Question: What are the details of the classification system often used for endoscopic grading of esophageal injury secondary to caustic ingestion?
Answer: Grade 0: No detectable mucosal change; Grade 1: erythema of mucosa; Grade 2: Erythema, sloughing, ulceration and non-circumferential exudates; Grade 3 Deep mucosal ulceration and circumferential mucosal sloughing; Grade 4 Eschar, full thickness changes and perforation. (Riffat F and Cheng A. Pediatric caustic ingestion: 50 consecutive cases and a review of the literature. 2009 Disease of the Esophagus 22:89-94)
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