Although computed tomographic (CT) characteristics of the inferior vena cava may mimic lymphadenopathy, careful appraisal of the vascular anatomy can diagnose major vascular anomalies by noninvasive techniques, eliminating the need for angiography as well as alerting surgical colleagues of the benign nature of this entity. The 1st case of circumaortic renal vein in a patient is documented by CT. The CT appearance and its clinical significance is discussed.