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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...
Hyperthyroidism II: Pathophysiology01:27

Hyperthyroidism II: Pathophysiology

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 receptors...
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...
Hypothyroidism II: Pathophysiology01:23

Hypothyroidism II: Pathophysiology

Hypothyroidism is a disorder characterized by insufficient production of thyroid hormones, which regulate metabolism, energy balance, and multiple organ systems.TypesHypothyroidism is classified based on the level of dysfunction. Primary hypothyroidism results from intrinsic thyroid gland dysfunction, causing reduced hormone production despite normal or increased stimulation. Secondary hypothyroidism arises from inadequate thyroid-stimulating hormone (TSH) secretion by the pituitary. Tertiary...
Hyperthyroidism I: Introduction01:25

Hyperthyroidism I: Introduction

Hyperthyroidism is a type of thyrotoxicosis characterized by the thyroid gland's overproduction of the thyroid hormones triiodothyronine (T3) and thyroxine (T4). This hormone excess increases the basal metabolic rate and enhances sensitivity to catecholamines.DiagnosisDiagnosis is based on clinical features and biochemical testing. It typically shows suppressed thyroid-stimulating hormone (TSH) levels below 0.4 mIU/L, with elevated free T3 and/or T4. Additional tests, including thyroid...
Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...

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Related Experiment Video

Updated: May 9, 2026

Transoral Endoscopic Thyroidectomy Vestibular Approach for Thyroid Lobectomy
05:12

Transoral Endoscopic Thyroidectomy Vestibular Approach for Thyroid Lobectomy

Published on: May 12, 2023

[Modified orbital decompression for severe thyroid associated ophthalmopathy].

Yi Wang1, Li-hua Xiao, Zhong-kun Yang

  • 1Institute of Orbital Diseases, the General Hospital of the Armed Police Force, Beijing, China.

[Zhonghua Yan Ke Za Zhi] Chinese Journal of Ophthalmology
|July 23, 2013
PubMed
Summary

This study introduces a modified orbital decompression technique for severe thyroid-associated ophthalmopathy (TAO). The new approach effectively reduces proptosis and improves visual acuity with minimal scarring and few serious complications.

Related Experiment Videos

Last Updated: May 9, 2026

Transoral Endoscopic Thyroidectomy Vestibular Approach for Thyroid Lobectomy
05:12

Transoral Endoscopic Thyroidectomy Vestibular Approach for Thyroid Lobectomy

Published on: May 12, 2023

Area of Science:

  • Ophthalmology
  • Surgical Techniques
  • Endocrinology

Context:

  • Thyroid-associated ophthalmopathy (TAO) can cause severe vision impairment and disfigurement.
  • Traditional orbital decompression methods may involve extensive surgical approaches.
  • Minimally invasive techniques are sought to improve outcomes and reduce morbidity.

Purpose:

  • To present a novel, minimally invasive orbital decompression technique for severe TAO.
  • To evaluate the efficacy and safety of this modified approach in reducing proptosis and improving visual function.
  • To assess the impact on compressive optic neuropathy (CON), proptosis, and exposure keratopathy.

Summary:

  • A retrospective review of 40 patients (66 eyes) with severe TAO undergoing a modified orbital decompression via eyelid crease or lateral sub-brow S-shape approach with transcaruncular access.
  • The technique involved decompressing the deep lateral, medial walls, and orbital floor.
  • Outcomes included visual acuity, exophthalmometry, diplopia, clinical activity score (CAS), and CT scans, with a 6-month follow-up.

Impact:

  • The modified technique demonstrated significant improvement in visual acuity for CON (56.7%) and substantial proptosis reduction (mean 8.1-11.4 mm).
  • It effectively reduced inflammatory activity (CAS) and aided in healing keratopathy.
  • The procedure showed a favorable safety profile with no serious complications, though new-onset or aggravated diplopia occurred in a subset of patients.