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Retroaortic left renal vein and its implications in abdominal aortic surgery
C D Karkos1, I A Bruce, G J Thomson
1Department of Surgery, Blackpool Victoria Hospital, Blackpool, UK. ckarkos@hotmail.com
Annals of Vascular Surgery
|January 5, 2002
Summary
Variations in the inferior vena cava (IVC) and renal veins are common. Awareness of these rare venous anomalies is crucial to prevent surgical complications during abdominal aortic reconstruction.
Area of Science:
- Embryology
- Vascular Anatomy
- Surgical Anatomy
Background:
- The retroperitoneal venous system's embryological development is intricate, leading to significant anatomical variability in the inferior vena cava (IVC) and renal veins.
- Six main anatomical variants can arise from incomplete embryological development: retroaortic left renal vein (LRV) types I and II, circumaortic venous collar, IVC duplication, left-sided IVC, and preaortic iliac confluence.
Observation:
- These rare venous anomalies, though infrequent, are frequently encountered during abdominal aortic reconstruction procedures.
- Two cases of retroaortic LRV complicating abdominal aortic aneurysmectomy are presented.
- The study analyzes common infrarenal venous anomalies during aortic surgery.
Findings:
- Failure to recognize these anomalies can result in inadvertent surgical injury and significant venous hemorrhage.
- Preoperative diagnosis is possible with CT scans, but not always performed before aortic surgery.
Implications:
- Understanding and identifying these venous anomalies preoperatively is critical for surgical planning and patient safety.
- Enhanced awareness can mitigate risks associated with major venous bleeding during complex aortic surgeries.