ABSTRACT
The 15 cases of bronchogenic cysts operated during 15 years in the University Hospital of Rabat represent only 0.28% from 5.000 thoracics operated during the same period. These dysembryomas present a malformation of the tracheobronchic tree and they can be diagnosed at any age. They remain asymptomatic before fissuration or bronchial fistulisation. Their diagnosis is then essentially radiological [9 cases on 15]. Recently C.T. scan has given more informations delincate the connections of the cyst with mediastinal structures. Their surgery must always search their complete resection without harming the digestive, aerials or vascular structures. A colerette abrased or electrocoagulated, let in contact with these axis constitue an attitude of wisdom [6 times on 15]. The post operatory's evolution is excellent for short and long term