Table 2.

Pathological score as the sum of the score of infiltration of inflammatory cells in the lamina propria, colonic tissue damage and crypt damage.

Score	Infiltration of inflammatory cells in lamina propria	Colonic tissue damage	Crypt damage
0	Infrequent	None	None
1	Elevated with some neutrophils	Isolated focal epithelial damage	Loss of 1/3 of the basal layer
2	Submucosal presence of inflammatory cell clusters	Mucosal erosions and ulcerations	Loss of 2/3 of the basal layer
3	Transmural cell infiltration	Extensive damage deep into the bowel wall	Only the surface epithelium is intact
4			Loss of entire crypts and epithelium