Table 1.

Graduation and criteria adopted for the histopathological characterization of ileal pouches.

Histopathological Change	Graduation
Degree of chronic inflammation (eosinophilic and lymphoplasmacytic)	Mild (0)
	Moderate (1)
	Intense (2)
Degree of acute inflammation (polymorphonuclear granulocytes)	Absent (0)
	Mild (1)
	Moderate (2)
	Intense (3)
Degree of activity	Absent (0)
	Acute cryptitis (1)
	Crypt microabscesses (2)
	Erosion or ulceration (3)
Presence of colonic metaplasia	Absent (0)
	Present (1)
Degree of mucosal atrophy	Absent (0)
	Distortion of crypts (1)
	Atrophy of crypts (2)
Degree of malignancy (cytoarchitectural atypia)	Mild (0)
	Low grade (1)
	High degree (2)
	Intramucosal Carcinoma (3)
	Invasive Carcinoma (4)