Table 1.

Definition of endoscopic features of inflammation

Vascular pattern	Changes in normal vascular pattern, decreased or absent
Erythema	Reddening of the mucosa
Oedema	Swollen mucosa
Granularity	Micronodular mucosal surface
Blood in lumen	Free intraluminal blood
Erosions	Small superficial defect in the mucosa, of a white or yellow colour, with a flat edge
Ulcerations	Compared to erosions, larger and deeper excavated fibrin covered lesions
Friability	Bleeding mucosa either at contact or spontaneously