Role of endoscopy in caustic injury of the esophagus

Table 1 Assessment of severity: endoscopic score and computerized tomography score

Grade	Endoscopic score[16]	score[21]
I	Edema and hyperemia of the mucosa	No definite swelling of esophagus wall (< 3 mm, within normal limit)
II	IIa: Friability, hemorrhages, erosion, blisters, whitish membranes, exudates and superficial ulcerations IIb: IIa with deep or circumferential ulceration	Edematous wall thickening (> 3 mm) without periesophageal soft tissue infiltration
III	IIIa: Small scattered areas of necrosis IIIb: Extensive necrosis	Edematous wall thickening with periesophageal soft tissue infiltration plus well-demarcated tissue interface
IV	Perforation	Edematous wall thickening with periesophageal soft tissue infiltration plus blurring of tissue interface or localized fluid collection around the esophagus or the descending aorta