CTICasesLeft Upper Lobe Partial Anomalous Pulmonary Venous Return
Imaging findings
Chest radiograph of a thin young patient demonstrates an abnormal upward-coursing vascular contour along the left superior mediastinal border, obscuring the normal aortopulmonary reflection. CT confirms this vascular structure is an anomalous left upper lobe pulmonary vein draining into the systemic venous system, consistent with partial anomalous pulmonary venous return (PAPVR). The patient also has an incidental aberrant right subclavian artery.
Key takeaways
Left-sided partial anomalous pulmonary venous return (PAPVR) is an uncommon congenital anomaly that can be detected on chest radiographs as a vertical vein coursing upward to drain into the left brachiocephalic vein. This finding is particularly conspicuous in thin patients with minimal mediastinal fat.
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