Image 1 – Duplication of inferior vena cava.
This is a not uncommon variation. The left sided IVC (black arrow) most commonly ends in the normal left renal vein.
Image 2 – Duplication of superior vena cava.
This is a rare variation of the SVC. The left sided SVC (white arrow) is draining into the left atrium, thereby bypassing the pulmonary circulation. The right SVC is normal.
1. J. Edward Bass, Michael D. Redwine et al. Spectrum of Congenital Anomalies of the Inferior Vena Cava: Cross-sectional Imaging Findings. RadioGraphics 2000; 20: 639.
2. GM Kellman, MB Alpern, MA Sandler, and BM Craig. Computed tomography of vena caval anomalies with embryologic correlation. RadioGraphics 1988; 8: 533.
Credit: Dr Abhijit Datir