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The Contribution of Inflammatory Cell Infiltration to Conjunctival Inclusion Cyst Formation
1Department of Ophthalmology, National Defense Medical College, Hamamatsu, Japan
Insights
Conjunctival inclusion cysts were found in pterygium, vernal conjunctivitis, pyogenic granuloma, and pingueculitis, suggesting inflammation plays a role in their formation. Pinguecula, lacking inflammation, showed no cysts.
Area of Science:
- Ophthalmology
- Histopathology
Background:
- Conjunctival inclusion cysts are a recognized histopathological finding.
- The role of inflammation in their formation is not fully understood.
Purpose of the Study:
- To investigate the incidence of conjunctival inclusion cysts in specific conjunctival disorders.
- To determine if inflammatory cell infiltration is associated with cyst formation.
Main Methods:
- Histopathological examination of conjunctival specimens.
- Analysis included pterygium, vernal conjunctivitis, pyogenic granuloma, and pingueculitis.
- Pinguecula specimens without inflammation served as controls.
Main Results:
- Inclusion cysts were identified in 5/55 pterygium cases, 2/12 vernal conjunctivitis cases, 1/4 pyogenic granuloma cases, and 1/2 pingueculitis cases.
- No inclusion cysts were found in 20 pinguecula control cases.
- A correlation was observed between inflammatory cell infiltration and the presence of inclusion cysts.
Conclusions:
- Inflammatory cell infiltration in the subepithelial connective tissue may contribute to the formation of conjunctival inclusion cysts.
- This association was noted in pterygium, vernal conjunctivitis, pyogenic granuloma, and pingueculitis.
Abstract:
Purpose: The incidence of inclusion cysts was examined histopathologically in conjunctival disorders where inflammatory cell infiltration was seen in the subepithelial connective tissue.Method: The incidence of inclusion cysts was examined histopathologically in pterygium, vernal conjunctivitis, pyogenic granuloma and pingueculitis. The specimens of pinguecula were used as control.Results: Inclusion cysts were recognized in 5/(55) cases of pterygium, 2/(12) cases of vernal conjunctivitis, 1/(4) cases of pyogenic granuloma, and 1/(2) cases of pingueculitis. On the other hand no inclusion cyst was recognized in 20 cases of pinguecula in which no inflammatory cell infiltration was seen.Conclusions: Inflammatory cell infiltration may contribute to the formation of conjunctival inclusion cysts in pterygium, pingueculitis, vernal conjunctivitis and pyogenic granuloma.