Criteria
Montreal definition[2]
This classifies esophageal syndromes.
Syndromes with symptoms and no injury:
Typical reflux syndrome
Reflux chest pain syndrome.
Syndromes with esophageal injury:
Reflux esophagitis
Reflux stricture
Barrett esophagus
Esophageal adenocarcinoma.
Extraesophageal syndromes
Established associations:
Reflux cough syndrome
Reflux laryngitis syndrome
Reflux asthma syndrome
Reflux dental erosion syndrome.
Proposed associations:
Pharyngitis
Sinusitis
Idiopathic pulmonary fibrosis
Recurrent otitis media.
Some researchers suggest that the concept of GERD as a composite, symptom-based entity requires reevaluation.[8]
Los Angeles classification of esophagitis[59][60]
The Los Angeles classification of esophagitis assigns patients to grades A to D, depending on endoscopic findings of mucosal breaks in the distal esophagus indicative of esophagitis:
Grade A: breaks of ≤5 mm
Grade B: breaks >5 mm
Grade C: breaks extending between the tops of ≥2 mucosal folds, but <75% of circumference
Grade D: circumferential breaks (≥75%).
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