Portosystemic collateral vessels in liver cirrhosis: a three-dimensional MDCT pictorial review
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Elie Moubarak1, Antoine Bouvier, Jérôme Boursier
1Department of Radiology, Angers University Hospital, Angers, France.
Insights
Portosystemic collateral vessels (PSCV) in chronic liver disease can lead to serious complications. Multi-detector CT (MDCT) imaging precisely maps these vessels, aiding crucial therapeutic decisions.
Area of Science:
- Radiology
- Gastroenterology
- Hepatology
Background:
- Portal hypertension in chronic liver disease leads to portosystemic collateral vessels (PSCV).
- PSCV formation significantly impacts patient prognosis due to risks of digestive hemorrhage and hepatic encephalopathy.
Purpose of the Study:
- To describe and categorize portosystemic collateral vessels (PSCV) based on their drainage patterns.
- To highlight the clinical significance of different PSCV types in patients with chronic liver disease.
Main Methods:
- Utilized a 16-MDCT scanner for imaging.
- Employed maximum intensity projection and volume rendering techniques for detailed PSCV analysis.
Main Results:
- Classified PSCV based on drainage into the superior or inferior vena cava.
- Identified various PSCV subtypes including gastric, esophageal, and para-esophageal varices (superior vena cava group); and gastro-splenorenal shunts, paraumbilical veins, retroperitoneal shunts, mesenteric varices, gallbladder varices, and omental vessels (inferior vena cava group).
- Correlated specific PSCV with clinical outcomes: esophageal/gastric varices with bleeding, splenorenal shunts with encephalopathy, and paraumbilical veins with portal decompression.
Conclusions:
- Accurate mapping of PSCV is critical for guiding treatment strategies.
- Multi-detector CT (MDCT) is the optimal imaging modality for understanding and delineating PSCV anatomy and variations.
Purpose:
Portosystemic collateral vessels (PSCV) are a consequence of the portal hypertension that occurs in chronic liver diseases. Their prognosis is strongly marked by the risk of digestive hemorrhage and hepatic encephalopathy.
Materials And Methods:
CT was performed with a 16-MDCT scanner. Maximum intensity projection and volume rendering were systematically performed on a workstation to analyze PSCV.
Results:
We describe the PSCV according to their drainage into either the superior or the inferior vena cava. In the superior vena cave group, we found gastric veins, gastric varices, esophageal, and para-esophageal varices. In the inferior vena cava group, the possible PSCV are numerous, with different sub groups: gastro and spleno renal shunts, paraumbilical and abdominal wall veins, retroperitoneal shunts, mesenteric varices, gallbladder varices, and omental collateral vessels. Regarding clinical consequences esophageal and gastric varices are most frequently involved in digestive bleeding; splenorenal shunts often lead to hepatic encephalopathy; the paraumbilical vein is an acceptable derivation pathway for natural decompression of the portal system.
Conclusion:
Knowledge of precise cartography of PSCV is essential to therapeutic decisions. MDCT is the best way to understand and describe the different types of PSCV.
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