Nocturnal cough and esophagogastric polyp: causal or casual association?

A 6-year-old boy presented with nocturnal cough of 8 months duration. Upper gastrointestinal endoscopy (UGIE) showed an esophagogastric polyp and esophagitis. The 24 hours ambulatory pH recording revealed moderate gastro esophageal reflux (GER) and esophageal manometry demonstrated hypotensive lower esophageal sphincter (LES).