Table 1 Endoscopic score. The score is the result of the sum of each item

0 Normal aspect of the mucosa

0 No ulcers

0 No stenosis

0 Transparent

0 Absent

1 Hyperemia

1 Cicatricial ulcer

1 Mild stenosis

1 Mild

1 Present

2 Ulceration, covering < 1/4 of the circumference

2 Superficial ulcer

2 Stenosis preventing endoscope pass

2 Pronounced

3 Ulceration, covering 1/4 to 1/2 of the circumference

3 Medium depth ulcer

3 Totally opaque

4 Ulceration, covering > 1/2 of the circumference

4 Deep ulcer

5 Circumferential ulceration

5 Necrotic ulcer

6 Circumferential ulceration+ longitudinal extension