Figure 13From: 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 damageGS-positive staining. A – Lower magnification. B – Higher magnification The GS staining surrounds unstained hepatocytes (asterisk). Hepatic veins were not visible; a small artery (arrow) was seen at the edge of the GS-positive area.Back to article page