CTICasesAnomalous Left Brachiocephalic Artery from LPA
Imaging findings
CTA shows a right aortic arch with a right ductus arteriosus, a right common carotid, and a right subclavian artery. The left common carotid and left subclavian arteries arise from a common brachiocephalic trunk originating directly from the left pulmonary artery (LPA). Associated partial anomalous pulmonary venous return is noted.
Key takeaways
Anomalous origin of the left brachiocephalic or carotid artery from the pulmonary artery is a rare congenital anomaly. It represents a persistent branchial arch variant and is typically associated with other cardiovascular anomalies like ductus arteriosus and venous anomalies.
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