Figure 14From: 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 foci. GS foci (A – upper panel) contained a small artery (black arrow and insert) very close to arterial branches (blue arrows), better seen in a α-SMA staining (B – lower panel).Back to article page