May Cause

Anterior mediastinal lesion

Esophagobronchial fistula

Middle mediastinal lesion

Posterior mediastinal lesion

Retrosternal mass

Soft-tissue mediastinal mass

Tracheoesophageal fistula

Upper airway obstruction in a child

Wide mediastinum

Wide right tracheal stripe

Wide superior mediastinum in an infant or child

May Be Caused by

 Common

Actinomycosis

Boerhaave syndrome

Coccidioidomycosis

Dilatation of esophageal stricture

Endoscopic trauma

Esophageal carcinoma

Esophageal perforation

Histoplasmosis

Surgery

Trauma

Tuberculosis

 Uncommon

Atypical mycobacterial infection

Dental infection

Drug abuse

Lung abscess

Opportunistic infection

Osteomyelitis of spine

Osteomyelitis of sternum

Pancreatic pseudocyst

Pancreatitis

Pharyngeal abscess

Pleural empyema

Pleural infection

Pneumonia

Subphrenic abscess

Tonsillitis

Traumatic bronchial rupture

Traumatic tracheal rupture