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Related Concept Videos

Graves' Disease I: Introduction01:28

Graves' Disease I: Introduction

Graves' disease is an autoimmune disorder that causes hyperthyroidism, or overactivity of the thyroid gland. It results from autoantibodies called thyroid-stimulating immunoglobulins (TSIs), which bind to thyroid-stimulating hormone (TSH) receptors, leading to overstimulation of hormone production and a hypermetabolic state.EtiologyAlthough considered idiopathic, Graves’ disease has well-established contributing factors. There is a strong genetic component, with increased prevalence in...
Graves Disease II: Pathophysiology01:24

Graves Disease II: Pathophysiology

Graves’ disease is an autoimmune disorder characterized by the production of thyroid-stimulating immunoglobulins (TSI) that activate TSH receptors, leading to excessive synthesis and release of thyroid hormones (T3 and T4) and resulting in hyperthyroidism.Among all causes of hyperthyroidism, Graves’ disease is the most common and can happen at any age, though it is more frequent in women. It produces a hypermetabolic state with features such as weight loss, tachycardia, tremor, and heat...
Cytotoxic Edema: Pathophysiology01:21

Cytotoxic Edema: Pathophysiology

Cytotoxic edema is a form of cerebral edema characterized by intracellular swelling of neurons, astrocytes, and other glial cells. It develops when the mechanisms responsible for maintaining ionic gradients across the cell membrane become impaired. Under normal physiological conditions, the sodium–potassium ATPase actively transports sodium ions out of the cell and potassium ions into the cell, preserving osmotic balance and enabling electrical signaling. This pump requires a continuous supply...
Cushing Syndrome II: Pathophysiology01:19

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...
Secondary Lymphoid Organs01:15

Secondary Lymphoid Organs

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Related Experiment Video

Updated: Jun 15, 2026

Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia
06:15

Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia

Published on: August 9, 2024

[Histiocytic disorders with orbital involvement].

T Civit1, S Colnat-Coulbois, B Marie

  • 1Département de neurochirurgie, hôpital Central, CHU de Nancy, 29, avenue de Lattre-de-Tassigny, 54000 Nancy, France. t.civit@chu-nancy.fr

Neuro-Chirurgie
|March 16, 2010
PubMed
Summary
This summary is machine-generated.

Eosinophilic granuloma of bone is the most common orbital histiocytic disorder, often requiring surgery. Other rare histiocytic disorders, like Erdheim-Chester disease, can have poor prognoses.

Related Experiment Videos

Last Updated: Jun 15, 2026

Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia
06:15

Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia

Published on: August 9, 2024

Area of Science:

  • Histiocytic disorders
  • Orbital pathology
  • Bone diseases

Background:

  • Eosinophilic granuloma of bone (EGB) is the most frequent histiocytic disorder affecting the orbit.
  • Orbital involvement typically presents as bony defects with soft-tissue extension.
  • Rosai-Dorfman disease also commonly affects orbital sites.

Purpose of the Study:

  • To summarize the key features of histiocytic disorders involving the orbit.
  • To highlight the commonality of EGB and the rarity of other forms.
  • To underscore the prognostic implications of certain rare histiocytic disorders.

Main Methods:

  • Review of imaging characteristics of orbital histiocytic disorders.
  • Analysis of clinical presentation and management of EGB.
  • Comparison of EGB with other rare histiocytic disorders affecting the orbit.

Main Results:

  • Eosinophilic granuloma of bone is the most common orbital histiocytic disorder.
  • Imaging often reveals bony defects and intra-orbital soft-tissue masses.
  • Surgical debulking is a frequent treatment modality for EGB.
  • Rosai-Dorfman disease is another notable cause of orbital histiocytosis.
  • Rare histiocytic disorders, such as Erdheim-Chester disease, may present with poor outcomes.

Conclusions:

  • Eosinophilic granuloma of bone is the predominant histiocytic disorder in the orbit.
  • Prompt diagnosis and surgical intervention are crucial for managing orbital EGB.
  • Awareness of rare, aggressive histiocytic disorders is essential for appropriate patient management and prognosis.