Two rare cases of circumaortic left renal vein with double retroaortic limbs and its procedural implications

Area of Science:

• Anatomy
• Vascular Surgery
• Medical Imaging

Background:

• Anatomical variations of the renal veins can impact surgical planning.
• A circumaortic left renal vein is a known anomaly, but an additional retroaortic limb is exceptionally rare.

Observation:

• Two cases of circumaortic left renal vein with an additional retroaortic limb were identified.
• In one case, the retroaortic limb drained into the hemiazygos vein.
• In the second case, the retroaortic limb drained into the inferior vena cava (IVC).

Findings:

• The study details a rare venous anomaly: circumaortic left renal vein with an additional retroaortic limb.
• The observed drainage patterns into the hemiazygos vein and IVC highlight the variability of this rare condition.

Implications:

• Understanding this rare venous variant is crucial for accurate diagnosis and surgical planning.
• Awareness of this anomaly can prevent intraoperative complications during abdominal surgeries.
• Further research into the embryological basis and clinical significance of such variants is warranted.