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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...
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Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this barrier loses...
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Related Experiment Video

Updated: Jun 21, 2026

Ex Vivo OCT-Based Multimodal Imaging of Human Donor Eyes for Research into Age-Related Macular Degeneration
10:14

Ex Vivo OCT-Based Multimodal Imaging of Human Donor Eyes for Research into Age-Related Macular Degeneration

Published on: May 26, 2023

Cystoid macular edema.

Tryfon G Rotsos1, Marilita M Moschos

  • 1Medical Retina Service, Moorfields Eye Hospital, London, UK. tryfonrotsos@hotmail.com

Clinical Ophthalmology (Auckland, N.Z.)
|August 12, 2009
PubMed
Summary
This summary is machine-generated.

Cystoid macular edema (CME) is reviewed, covering its causes, diagnosis, and treatments. Intravitreal injections of anti-VEGF agents are highlighted as a key therapy for diabetic maculopathy, retinal vein occlusion, and post-cataract surgery.

Keywords:
OCTanti-VEGFcystoid macular edemafluoroangiographymultifocal electroretinography

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Area of Science:

  • Ophthalmology
  • Retinal Diseases
  • Medical Treatments

Background:

  • Cystoid macular edema (CME) presents diverse etiologies including inflammation, diabetes, and post-cataract surgery.
  • Pathophysiology involves chronic inflammation, hypoxia, and macular traction.
  • Current diagnostic modalities include fluoroangiography, optical coherence tomography (OCT), and multifocal electroretinography (mfERG).

Purpose of the Study:

  • To provide a comprehensive review of CME epidemiology, pathophysiology, and etiology.
  • To evaluate diagnostic methods for CME.
  • To discuss current and emerging treatments for CME, focusing on intravitreal injections.

Main Methods:

  • Literature review of epidemiology, pathophysiology, and etiology of CME.
  • Description of diagnostic techniques like OCT and mfERG.
  • Analysis of therapeutic strategies, emphasizing intravitreal injections of anti-VEGF agents and triamcinolone acetonide.

Main Results:

  • Intravitreal anti-VEGF therapy shows significant promise for managing CME in conditions like diabetic maculopathy, central retinal vein occlusion, and post-cataract surgery.
  • Laser treatment and vitrectomy remain options for specific cases.
  • Multicenter clinical trial data and clinical experience support the efficacy of intravitreal injections.

Conclusions:

  • Intravitreal anti-VEGF agents represent a significant advancement in CME treatment.
  • Treatment selection should be tailored to the specific etiology of CME.
  • Further research and clinical experience will continue to refine CME management strategies.