Cirrhosis

• Visualization of patent paraumbilical collateral veins is the most specific CT sign of portal hypertension
• Regenerative nodules appear larger on portal venous and delayed phase images than they do on precontrast or in arterial phase
  • This finding is not found in malignant nodules
• Right lobe tends to be preferentially affected and is characteristic of alcoholic micronodular cirrhosis given more preferential portal flow from stomach and direct gastric absorption of alcohol