[Pulmonary artery sling. A rare disease picture with variable clinical symptoms]

In two patients with obstruction of the upper respiratory airways, echocardiography, subsequent angio-cardiography and bronchoscopy disclosed the presence of a pulmonary artery sling. The clinical course of the disease, the diagnostic approach and the procedures for surgical repair are described. Embryological as well as differential diagnostic aspects are discussed with regard to the literature.