Table 2.

The pathological histological scoring

Inflammation	Depth of the lesion	Extent of disease (%)	Crypt destruction	Score
none	none	none	none	0
Mild, inflammatory cells infiltration mucous layer < 1/3	Mucous membrane layer	1–25	1/3 of the basement crypt was destroyed	1
Moderate, inflammatory cell infiltration was more than 1/3 of the full mucosal layer but less than 2/3 of the mucosal layer	Mucosa and submucosa	26–50	2/3 of the basement crypts were destroyed	2
Serious, the infiltration of inflammatory cells exceeded 2/3 of the total mucosal layer	Full-thickness inflammation	51–75	Only part of the epithelium is intact	3
		76–100	All crypts and epithelium are damaged	4