Table 1. Histologic Scores for Assessing Severity of Fibrosis in Crohn's Disease.

Score	Fibrosis
0 (none)	No fibrosis
1 (mild)	Minimal fibrosis in submucosa or subserosa
2 (moderate)	Increased submucosal fibrosis; septa extending into muscularis propria and/or septa extending through muscularis propria; increase in subserosal collagen
3 (severe)	Significant transmural scar; marked subserosal collagen