of the disease.

Summary:

  • Active Graves' orbitopathy involves inflammation and symptoms like proptosis and diplopia, managed with treatments such as intravenous steroids and immunomodulatory drugs.
  • Inactive Graves' orbitopathy, characterized by stable defects, is effectively managed with surgical interventions including orbital decompression, muscle recession, and lid surgery.
  • Anti-TSH receptor antibodies play a crucial role in the pathogenesis and progression of both thyroid and ocular conditions in Graves' disease.

Impact:

  • Provides a comprehensive overview of Graves' orbitopathy management, aiding clinicians in patient care.
  • Highlights the importance of distinguishing disease stages for optimal therapeutic outcomes.
  • Emphasizes the significant quality of life improvements achievable through targeted treatments for Graves' orbitopathy.