Self-Expandable Metal Stenting of Refractory Upper Gut Corrosive Strictures: A New Role for Endoscopy?

Table 1

Zargar endoscopic classification for caustic mucosal injury (adapted from [7]).

Grade	Definition
0	normal findings at endoscopy
1	edema and hyperemia of mucosa
2A	friability, hemorrages, erosions, blisters, whitish membranes, exudates and superficial ulcerations
2B	grade 2A plus deep discrete or circumferential ulcerations
3A	small scattered multiple ulcerations and areas of necrosis (brown-black or greyish discoloration)
3B	extensive necrosis