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Reflux Oesophagitis, the Los Angeles Classification
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The Los Angeles Classification System for the endoscopic assessment of reflux oesophagitis:
GRADE A: One or more mucosal breaks no longer than 5 mm, non of which extends between the tops of the mucosal folds
GRADE B: One or more mucosal breaks more than 5 mm long, none of which extends between the tops of two mucosal folds
GRADE C: Mucosal breaks that extend between the tops of two or more mucosal folds, but which involve less than 75% of the oesophageal circumference
GRADE D: Mucosal breaks which involve at least 75% of the oesophageal circumference
Reference: Dent J et al: An evidence-based appraisal of reflux disease management - the Genval Workshop report. Gut, 1999, vol 44, suppl 2, 1 - 16
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