Table 2.

Microscopic scoring of tissue damage

Score	Microscopic criteria
Sever (+++)	Frequent inflammatory cells, proliferation, edema, and erosion in the epithelial and sub epithelium.
Normal (-)	No changes in the epithelial proliferation, infiltration of inflammatory cells, and dilated blood capillaries.
Mild (+)	Slight inflammatory cells and focally changes in the network vessels, collagen fibers, epithelial prolife-ration, and edema
Moderate (++)	Comparatively frequent inflammatory cells infiltra-tion into epithelium and sub epithelial.