CTICasesProximal interruption of the left pulmonary artery with right aortic arch
Imaging findings
Chest radiograph shows left lung volume loss, absence of a normal left pulmonary artery shadow, and a right-sided aortic arch. CT confirms proximal interruption of the left pulmonary artery.
Key takeaways
Proximal interruption of the pulmonary artery is a congenital vascular anomaly where the proximal PA fails to develop. Left-sided interruption is highly associated with a contralateral right-sided aortic arch, making it easier to recognize on plain radiographs.
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