Table 1

Histological scoring system for Crohn’s disease

*A moderate increase defined as being up to twice the normal number of cells; severe increase more than twice the normal number.
A	Continuity of surface epithelium	0	Normal
		1	Patchy/discontinuous
		2	Ulcers
B	Infiltration of polymorphonuclear leucocytes in the lamina propria and epithelium	0	Normal
		1	Moderate increase
		2	Severe increase
C	Infiltration of mononuclear leucocytes in the lamina propria	0	Normal
		1	Moderate increase
		2	Severe increase
D	Inflammatory infiltrate in the submucosa	0	Normal
		1	Moderate increase
		2	Severe increase
E	Inflammatory infiltrate in the muscularis propria	0	Normal
		1	Moderate increase
		2	Severe increase