CTICasesAnomalous origin of left common carotid artery from pulmonary artery
Imaging findings
Brain MRI, chest MRI, and CT angiography show anomalous origin of the left common carotid artery from the main pulmonary artery, associated with a right-sided aortic arch, aberrant left subclavian artery, and bilateral superior vena cava. Multiple bilateral cerebral infarcts are present.
Key takeaways
Anomalous origin of the left common carotid artery from the pulmonary artery is an extremely rare congenital vascular variant. It can cause a right-to-left shunt under elevated pulmonary pressures, predisposing the patient to paradoxical systemic embolism and ischemic strokes.
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