Teenager with a liver lesion

Axial and coronal CT with contrast of the abdomen arterial phase imaging (left) shows an enhancing round lesion in the dome of the liver that has a central scar which fills in on the portal venous phase imaging and becomes isodense with the surrounding liver parenchyma (center). Axial T1 MRI with Eovist (hepatocyte specific) contrast of the abdomen in the arterial phase (right upper) again shows the enhancing round lesion with a central scar that fills in the portal venous phase imaging (right center) and then retains its contrast on the delayed phase imaging (right lower).

The diagnosis was focal nodular hyperplasia.