Incidental recognition of partial anomalous pulmonary venous return involving the left inferior pulmonary vein during central venous catheterization: A case report.

Partial anomalous pulmonary venous return (PAPVR) is a rare congenital anomaly that may complicate central venous access by predisposing to catheter malposition. We report a 70-year-old woman in whom a left internal jugular dialysis catheter was inadvertently advanced into the left inferior pulmonary vein through an anomalous connection with the left innominate vein. Computed tomography (CT) angiography confirmed PAPVR, and the catheter was safely removed. This case illustrates the procedural risks of unrecognized venous anomalies and emphasizes the importance of CT imaging and vigilance when catheter trajectories deviate from expected anatomical pathways.