Table 1: The Montreal definition of GERD and its constituent syndromes [1].

Esophageal syndromes

Syndromes with symptoms
 (i) Typical reflux syndrome
 (ii) Reflux chest pain
Syndromes with esophageal injury
 (i) Reflux esophagitis
 (ii) Reflux stricture
 (iii) Barrett’s esophagus
 (iv) Esophageal adenocarcinoma

Extraesophageal syndromes

Established associations
 (i) Reflux cough syndrome
 (ii) Reflux laryngitis syndrome
 (iii) Reflux asthma syndrome
 (iv) Reflux dental erosion syndrome
Proposed associations
 (i) Pharyngitis
 (ii) Sinusitis
 (iii) Idiopathic pulmonary fibrosis
 (iv) Recurrent otitis media