Inferior vena cava web

Inferior vena cava (IVC) webs are an uncommon condition characterised by obstruction of the hepatic segment of the inferior vena cava by a membrane or fibrous band. This is often associated with occlusion of one or more of the hepatic veins.

If there is hepatic vein involvement, patients may present with Budd-Chiari syndrome

It may be a congenital/developmental anomaly. More commonly they arise as fibrotic band as post-thrombotic sequelae with the regressed thrombus replaced by fibrous laminar structure. It can lead to hepatic outflow obstruc­tion.

  • intrahepatic IVC may have a linear filling defect representing the web
  • features of hepatic vein obstruction may be present (also see: Budd-Chiari syndrome):
    • flow reversal on Doppler ultrasound
    • non-obstructed hepatic veins may be dilated
    • collateral pathways between obstructed hepatic veins
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Article information

rID: 43041
Section: Pathology
Synonyms or Alternate Spellings:
  • IVC webs

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