Table 3.

Histological grading of intestinal inflammation.

	Score	Characteristic(s)
Infiltration of inflammatory	0	rare inflammatory cells in the lamina propria
Cells	1	increased numbers of inflammatory cells, including neutrophils in the lamina propria
	2	confluence of inflammatory cells extending into the submucosa
	3	transmural extension of the inflammatory cell infiltrate
Infiltration of lamina propria	0	normal
by mononuclear cells	1	moderate
	2	great
Infiltration of lamina propria	0	normal
by polynuclear cells	1	moderate
	2	great
Infiltration of epithelium	0	no infiltration
by polynuclear cells	1	surface
	2	inside the crypt
	3	cryptic abscess
Severity of epithelial damage	0	absence of mucosal damage
	1	lymphoepithelial lesions
	2	mucosal erosion/ulceration
	3	extensive mucosal damage and extension through deeper structures of the bowel wall
Surface of epithelial damage	0	normal
	1	focal
	2	wide