Presentation
Recurrent episodes of bronchiolitis.
Patient Data
There is aberrant branching of the left pulmonary artery which wraps around the trachea and compresses the carina and proximal left main bronchus (left pulmonary artery sling). There is no focal stenosis of either the left or right pulmonary artery.
The left lung appears slightly hyperinflated with respect to the right, suggesting some degree of air trapping from the left main bronchus compression.
Case Discussion
Left pulmonary artery sling is a congenital abnormality where the left pulmonary artery arises from the right main pulmonary artery.
It is associated with a number of other congenital abnormalities include complete tracheal rings, anorectal malformations and renal anomalies.
Barium swallow classically shows indentation of the anterior wall of the oesophagus at the level of the carina.
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