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Abstract:
A total of thirty pterygia were studied for mast cells using metachromatic dye (toluidine blue) together with routine histological stains. On microscopic examination, the lesion was differentiated and classified into angiomatous, fibrous and mixed varieties based on the vascular and collagenous components. The mast cell counts were undertaken in all types and were found to have significant correlation with the morphological types when compared to normal conjunctiva. 15.1 +/- 3.1, 22.7 +/- 3.8, 9.5 +/- 3.2 mast cell per mm2 were found in the angiomatous, mixed and fibrous types respectively. In the control material, the mast cell count was 12.4 +/- 2.3 per mm2. The results are discussed. It is believed that mast cells are actively involved in the genesis and progress of pterygium.
Insights
Mast cells, crucial immune cells, show varying counts in different pterygium (wing-like eye tissue) types. This suggests mast cells play a significant role in pterygium development and progression.
Area of Science:
- Ophthalmology
- Immunology
- Histopathology
Background:
- Pterygium is a common ocular surface growth.
- The role of mast cells in pterygium pathogenesis is not fully understood.
Purpose of the Study:
- To investigate the distribution and density of mast cells in different morphological types of pterygium.
- To correlate mast cell counts with the histological classification of pterygium.
Main Methods:
- Histological examination of thirty pterygium specimens.
- Classification of pterygia into angiomatous, fibrous, and mixed types based on vascularity and collagen content.
- Mast cell quantification using toluidine blue staining and microscopic analysis.
Main Results:
- Significant differences in mast cell counts were observed among pterygium types.
- Angiomatous pterygia showed the highest mast cell density (15.1 ± 3.1 cells/mm²), followed by mixed (22.7 ± 3.8 cells/mm²) and fibrous types (9.5 ± 3.2 cells/mm²).
- Mast cell counts in pterygia were significantly different compared to normal conjunctiva (12.4 ± 2.3 cells/mm²).
Conclusions:
- Mast cells are actively involved in the genesis and progression of pterygium.
- The density of mast cells correlates with the specific morphological subtype of pterygium.