[Pulmonary sling or ring-sling complex? respiratory problems--diagnosis, therapy, prognosis].

PS is a rare congenital vascular anomaly in which the left pulmonary artery originates from the right pulmonary artery and courses between trachea and esophagus to the hilus of the left lung causing compression of the right mainstem bronchus and trachea. In about half of all cases this vessel anomaly is associated with tracheo-bronchial and/or cardiovascular malformations. We present 6 patients with PS concentrating on the accompanying malformations of the tracheobronchial tree. All patients had the typical symptoms of wheezing and stridor already in early infancy. 3 patients showed concomitant tracheobronchial anomalies. 2 patients had additional cardiovascular deformities. In 3 of the patients the positive clinical course allowed conservative therapy. In the case of 2 further patients the respiratory problems demanded surgery, one of this patients died. A further patient died after palliative surgery of cardiac anomaly.