Epibulbar mucogenic subconjunctival cysts.

Area of Science:

• Ophthalmology
• Cell Biology
• Pathology

Background:

• Epibulbar subconjunctival cysts are rare ocular growths.
• Understanding the pathogenesis of these cysts is crucial for diagnosis and management.

Observation:

• Two patients presented with freely movable epibulbar subconjunctival cysts without apparent cause.
• Histopathology revealed cysts lined by nonkeratinizing epithelial cells and goblet cells.
• Cysts contained mucoid material and had minimal stroma.

Findings:

• Electron microscopy showed conjunctival epithelial cells actively producing mucous granules.
• A relative lack of hemidesmosomes was observed in the epithelial cells.
• Mechanical displacement and active mucus secretion are proposed mechanisms for cyst formation.

Implications:

• The findings suggest a novel mechanism for epibulbar cyst development.
• The reduced hemidesmosomes may explain the characteristic mobility of these cysts.
• Further research can elucidate the specific molecular pathways involved in cystogenesis.