Score | Lesion description |
---|---|
0 | No lesion |
1 | Epithelium hyperplasia, ciliated cells present in standard quantity with dense cilia |
2 | Epithelium hyperplasia, reduced cilia density and mild presence of hemorrhage |
3 | Epithelium hyperplasia with largely reduced cilia density, glandular hyperplasia and increased number of goblet cells |
4 | Epithelium hyperplasia, glandular hyperplasia, increased number of goblet cells and presence of inflammatory cells infiltration |