[Bronchogenic cysts compressing the trachea and main bronchus]

21 cases of bronchogenic cysts and 8 cases of oesophageal duplications obstructing trachea and main bronchus are described. These mediastinal obstructing cysts should be recognized very early to avoid complications: respiratory distress and destroyed lung particularly. Surgery is not difficult and the results are good. 28 children are alive with no symptom and one death only occurred.