Figure 19From: 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 damageFibrotic portal tract. A fibrotic portal tract (see Fig. 6, box on the right) is observed at higher magnification. The wall of the portal vein appears damaged (A – trichrome staining). Remnants of small bile ducts can also be identified (B – CK7 staining), and an aberrant vessel is at the top of the figure.Back to article page