Intrapulmonary course of the inferior vena cava: a rare congenital anomaly.

Congenital anomalies of the inferior vena cava (IVC) are often encountered incidentally in cross sectional imaging modalities. The most frequently described anomalies include retroaortic left renal vein, left IVC, double IVC, circumaortic left renal vein, interruption of IVC with azygos and hemiazygos continuation, absence of the infrarenal IVC, and circumcaval ureter. This report shows an unusual case of congenital inferior vena cava anomaly, characterized by an intrapulmonary course of the inferior vena cava.