Park score | Histopathological appearance/damage of bowel wall |
---|---|
Grade 0 | Normal mucosa |
Grade 1 | Subepithelial space at villous tip |
Grade 2 | More extended subepithelial space |
Grade 3 | Epithelial lifting along villus sides |
Grade 4 | Denuded villi |
Grade 5 | Loss of villous tissue |
Grade 6 | Crypt layer infarction |
Grade 7 | Transmucosal infarction |
Grade 8 | Transmural infarction |