Comparison of a new stent and Wallstent for transjugular intrahepatic portosystemic shunt in a porcine model

Figure 2 a. The portal venography obtained immediately shows that the TIPS shunt (arrows) is well created between the hepatic vein (H) and the portal vein (P). b. The shunt remains patent in the portography taken immediately before the euthanasia at 2 weeks after stent placement. c. The gross examination of the specimen shows that the surface of the stent (straight arrows) is covered by a smooth and thin layer endothelia-like tissue (curved arrows) which does not extend to the ends of the stent at the IVC and the portal vein (P). d. Low magnification photomicrography of the TIPS reaction shows a mild myofibroblastic cell proliferation (M) under stent meshes (S) (Modified Giemsa and basic Fuchsin stain, × 3.12). e. The myofibroblastic cells are primarily composed of smooth muscle cells. (Anti-SMCα actin stain, × 125).