Figure 11From: Over-expression of glutamine synthase in focal nodular hyperplasia (part 1): Early stages in the formation support the hypothesis of a focal hyper-arterialisation with venous (portal and hepatic) and biliary damageSmall hepatic veins. A – GS staining. B – α-SMA staining. In the rather faint GS-positive area, a small hepatic vein (black arrow) was identified on the right. The vascular lumen was no longer observed on the left (blue arrow). No artery was seen in the vicinity.Back to article page