CTICasesLeft Pulmonary Artery Sling
[...]. Left Pulmonary Artery Sling. CTICases. Published January 21, 2022. https://str-case-explorer.pages.dev/c/m23rw
Imaging findings
CT chest shows the left pulmonary artery originating anomalously from the posterior aspect of the right pulmonary artery, taking a course between the trachea and the esophagus to reach the left hilum. This vascular loop causes extrinsic compression and narrowing of the distal trachea.
Key takeaways
A pulmonary artery sling is a congenital anomaly where the left pulmonary artery arises from the right pulmonary artery. As it courses back to the left, it forms a vascular ring around the right main bronchus and trachea, often presenting in infancy with respiratory distress due to tracheobronchial stenosis, though mild cases can be found incidentally in adults.
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