CTICasesPulmonary Sling
Imaging findings
Chest radiograph shows an abnormal right paratracheal mediastinal contour. CT angiography confirms a pulmonary artery sling, where the left pulmonary artery arises aberrantly from the posterior aspect of the right pulmonary artery, coursing between the trachea and esophagus to reach the left hilum, causing mild airway compression.
Key takeaways
A pulmonary sling is a congenital vascular anomaly where the left pulmonary artery arises from the right pulmonary artery. It forms a vascular loop around the distal trachea and right main bronchus, which can be associated with airway anomalies such as complete tracheal rings or a bridging bronchus, although adult presentations are often less severe.
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