Cornea pseudoguttata: a clinical and histopathologic description of endothelial cell edema

Area of Science:

• Ophthalmology
• Corneal Diseases
• Electron Microscopy

Background:

• Cornea guttata is a corneal condition involving localized thickenings of Descemet's membrane.
• This condition disrupts the normal endothelial mosaic, appearing as dark spots in specular reflection.
• A similar clinical appearance can arise transiently during episodes of iritis and corneal inflammation.

Observation:

• Three cases of a transient clinical entity mimicking cornea guttata were observed.
• Experimental induction of iritis and corneal inflammation in rabbits produced a similar transient appearance of dark spots.
• These spots interrupted the normal endothelial mosaic seen in specular reflection.

Findings:

• Scanning and transmission electron microscopy were used to examine the affected corneas.
• The study identified transient endothelial cell edema in the cornea during these inflammatory episodes.
• This edema was termed "pseudoguttata" to distinguish it from true cornea guttata.

Implications:

• The findings differentiate true cornea guttata from transient inflammatory conditions with similar clinical presentations.
• Understanding this distinction is crucial for accurate diagnosis and appropriate patient management.
• This research highlights the reversibility of endothelial changes associated with specific inflammatory insults.