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Precaval draining vein from paraesophageal varices: radiologic-anatomic correlation
K Ibukuro1, T Tsukiyama, K Mori
1Department of Radiology, Mitsui Memorial Hospital, Tokyo, Japan.
AJR. American Journal of Roentgenology
|March 4, 1999
Summary
This study details the CT imaging characteristics of the precaval vein, a vessel draining paraesophageal varices in liver cirrhosis patients. The vein courses anteriorly to the inferior vena cava, connecting to its right anterior aspect.
Area of Science:
- Radiology
- Vascular Anatomy
- Gastroenterology
Background:
- Paraesophageal varices are a potential complication of liver cirrhosis.
- Understanding collateral venous pathways is crucial for managing portal hypertension.
Purpose of the Study:
- To describe the computed tomography (CT) features of the precaval draining vein in patients with liver cirrhosis.
- To assess the anatomical course and drainage pattern of this vein.
Main Methods:
- Retrospective analysis of CT scans from six patients with liver cirrhosis and paraesophageal varices.
- Detailed description of the precaval vein's course, diameter, and termination point.
Main Results:
- The precaval vein was identified as a distinct anatomical structure.
- It courses anteriorly to the inferior vena cava (IVC).
- Drainage occurred into the right anterior aspect of the IVC, with diameters ranging from 3 to 13 mm (mean 6.5 mm).
Conclusions:
- The precaval vein represents a significant collateral pathway in liver cirrhosis.
- Its anatomical course and drainage into the IVC are consistently demonstrated on CT.
- This vein is anatomically consistent with the confluence of the right and left inferior phrenic veins.