May Be Caused by

 Common

Achalasia

Infantile respiratory distress syndrome

Intubation

Respirator therapy

Scleroderma

 Uncommon

Caustic esophagitis

Chagas disease

Esophageal diverticulum

Esophageal surgery

Gastroesophageal regurgitation

Hypertensive lower esophageal sphincter

Mediastinal cyst

Mediastinal lymphadenopathy

Mediastinal tumor

Mediastinitis

Neoplasm of esophagus

Obstruction of esophagus

Pulmonary surgery