Inferior vena cava web
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Inferior vena cava (IVC) webs are an uncommon condition characterized 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 bands as post-thrombotic sequelae with the regressed thrombus replaced by a 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
- 1. Smillie RP, Shetty M, Boyer AC et-al. Imaging evaluation of the inferior vena cava. Radiographics. 2015;35 (2): 578-92. doi:10.1148/rg.352140136 - Pubmed citation
- 2. Vijayaraghavan SB, Ramchandran P, Cherian M. Valvular-type membranous obstruction of the inferior vena cava with vertebral collaterals: color Doppler findings. J Ultrasound Med. 2003;22 (2): 233-7. J Ultrasound Med.
- 3. Bozorgmanesh A, Selvam DA, Caridi JG. Budd-Chiari syndrome: hepatic venous web outflow obstruction treated by percutaneous placement of hepatic vein stent. Semin Intervent Radiol. 2007;24 (1): 100-5. doi:10.1055/s-2007-971200 - Free text at pubmed - Pubmed citation