Table 2.

Mucosal injury scale from Chiu et al[23]

Grade	Definition
0	Normal mucosal villi
1	Development of subepithelial Gruenhagen’s space at the apex of the villus, often with capillary congestion
2	Extension of the subepithelial space with moderate lifting of the epithelial layer from the lamina propria
3	Massive epithelial lifting down the sides of villi, possibly with few denuded tips
4	Denuded villi with lamina propria and dilated capillaries exposed, possibly with increased cellularity of lamina propria
5	Digestion and disintegration of the lamina propria, hemorrhage and ulceration