Five major sites of portosystemic venous collaterals are visualized by ultrasound:

• Gastroesophageal junction
• Paraumbilical vein
• Splenorenal and gastrorenal
• Intestinal
• Hemorrhoidal 
  
  
  

Portal hypertension: Sagittal image shows a recanalized paraumbilical vein in a patient with gross ascites

Portal hypertension: Enlarged coronary vein on sagittal image running cephaled from the splenic vein

Portal hypertension: Gray scale & color Doppler images showing splenic hilar varices